geom_ribbon() now appropriately warns about, and removes, missing values
(@teunbrand, #6243).
guide_*() can now accept two inside legend theme elements:
legend.position.inside and legend.justification.inside, allowing inside
legends to be placed at different positions. Only inside legends with the same
position and justification will be merged (@Yunuuuu, #6210).
New stat: stat_manual() for arbitrary computations (@teunbrand, #3501)
Reversal of a dimension, typically 'x' or 'y', is now controlled by the
reverse argument in coord_cartesian(), coord_fixed(), coord_radial()
and coord_sf(). In coord_radial(), this replaces the older direction
argument (#4021, @teunbrand).
coord_radial() displays minor gridlines now (@teunbrand).
(internal) continuous_scale() and binned_scale() sort the limits
argument internally (@teunbrand).
Theme margins can have NA-units to inherit from parent elements. The new
function margin_part() has NA-units as default (@teunbrand, #6115)
New margin_auto() specification for theme margins.
New argument labs(dictionary) to label based on variable name rather than
based on aesthetic (@teunbrand, #5178)
Fixed bug in out-of-bounds binned breaks (@teunbrand, #6054)
Binned guides now accept expressions as labels (@teunbrand, #6005)
(internal) Scale$get_labels() format expressions as lists.
In non-orthogonal coordinate systems (coord_sf(), coord_polar() and
coord_radial()), using 'AsIs' variables escape transformation when
both x and y is an 'AsIs' variable (@teunbrand, #6205).
The following methods have been deprecated: fortify.lm(), fortify.glht(),
fortify.confint.glht(), fortify.summary.glht() and fortify.cld(). It
is recommend to use broom::augment() and broom::tidy() instead
(@teunbrand, #3816).
Custom and raster annotation now respond to scale transformations, and can use AsIs variables for relative placement (@teunbrand based on @yutannihilation's prior work, #3120)
When discrete breaks have names, they'll be used as labels by default (@teunbrand, #6147).
The helper function is.waiver() is now exported to help extensions to work
with waiver() objects (@arcresu, #6173).
Date(time) scales now throw appropriate errors when date_breaks,
date_minor_breaks or date_labels are not strings (@RodDalBen, #5880)
geom_errorbarh() is deprecated in favour of
geom_errorbar(orientation = "y") (@teunbrand, #5961).
geom_contour() should be able to recognise a rotated grid of points
(@teunbrand, #4320)
geom_boxplot() gains additional arguments to style the colour, linetype and
linewidths of the box, whiskers, median line and staples (@teunbrand, #5126)
(internal) Using after_scale() in the Geom*$default_aes() field is now
evaluated in the context of data (@teunbrand, #6135)
Fixed bug where binned scales wouldn't simultaneously accept transformations and function-limits (@teunbrand, #6144).
Fixed bug where the ggplot2::-prefix did not work with stage()
(@teunbrand, #6104).
New get_labs() function for retrieving completed plot labels
(@teunbrand, #6008).
Built-in theme_*() functions now have ink and paper arguments to control
foreground and background colours respectively (@teunbrand)
The summary() method for ggplots is now more terse about facets
(@teunbrand, #5989).
guide_bins(), guide_colourbar() and guide_coloursteps() gain an angle
argument to overrule theme settings, similar to guide_axis(angle)
(@teunbrand, #4594).
coord_*(expand) can now take a logical vector to control expansion at any
side of the panel (top, right, bottom, left) (@teunbrand, #6020)
(Breaking) The defaults for all geoms can be set at one in the theme. (@teunbrand based on pioneering work by @dpseidel, #2239)
theme(geom) argument is used to track these defaults.element_geom() function can be used to populate that argument.from_theme() function allows access to the theme default fields from
inside the aes() function.Passing empty unmapped aesthetics to layers raises a warning instead of throwing an error (@teunbrand, #6009).
Moved {mgcv} from Imports to Suggests (@teunbrand, #5986)
New reset_geom_defaults() and reset_stat_defaults() to restore all geom or
stat default aesthetics at once (@teunbrand, #5975).
facet_wrap() can have space = "free_x" with 1-row layouts and
space = "free_y" with 1-column layouts (@teunbrand)
Secondary axes respect n.breaks setting in continuous scales (@teunbrand, #4483).
Layers can have names (@teunbrand, #4066).
(internal) improvements to pal_qualitative() (@teunbrand, #5013)
coord_radial(clip = "on") clips to the panel area when the graphics device
supports clipping paths (@teunbrand, #5952).
(internal) Panel clipping responsibility moved from Facet class to Coord
class through new Coord$draw_panel() method.
theme(strip.clip) now defaults to "on" and is independent of Coord
clipping (@teunbrand, 5952).
(internal) rearranged the code of Facet$draw_panels() method (@teunbrand).
Axis labels are now justified across facet panels (@teunbrand, #5820)
Fixed bug in stat_function() so x-axis title now produced automatically
when no data added. (@phispu, #5647).
geom_sf now accepts shape names (@sierrajohnson, #5808)
Missing values from discrete palettes are no longer translated (@teunbrand, #5929).
Fixed bug in facet_grid(margins = TRUE) when using expresssions
(@teunbrand, #1864).
geom_step() now supports the orientation argument (@teunbrand, #5936).
position_dodge() and position_jitterdodge() now have a reverse argument
(@teunbrand, #3610)
coord_radial(r.axis.inside) can now take a numeric value to control
placement of internally placed radius axes (@teunbrand, #5805).
(internal) default labels are derived in ggplot_build() rather than
in ggplot_add.Layer() (@teunbrand, #5894)
An attempt is made to use a variable's label attribute as default label (@teunbrand, #4631)
Themes gain an additional header_family argument to easily set the font
for headers and titles (#5886).
The plot.subtitle, plot.caption and plot.tag theme elements now inherit
from the root text element instead of the title element (#5886).
ggplot2 no longer imports {glue} (@teunbrand, #5986).
geom_rect() can now derive the required corners positions from x/width
or y/height parameterisation (@teunbrand, #5861).
All position scales now use the same definition of x and y aesthetics.
This lets uncommon aesthetics like xintercept expand scales as usual.
(#3342, #4966, @teunbrand)
Bare numeric values provided to Date or Datetime scales get inversely transformed (cast to Date/POSIXct) with a warning (@teunbrand).
stat_bin() now accepts functions for argument breaks (@aijordan, #4561)
(internal) The plot's layout now has a coord parameter that is used to prevent setting up identical panel parameters (#5427)
(internal) rearranged the code of Facet$draw_panels() method (@teunbrand).
geom_rug() prints a warning when na.rm = FALSE, as per documentation (@pn317, #5905)
position_dodge(preserve = "single") now handles multi-row geoms better,
such as geom_violin() (@teunbrand based on @clauswilke's work, #2801).
position_jitterdodge() now dodges by group (@teunbrand, #3656)
The arrow.fill parameter is now applied to more line-based functions:
geom_path(), geom_line(), geom_step() geom_function(), line
geometries in geom_sf() and element_line().
Fixed bug where binned guides would keep out-of-bounds breaks (@teunbrand, #5870).
The size of the draw_key_polygon() glyph now reflects the linewidth
aesthetic (#4852).
New function complete_theme() to replicate how themes are handled during
plot building (#5801).
Special getter and setter functions have been renamed for consistency, allowing
for better tab-completion with get_*- and set_*-prefixes. The old names
remain available for backward compatibility (@teunbrand, #5568).
| New name | Old name |
| -------------------- | ----------------- |
| get_theme() | theme_get() |
| set_theme() | theme_set() |
| replace_theme() | theme_replace() |
| update_theme() | theme_update() |
| get_last_plot() | last_plot() |
| get_layer_data() | layer_data() |
| get_layer_grob() | layer_grob() |
| get_panel_scales() | layer_scales() |
Discrete scales now support minor_breaks. This may only make sense in
discrete position scales, where it affects the placement of minor ticks
and minor gridlines (#5434).
Discrete position scales now expose the palette argument, which can be used
to customise spacings between levels (@teunbrand, #5770).
The default se parameter in layers with geom = "smooth" will be TRUE
when the data has ymin and ymax parameters and FALSE if these are
absent. Note that this does not affect the default of geom_smooth() or
stat_smooth() (@teunbrand, #5572).
The bounded density option in stat_density() uses a wider range to
prevent discontinuities (#5641).
geom_raster() now falls back to rendering as geom_rect() when coordinates
are not Cartesian (#5503).
stat_ecdf() now has an optional weight aesthetic (@teunbrand, #5058).
Position scales combined with coord_sf() can now use functions in the
breaks argument. In addition, n.breaks works as intended and
breaks = NULL removes grid lines and axes (@teunbrand, #4622).
(Internal) Applying defaults in geom_sf() has moved from the internal
sf_grob() to GeomSf$use_defaults() (@teunbrand).
facet_wrap() has new options for the dir argument to more precisely
control panel directions. Internally dir = "h" or dir = "v" is deprecated
(@teunbrand, #5212).
Prevented facet_wrap(..., drop = FALSE) from throwing spurious errors when
a character facetting variable contained NAs (@teunbrand, #5485).
When facets coerce the faceting variables to factors, the 'ordered' class is dropped (@teunbrand, #5666).
geom_curve() now appropriately removes missing data instead of throwing
errors (@teunbrand, #5831).
update_geom_defaults() and update_stat_defaults() have a reset mechanism
when using new = NULL and invisible return the previous defaults (#4993).
Fixed regression in axes where breaks = NULL caused the axes to disappear
instead of just rendering the axis line (@teunbrand, #5816).
geom_point() can be dodged vertically by using
position_dodge(..., orientation = "y") (@teunbrand, #5809).
Fixed bug where na.value was incorrectly mapped to non-NA values
(@teunbrand, #5756).
Fixed bug in guide_custom() that would throw error with theme_void()
(@teunbrand, #5856).
New helper function gg_par() to translate ggplot2's interpretation of
graphical parameters to {grid}'s interpretation (@teunbrand, #5866).
scale_{x/y}_discrete() can now accept a sec.axis. It is recommended to
only use dup_axis() to set custom breaks or labels, as discrete variables
cannot be transformed (@teunbrand, #3171).
stat_density() has the new computed variable: wdensity, which is
calculated as the density times the sum of weights (@teunbrand, #4176).
theme() gets new spacing and margins arguments that all other spacings
and (non-text) margins inherit from (@teunbrand, #5622).
geom_ribbon() can have varying fill or alpha in linear coordinate
systems (@teunbrand, #4690).
geom_tile() computes default widths and heights per panel instead of
per layer (@teunbrand, #5740).
The fill of the panel.border theme setting is ignored and forced to be
transparent (#5782).
stat_align() skips computation when there is only 1 group and therefore
alignment is not necessary (#5788).
position_stack() skips computation when all x values are unique and
therefore stacking is not necessary (#5788).
A new ggplot_build() S3 method for <ggplot_built> classes was added, which
returns input unaltered (@teunbrand, #5800).
width is implemented as aesthetic instead of parameter in geom_col() and
geom_bar() (#3142).
Fix a bug in position_jitterdodge() where different jitters would be applied
to different position aesthetics of the same axis (@teunbrand, #5818).
In stat_bin(), the default boundary is now chosen to better adhere to
the nbin argument (@teunbrand, #5882, #5036)
after_stat() and after_scale() throw warnings when the computed aesthetics
are not of the correct length (#5901).
guide_colourbar() now correctly hands off position and available_aes
parameters downstream (@teunbrand, #5930)
geom_hline() and geom_vline() now have position argument
(@yutannihilation, #4285).
New function get_strip_labels() to retrieve facet labels (@teunbrand, #4979)
Fixed bug in position_dodge2()'s identification of range overlaps
(@teunbrand, #5938, #4327).
Fixed bug where empty discrete scales weren't recognised as such (@teunbrand, #5945).
(internal) The summary function of stat_summary() and stat_summary_bin()
is setup once in total instead of once per group (@teunbrand, #5971)
facet_grid(space = "free") can now be combined with coord_fixed()
(@teunbrand, #4584).
theme_classic() now has black ticks and text instead of dark gray. In
addition, theme_classic()'s axis line end is "square" (@teunbrand, #5978).
{tibble} is now suggested instead of imported (@teunbrand, #5986)
The ellipsis argument is now checked in fortify(), get_alt_text(),
labs() and several guides (@teunbrand, #3196).
stat_summary_bin() no longer ignores width parameter (@teunbrand, #4647).
Added keep.zeroes argument to stat_bin() (@teunbrand, #3449)
(internal) removed barriers for using 2D structures as aesthetics (@teunbrand, #4189).
coord_sf() no longer errors when dealing with empty graticules (@teunbrand, #6052)
Added theme_transparent() with transparent backgrounds (@topepo).
New theme elements palette.{aes}.discrete and palette.{aes}.continuous.
Theme palettes replace palettes in scales where palette = NULL, which is
the new default in many scales (@teunbrand, #4696).
guide_axis() no longer reserves space for blank ticks
(@teunbrand, #4722, #6069).
geom_abline() clips to the panel range in the vertical direction too
(@teunbrand, #6086).
Added panel.widths and panel.heights to theme() (#5338, @teunbrand).
This is a small release focusing on fixing regressions from 3.5.0 and documentation updates.
NAs (#5623)sec_axis() with breaks = NULL (#5713).geom_sf()
(@teunbrand, #5716).resolution() has been reverted to pre-3.5.0
behaviour. Whether mapped discrete vectors should be treated as having
resolution of 1 is controlled by the new discrete argument.guide_bins() and guide_coloursteps() where discrete breaks,
such as the levels produced by cut(), were ordered incorrectly
(@teunbrand, #5757).coord_map() and coord_polar() throw informative warnings when used
with the guide system (#5707).stat_contour(breaks), that function is used to
calculate the breaks even if bins and binwidth are missing
(@teunbrand, #5686).geom_step() now supports lineend, linejoin and linemitre parameters
(@teunbrand, #5705)..data pronoun is used in aes() (#5730).stat_bin() deals with non-finite breaks better (@teunbrand, #5665).coord_radial() don't neatly fit the top/right/bottom/left
organisation, specifying position = "top" or position = "right"
in the scale will flip the placement of the radial axis (#5735)coord_radial() where full circles were not treated as such
(@teunbrand, #5750).NA is now detected
if the data contains values outside the given breaks (@teunbrand, #5749).annotate() now warns about stat or position arguments (@teunbrand, #5151)guide_coloursteps(even.steps = FALSE) now works with discrete data that has
been formatted by cut() (@teunbrand, #3877).ggsave() now offers to install svglite if needed (@eliocamp, #6166).This is a minor release that turned out quite beefy. It is focused on overhauling the guide system: the system responsible for displaying information from scales in the guise of axes and legends. As part of that overhaul, new guides have been implemented and existing guides have been refined. The look and feel of guides has been mostly preserved, but their internals and styling options have changed drastically.
Briefly summarising other highlights, we also welcome coord_radial() as a
successor of coord_polar(). Initial support for newer graphical features,
such as pattern fills has been added. The API has changed how I()/<AsIs>
vectors interact with the scale system, namely: not at all.
The guide system. As a whole. See 'new features' for more information.
While the S3 guide generics are still in place, the S3 methods for
guide_train(), guide_merge(), guide_geom(), guide_transform(),
guide_gengrob() have been superseded by the respective ggproto methods.
In practice, this will mean that NextMethod() or sub-classing ggplot2's
guides with the S3 system will no longer work.
By default, guide_legend() now only draws a key glyph for a layer when
the value is in the layer's data. To revert to the old behaviour, you
can still set show.legend = c({aesthetic} = TRUE) (@teunbrand, #3648).
In the scale_{colour/fill}_gradient2() and
scale_{colour/fill}_steps2() functions, the midpoint argument is
transformed by the scale transformation (#3198).
The legend.key theme element is set to inherit from the panel.background
theme element. The default themes no longer set the legend.key element.
This causes a visual change with the default theme_gray() (#5549).
The scale_name argument in continuous_scale(), discrete_scale() and
binned_scale() is soft-deprecated. If you have implemented custom scales,
be advised to double-check that unnamed arguments ends up where they should
(@teunbrand, #1312).
The legend.text.align and legend.title.align arguments in theme() are
deprecated. The hjust setting of the legend.text and legend.title
elements continues to fulfill the role of text alignment (@teunbrand, #5347).
'lines' units in geom_label(), often used in the label.padding argument,
are now are relative to the text size. This causes a visual change, but fixes
a misalignment issue between the textbox and text (@teunbrand, #4753)
coord_flip() has been marked as superseded. The recommended alternative is
to swap the x and y aesthetic and/or using the orientation argument in
a layer (@teunbrand, #5130).
The trans argument in scales and secondary axes has been renamed to
transform. The trans argument itself is deprecated. To access the
transformation from the scale, a new get_transformation() method is
added to Scale-classes (#5558).
Providing a numeric vector to theme(legend.position) has been deprecated.
To set the default legend position inside the plot use
theme(legend.position = "inside", legend.position.inside = c(...)) instead.
Plot scales now ignore AsIs objects constructed with I(x), instead of
invoking the identity scale. This allows these columns to co-exist with other
layers that need a non-identity scale for the same aesthetic. Also, it makes
it easy to specify relative positions (@teunbrand, #5142).
The fill aesthetic in many geoms now accepts grid's patterns and gradients.
For developers of layer extensions, this feature can be enabled by switching
from fill = alpha(fill, alpha) to fill = fill_alpha(fill, alpha) when
providing fills to grid::gpar() (@teunbrand, #3997).
New function check_device() for testing the availability of advanced
graphics features introduced in R 4.1.0 onward (@teunbrand, #5332).
coord_radial() is a successor to coord_polar() with more customisation
options. coord_radial() can:
guide_axis_theta() to
display the angle coordinate.end argument.donut
argument.angle aesthetic of layers, such as geom_text(), to align
with the coordinate system using the rotate_angle argument.The guide system encompassing axes and legends, as the last remaining chunk of
ggplot2, has been rewritten to use the <ggproto> system instead of the S3
system. This change was a necessary step to officially break open the guide
system for extension package developers. The axes and legends now inherit from
a <Guide> class, which makes them extensible in the same manner as geoms,
stats, facets and coords (#3329, @teunbrand)
The most user-facing change is that the styling of guides is rewired through
the theme system. Guides now have a theme argument that can style
individual guides, while theme() has gained additional arguments to style
guides. Theme elements declared in the guide override theme elements set
through the plot. The new theme elements for guides are:
legend.key.spacing{.x/.y}, legend.frame, legend.axis.line,
legend.ticks, legend.ticks.length, legend.text.position and
legend.title.position. Previous style options in the arguments of
guide_*() functions are soft-deprecated.
Unfortunately, we could not fully preserve the function of pre-existing
guide extensions written in the S3 system. A fallback for these old guides
is encapsulated in the <GuideOld> class, which calls the old S3 generics.
The S3 methods have been removed as part of cleaning up, so the old guides
will still work if the S3 methods are reimplemented, but we encourage to
switch to the new system (#2728).
The order argument of guides now strictly needs to be a length-1
integer (#4958).
New guide_axis_stack() to combine other axis guides on top of one another.
New guide_axis_theta() to draw an axis in a circular arc in
coord_radial(). The guide can be controlled by adding
guides(theta = guide_axis_theta(...)) to a plot.
New guide_axis_logticks() can be used to draw logarithmic tick marks as
an axis. It supersedes the annotation_logticks() function
(@teunbrand, #5325).
guide_axis() gains a minor.ticks argument to draw minor ticks (#4387).
guide_axis() gains a cap argument that can be used to trim the
axis line to extreme breaks (#4907).
Primary axis titles are now placed at the primary guide, so that
guides(x = guide_axis(position = "top")) will display the title at the
top by default (#4650).
The default vjust for the axis.title.y.right element is now 1 instead of
0.
Unknown secondary axis guide positions are now inferred as the opposite
of the primary axis guide when the latter has a known position (#4650).
New guide_custom() function for drawing custom graphical objects (grobs)
unrelated to scales in legend positions (#5416).
All legends have acquired a position argument, that allows individual guides
to deviate from the legend.position set in the theme() function. This
means that legends can now be placed at multiple sides of the plot (#5488).
The spacing between legend keys and their labels, in addition to legends
and their titles, is now controlled by the text's margin setting. Not
specifying margins will automatically add appropriate text margins. To
control the spacing within a legend between keys, the new
legend.key.spacing.{x/y} argument can be used in theme(). This leaves the
legend.spacing theme setting dedicated to solely controlling the spacing
between different guides (#5455).
guide_colourbar() and guide_coloursteps() gain an alpha argument to
set the transparency of the bar (#5085).
New display argument in guide_colourbar() supplants the raster argument.
In R 4.1.0 and above, display = "gradient" will draw a gradient.
Legend keys that can draw arrows have their size adjusted for arrows.
When legend titles are larger than the legend, title justification extends to the placement of keys and labels (#1903).
Glyph drawing functions of the draw_key_*() family can now set "width"
and "height" attributes (in centimetres) to the produced keys to control
their displayed size in the legend.
coord_sf() now uses customisable guides provided in the scales or
guides() function (@teunbrand).
guide_coloursteps(even.steps = FALSE) now draws one rectangle per interval
instead of many small ones (#5481).
draw_key_label() now better reflects the appearance of labels (#5561).
position_stack() no longer silently removes missing data, which is now
handled by the geom instead of position (#3532).
The minor_breaks function argument in scales can now also take a function
with two arguments: the scale's limits and the scale's major breaks (#3583).
Failing to fit or predict in stat_smooth() now gives a warning and omits
the failed group, instead of throwing an error (@teunbrand, #5352).
labeller() now handles unspecified entries from lookup tables
(@92amartins, #4599).
fortify.default() now accepts a data-frame-like object granted the object
exhibits healthy dim(), colnames(), and as.data.frame() behaviours
(@hpages, #5390).
geom_violin() gains a bounds argument analogous to geom_density()s
(@eliocamp, #5493).
To apply dodging more consistently in violin plots, stat_ydensity() now
has a drop argument to keep or discard groups with 1 observation.
geom_boxplot() gains a new argument, staplewidth that can draw staples
at the ends of whiskers (@teunbrand, #5126)
geom_boxplot() gains an outliers argument to switch outliers on or off,
in a manner that does affects the scale range. For hiding outliers that does
not affect the scale range, you can continue to use outlier.shape = NA
(@teunbrand, #4892).
Nicer error messages for xlim/ylim arguments in coord-* functions (@92amartins, #4601, #5297).
You can now omit either xend or yend from geom_segment() as only one
of these is now required. If one is missing, it will be filled from the x
and y aesthetics respectively. This makes drawing horizontal or vertical
segments a little bit more convenient (@teunbrand, #5140).
When geom_path() has aesthetics varying within groups, the arrow() is
applied to groups instead of individual segments (@teunbrand, #4935).
geom_text() and geom_label() gained a size.unit parameter that set the
text size to millimetres, points, centimetres, inches or picas
(@teunbrand, #3799).
geom_label() now uses the angle aesthetic (@teunbrand, #2785)
The label.padding argument in geom_label() now supports inputs created
with the margin() function (#5030).
ScaleContinuous$get_breaks() now only calls scales::zero_range() on limits
in transformed space, rather than in data space (#5304).
Scales throw more informative messages (@teunbrand, #4185, #4258)
scale_*_manual() with a named values argument now emits a warning when
none of those names match the values found in the data (@teunbrand, #5298).
The name argument in most scales is now explicitly the first argument
(#5535)
The translate_shape_string() internal function is now exported for use in
extensions of point layers (@teunbrand, #5191).
To improve width calculation in bar plots with empty factor levels,
resolution() considers mapped_discrete values as having resolution 1
(@teunbrand, #5211)
In theme(), some elements can be specified with rel() to inherit from
unit-class objects in a relative fashion (@teunbrand, #3951).
theme() now supports splicing a list of arguments (#5542).
In the theme element hierarchy, parent elements that are a strict subclass of child elements now confer their subclass upon the children (#5457).
New plot.tag.location in theme() can control placement of the plot tag
in the "margin", "plot" or the new "panel" option (#4297).
coord_munch() can now close polygon shapes (@teunbrand, #3271)
Aesthetics listed in geom_*() and stat_*() layers now point to relevant
documentation (@teunbrand, #5123).
The new argument axes in facet_grid() and facet_wrap() controls the
display of axes at interior panel positions. Additionally, the axis.labels
argument can be used to only draw tick marks or fully labelled axes
(@teunbrand, #4064).
coord_polar() can have free scales in facets (@teunbrand, #2815).
The get_guide_data() function can be used to extract position and label
information from the plot (#5004).
Improve performance of layers without positional scales (@zeehio, #4990)
More informative error for mismatched
direction/theme(legend.direction = ...) arguments (#4364, #4930).
Fixed regression in guide_legend() where the linewidth key size
wasn't adapted to the width of the lines (#5160).
In guide_bins(), the title no longer arbitrarily becomes offset from
the guide when it has long labels.
guide_colourbar() and guide_coloursteps() merge properly when one
of the aesthetics is dropped (#5324).
When using geom_dotplot(binaxis = "x") with a discrete y-variable, dots are
now stacked from the y-position rather than from 0 (@teunbrand, #5462)
stat_count() treats x as unique in the same manner unique() does
(#4609).
The plot's title, subtitle and caption now obey horizontal text margins (#5533).
Contour functions will not fail when options("OutDec") is not . (@eliocamp, #5555).
Lines where linewidth = NA are now dropped in geom_sf() (#5204).
ggsave() no longer sometimes creates new directories, which is now
controlled by the new create.dir argument (#5489).
Legend titles no longer take up space if they've been removed by setting
legend.title = element_blank() (@teunbrand, #3587).
resolution() has a small tolerance, preventing spuriously small resolutions
due to rounding errors (@teunbrand, #2516).
stage() now works correctly, even with aesthetics that do not have scales
(#5408)
stat_ydensity() with incomplete groups calculates the default width
parameter more stably (@teunbrand, #5396)
The size argument in annotation_logticks() has been deprecated in favour
of the linewidth argument (#5292).
Binned scales now treat NAs in limits the same way continuous scales do
(#5355).
Binned scales work better with trans = "reverse" (#5355).
Integers are once again valid input to theme arguments that expect numeric input (@teunbrand, #5369)
Legends in scale_*_manual() can show NA values again when the values is
a named vector (@teunbrand, #5214, #5286).
Fixed bug in coord_sf() where graticule lines didn't obey
panel.grid.major's linewidth setting (@teunbrand, #5179)
Fixed bug in annotation_logticks() when no suitable tick positions could
be found (@teunbrand, #5248).
The default width of geom_bar() is now based on panel-wise resolution of
the data, rather than global resolution (@teunbrand, #4336).
stat_align() is now applied per panel instead of globally, preventing issues
when facets have different ranges (@teunbrand, #5227).
A stacking bug in stat_align() was fixed (@teunbrand, #5176).
stat_contour() and stat_contour_filled() now warn about and remove
duplicated coordinates (@teunbrand, #5215).
guide_coloursteps() and guide_bins() sort breaks (#5152).
The ScaleContinuous$get_breaks() method no longer censors
the computed breaks.
The ggplot object now contains $layout which points to the Layout ggproto
object and will be used by the ggplot_build.ggplot method. This was exposed
so that package developers may extend the behaviour of the Layout ggproto
object without needing to develop an entirely new ggplot_build method
(@jtlandis, #5077).
Guide building is now part of ggplot_build() instead of
ggplot_gtable() to allow guides to observe unmapped data (#5483).
The titleGrob() function has been refactored to be faster and less
complicated.
The scales_*() functions related to managing the <ScalesList> class have
been implemented as methods in the <ScalesList> class, rather than stray
functions (#1310).
This hotfix release adapts to a change in r-devel's base::is.atomic() and
the upcoming retirement of maptools.
fortify() for sp objects (e.g., SpatialPolygonsDataFrame) is now deprecated
and will be removed soon in support of the upcoming retirement of rgdal, rgeos,
and maptools. In advance
of the whole removal, fortify(<SpatialPolygonsDataFrame>, region = ...)
no longer works as of this version (@yutannihilation, #5244).This hotfix release addresses a version comparison change in r-devel. There are no user-facing or breaking changes.
This is a hotfix release anticipating changes in r-devel, but folds in upkeep changes and a few bug fixes as well.
Various type checks and their messages have been standardised (@teunbrand, #4834).
ggplot2 now uses scales::DiscreteRange and scales::ContinuousRange, which
are available to write scale extensions from scratch (@teunbrand, #2710).
The layer_data(), layer_scales() and layer_grob() now have the default
plot = last_plot() (@teunbrand, #5166).
The datetime_scale() scale constructor is now exported for use in extension
packages (@teunbrand, #4701).
update_geom_defaults() and update_stat_defaults() now return properly
classed objects and have updated docs (@dkahle, #5146).
For the purposes of checking required or non-missing aesthetics, character vectors are no longer considered non-finite (@teunbrand, @4284).
annotation_logticks() skips drawing ticks when the scale range is non-finite
instead of throwing an error (@teunbrand, #5229).
Fixed spurious warnings when the weight was used in stat_bin_2d(),
stat_boxplot(), stat_contour(), stat_bin_hex() and stat_quantile()
(@teunbrand, #5216).
To prevent changing the plotting order, stat_sf() is now computed per panel
instead of per group (@teunbrand, #4340).
Fixed bug in coord_sf() where graticule lines didn't obey
panel.grid.major's linewidth setting (@teunbrand, #5179).
geom_text() drops observations where angle = NA instead of throwing an
error (@teunbrand, #2757).
This is a small release focusing on fixing regressions in the 3.4.0 release and minor polishes.
y in stat_ecdf() has been superseded by ecdf to
prevent incorrect scale transformations (@teunbrand, #5113 and #5112).Added scale_linewidth_manual() and scale_linewidth_identity() to support
the linewidth aesthetic (@teunbrand, #5050).
ggsave() warns when multiple filenames are given, and only writes to the
first file (@teunbrand, #5114).
Fixed a regression in geom_hex() where aesthetics were replicated across
bins (@thomasp85, #5037 and #5044).
Using two ordered factors as facetting variables in
facet_grid(..., as.table = FALSE) now throws a warning instead of an
error (@teunbrand, #5109).
Fixed misbehaviour of draw_key_boxplot() and draw_key_crossbar() with
skewed key aspect ratio (@teunbrand, #5082).
Fixed spurious warning when weight aesthetic was used in stat_smooth()
(@teunbrand based on @clauswilke's suggestion, #5053).
The lwd alias is now correctly replaced by linewidth instead of size
(@teunbrand based on @clauswilke's suggestion #5051).
Fixed a regression in Coord$train_panel_guides() where names of guides were
dropped (@maxsutton, #5063).
In binned scales:
Automatic breaks should no longer be out-of-bounds, and automatic limits are adjusted to include breaks (@teunbrand, #5082).
Zero-range limits no longer throw an error and are treated akin to continuous scales with zero-range limits (@teunbrand, #5066).
The trans = "date" and trans = "time" transformations were made compatible
(@teunbrand, #4217).
This is a minor release focusing on tightening up the internals and ironing out
some inconsistencies in the API. The biggest change is the addition of the
linewidth aesthetic that takes of sizing the width of any line from size.
This change, while attempting to be as non-breaking as possible, has the
potential to change the look of some of your plots.
Other notable changes is a complete redo of the error and warning messaging in ggplot2 using the cli package. Messaging is now better contextualised and it should be easier to identify which layer an error is coming from. Last, we have now made the switch to using the vctrs package internally which means that support for vctrs classes as variables should improve, along with some small gains in rendering speed.
A linewidth aesthetic has been introduced and supersedes the size
aesthetic for scaling the width of lines in line based geoms. size will
remain functioning but deprecated for these geoms and it is recommended to
update all code to reflect the new aesthetic. For geoms that have both point
sizing and linewidth sizing (geom_pointrange() and geom_sf) size now
only refers to sizing of points which can leads to a visual change in old
code (@thomasp85, #3672)
The default line width for polygons in geom_sf() have been decreased to 0.2
to reflect that this is usually used for demarking borders where a thinner
line is better suited. This change was made since we already induced a
visual change in geom_sf() with the introduction of the linewidth
aesthetic.
The dot-dot notation (..var..) and stat(), which have been superseded by
after_stat(), are now formally deprecated (@yutannihilation, #3693).
qplot() is now formally deprecated (@yutannihilation, #3956).
stage() now properly refers to the values without scale transformations for
the stage of after_stat. If your code requires the scaled version of the
values for some reason, you have to apply the same transformation by yourself,
e.g. sqrt() for scale_{x,y}_sqrt() (@yutannihilation and @teunbrand, #4155).
Use rlang::hash() instead of digest::digest(). This update may lead to
changes in the automatic sorting of legends. In order to enforce a specific
legend order use the order argument in the guide. (@thomasp85, #4458)
referring to x in backquoted expressions with label_bquote() is no longer
possible.
The ticks.linewidth and frame.linewidth parameters of guide_colourbar()
are now multiplied with .pt like elsewhere in ggplot2. It can cause visual
changes when these arguments are not the defaults and these changes can be
restored to their previous behaviour by adding / .pt (@teunbrand #4314).
scale_*_viridis_b() now uses the full range of the viridis scales
(@gregleleu, #4737)
geom_col() and geom_bar() gain a new just argument. This is set to 0.5
by default; use just = 0/just = 1 to place columns on the left/right
of the axis breaks.
(@wurli, #4899)
geom_density() and stat_density() now support bounds argument
to estimate density with boundary correction (@echasnovski, #4013).
ggplot now checks during statistical transformations whether any data
columns were dropped and warns about this. If stats intend to drop
data columns they can declare them in the new field dropped_aes.
(@clauswilke, #3250)
... supports rlang::list2 dynamic dots in all public functions.
(@mone27, #4764)
theme() now has a strip.clip argument, that can be set to "off" to
prevent the clipping of strip text and background borders (@teunbrand, #4118)
geom_contour() now accepts a function in the breaks argument
(@eliocamp, #4652).
Fix a bug in position_jitter() where infinity values were dropped (@javlon,
#4790).
geom_linerange() now respects the na.rm argument (#4927, @thomasp85)
Improve the support for guide_axis() on coord_trans()
(@yutannihilation, #3959)
Added stat_align() to align data without common x-coordinates prior to
stacking. This is now the default stat for geom_area() (@thomasp85, #4850)
Fix a bug in stat_contour_filled() where break value differences below a
certain number of digits would cause the computations to fail (@thomasp85,
#4874)
Secondary axis ticks are now positioned more precisely, removing small visual artefacts with alignment between grid and ticks (@thomasp85, #3576)
Improve stat_function documentation regarding xlim argument.
(@92amartins, #4474)
Fix various issues with how labels, breaks, limits, and show.limits
interact in the different binning guides (@thomasp85, #4831)
Automatic break calculation now squishes the scale limits to the domain
of the transformation. This allows scale_{x/y}_sqrt() to find breaks at 0
when appropriate (@teunbrand, #980).
Using multiple modified aesthetics correctly will no longer trigger warnings.
If used incorrectly, the warning will now report the duplicated aesthetic
instead of NA (@teunbrand, #4707).
aes() now supports the !!! operator in its first two arguments
(#2675). Thanks to @yutannihilation and @teunbrand for draft
implementations.
Require rlang >= 1.0.0 (@billybarc, #4797)
geom_violin() no longer issues "collapsing to unique 'x' values" warning
(@bersbersbers, #4455)
annotate() now documents unsupported geoms (geom_abline(), geom_hline()
and geom_vline()), and warns when they are requested (@mikmart, #4719)
presidential dataset now includes Trump's presidency (@bkmgit, #4703).
position_stack() now works fully with geom_text() (@thomasp85, #4367)
geom_tile() now correctly recognises missing data in xmin, xmax, ymin,
and ymax (@thomasp85 and @sigmapi, #4495)
geom_hex() will now use the binwidth from stat_bin_hex() if present,
instead of deriving it (@thomasp85, #4580)
geom_hex() now works on non-linear coordinate systems (@thomasp85)
Fixed a bug throwing errors when trying to render an empty plot with secondary axes (@thomasp85, #4509)
Axes are now added correctly in facet_wrap() when as.table = FALSE
(@thomasp85, #4553)
Better compatibility of custom device functions in ggsave()
(@thomasp85, #4539)
Binning scales are now more resilient to calculated limits that ends up being
NaN after transformations (@thomasp85, #4510)
Strip padding in facet_grid() is now only in effect if
strip.placement = "outside" and an axis is present between the strip and
the panel (@thomasp85, #4610)
Aesthetics of length 1 are now recycled to 0 if the length of the data is 0 (@thomasp85, #4588)
Setting size = NA will no longer cause guide_legend() to error
(@thomasp85, #4559)
Setting stroke to NA in geom_point() will no longer impair the sizing of
the points (@thomasp85, #4624)
stat_bin_2d() now correctly recognises the weight aesthetic
(@thomasp85, #4646)
All geoms now have consistent exposure of linejoin and lineend parameters, and the guide keys will now respect these settings (@thomasp85, #4653)
geom_sf() now respects arrow parameter for lines (@jakeruss, #4659)
Updated documentation for print.ggplot to reflect that it returns
the original plot, not the result of ggplot_build(). (@r2evans, #4390)
scale_*_manual() no longer displays extra legend keys, or changes their
order, when a named values argument has more items than the data. To display
all values on the legend instead, use
scale_*_manual(values = vals, limits = names(vals)). (@teunbrand, @banfai,
#4511, #4534)
Updated documentation for geom_contour() to correctly reflect argument
precedence between bins and binwidth. (@eliocamp, #4651)
Dots in geom_dotplot() are now correctly aligned to the baseline when
stackratio != 1 and stackdir != "up" (@mjskay, #4614)
Key glyphs for geom_boxplot(), geom_crossbar(), geom_pointrange(), and
geom_linerange() are now orientation-aware (@mjskay, #4732)
Updated documentation for geom_smooth() to more clearly describe effects of
the fullrange parameter (@thoolihan, #4399).
This is a very small release only applying an internal change to comply with
R 4.2 and its deprecation of default.stringsAsFactors(). There are no user
facing changes and no breaking changes.
This is a very small release focusing on fixing a couple of untenable issues that surfaced with the 3.3.4 release
geom_abline())
as it introduced undesirable issues far worse than the bug it fixed
(@thomasp85, #4514)ggsave() when producing emf/wmf files (@yutannihilation,
#4521)coord_sf() was reporting that it is non-linear
even when data is provided in projected coordinates (@clauswilke, #4527)This is a larger patch release fixing a huge number of bugs and introduces a small selection of feature refinements.
Alt-text can now be added to a plot using the alt label, i.e
+ labs(alt = ...). Currently this alt text is not automatically propagated,
but we plan to integrate into Shiny, RMarkdown, and other tools in the future.
(@thomasp85, #4477)
Add support for the BrailleR package for creating descriptions of the plot when rendered (@thomasp85, #4459)
coord_sf() now has an argument default_crs that specifies the coordinate
reference system (CRS) for non-sf layers and scale/coord limits. This argument
defaults to NULL, which means non-sf layers are assumed to be in projected
coordinates, as in prior ggplot2 versions. Setting default_crs = sf::st_crs(4326)
provides a simple way to interpret x and y positions as longitude and latitude,
regardless of the CRS used by coord_sf(). Authors of extension packages
implementing stat_sf()-like functionality are encouraged to look at the source
code of stat_sf()'s compute_group() function to see how to provide scale-limit
hints to coord_sf() (@clauswilke, #3659).
ggsave() now uses ragg to render raster output if ragg is available. It also
handles custom devices that sets a default unit (e.g. ragg::agg_png)
correctly (@thomasp85, #4388)
ggsave() now returns the saved file location invisibly (#3379, @eliocamp).
Note that, as a side effect, an unofficial hack <ggplot object> + ggsave()
no longer works (#4513).
The scale arguments limits, breaks, minor_breaks, labels, rescaler
and oob now accept purrr style lambda notation (@teunbrand, #4427). The same
is true for as_labeller() (and therefore also labeller())
(@netique, #4188).
Manual scales now allow named vectors passed to values to contain fewer
elements than existing in the data. Elements not present in values will be set
to NA (@thomasp85, #3451)
Date and datetime position scales support out-of-bounds (oob) arguments to control how limits affect data outside those limits (@teunbrand, #4199).
Fix a bug that after_stat() and after_scale() cannot refer to aesthetics
if it's specified in the plot-global mapping (@yutannihilation, #4260).
Fix bug in annotate_logticks() that would cause an error when used together
with coord_flip() (@thomasp85, #3954)
Fix a bug in geom_abline() that resulted in intercept not being subjected
to the transformation of the y scale (@thomasp85, #3741)
Extent the range of the line created by geom_abline() so that line ending
is not visible for large linewidths (@thomasp85, #4024)
Fix bug in geom_dotplot() where dots would be positioned wrong with
stackgroups = TRUE (@thomasp85, #1745)
Fix calculation of confidence interval for locfit smoothing in geom_smooth()
(@topepo, #3806)
Fix bug in geom_text() where "outward" and "inward" justification for
some angle values was reversed (@aphalo, #4169, #4447)
ggsave() now sets the default background to match the fill value of the
plot.background theme element (@karawoo, #4057)
It is now deprecated to specify guides(<scale> = FALSE) or
scale_*(guide = FALSE) to remove a guide. Please use
guides(<scale> = "none") or scale_*(guide = "none") instead
(@yutannihilation, #4097)
Fix a bug in guide_bins() where keys would disappear if the guide was
reversed (@thomasp85, #4210)
Fix bug in guide_coloursteps() that would repeat the terminal bins if the
breaks coincided with the limits of the scale (@thomasp85, #4019)
Make sure that default labels from default mappings doesn't overwrite default labels from explicit mappings (@thomasp85, #2406)
Fix bug in labeller() where parsing was turned off if .multiline = FALSE
(@thomasp85, #4084)
Make sure label_bquote() has access to the calling environment when
evaluating the labels (@thomasp85, #4141)
Fix a bug in the layer implementation that introduced a new state after the first render which could lead to a different look when rendered the second time (@thomasp85, #4204)
Fix a bug in legend justification where justification was lost of the legend dimensions exceeded the available size (@thomasp85, #3635)
Fix a bug in position_dodge2() where NA values in thee data would cause an
error (@thomasp85, #2905)
Make sure position_jitter() creates the same jittering independent of
whether it is called by name or with constructor (@thomasp85, #2507)
Fix a bug in position_jitter() where different jitters would be applied to
different position aesthetics of the same axis (@thomasp85, #2941)
Fix a bug in qplot() when supplying c(NA, NA) as axis limits
(@thomasp85, #4027)
Remove cross-inheritance of default discrete colour/fill scales and check the
type and aesthetic of function output if type is a function
(@thomasp85, #4149)
Fix bug in scale_[x|y]_date() where custom breaks functions that resulted in
fractional dates would get misaligned (@thomasp85, #3965)
Fix bug in scale_[x|y]_datetime() where a specified timezone would be
ignored by the scale (@thomasp85, #4007)
Fix issue in sec_axis() that would throw warnings in the absence of any
secondary breaks (@thomasp85, #4368)
stat_bin()'s computed variable width is now documented (#3522).
stat_count() now computes width based on the full dataset instead of per
group (@thomasp85, #2047)
Extended stat_ecdf() to calculate the cdf from either x or y instead from y
only (@jgjl, #4005)
Fix a bug in stat_summary_bin() where one more than the requested number of
bins would be created (@thomasp85, #3824)
Only drop groups in stat_ydensity() when there are fewer than two data
points and throw a warning (@andrewwbutler, #4111).
Fixed a bug in strip assembly when theme has strip.text = element_blank()
and plots are faceted with multi-layered strips (@teunbrand, #4384).
Using theme(aspect.ratio = ...) together with free space in facet_grid()
now correctly throws an error (@thomasp85, #3834)
Fixed a bug in labeller() so that .default is passed to as_labeller()
when labellers are specified by naming faceting variables. (@waltersom, #4031)
ggplot2 now requires R >= 3.3 (#4247).
ggplot2 now uses rlang::check_installed() to check if a suggested package is
installed, which will offer to install the package before continuing (#4375,
@malcolmbarrett)
Improved error with hint when piping a ggplot object into a facet function
(#4379, @mitchelloharawild).
This is a small patch release mainly intended to address changes in R and CRAN. It further changes the licensing model of ggplot2 to an MIT license.
Update the ggplot2 licence to an MIT license (#4231, #4232, #4233, and #4281)
Use vdiffr conditionally so ggplot2 can be tested on systems without vdiffr
Update tests to work with the new all.equal() defaults in R >4.0.3
Fixed a bug that guide_bins() mistakenly ignore override.aes argument
(@yutannihilation, #4085).
This is a small release focusing on fixing regressions introduced in 3.3.1.
Added an outside option to annotation_logticks() that places tick marks
outside of the plot bounds. (#3783, @kbodwin)
annotation_raster() adds support for native rasters. For large rasters,
native rasters render significantly faster than arrays (@kent37, #3388)
Facet strips now have dedicated position-dependent theme elements
(strip.text.x.top, strip.text.x.bottom, strip.text.y.left,
strip.text.y.right) that inherit from strip.text.x and strip.text.y,
respectively. As a consequence, some theme stylings now need to be applied to
the position-dependent elements rather than to the parent elements. This
change was already introduced in ggplot2 3.3.0 but not listed in the
changelog. (@thomasp85, #3683)
Facets now handle layers containing no data (@yutannihilation, #3853).
A newly added geom geom_density_2d_filled() and associated stat
stat_density_2d_filled() can draw filled density contours
(@clauswilke, #3846).
A newly added geom_function() is now recommended to use in conjunction
with/instead of stat_function(). In addition, stat_function() now
works with transformed y axes, e.g. scale_y_log10(), and in plots
containing no other data or layers (@clauswilke, #3611, #3905, #3983).
Fixed a bug in geom_sf() that caused problems with legend-type
autodetection (@clauswilke, #3963).
Support graphics devices that use the file argument instead of fileneame
in ggsave() (@bwiernik, #3810)
Default discrete color scales are now configurable through the options() of
ggplot2.discrete.colour and ggplot2.discrete.fill. When set to a character
vector of colour codes (or list of character vectors) with sufficient length,
these colours are used for the default scale. See help(scale_colour_discrete)
for more details and examples (@cpsievert, #3833).
Default continuous colour scales (i.e., the options()
ggplot2.continuous.colour and ggplot2.continuous.fill, which inform the
type argument of scale_fill_continuous() and scale_colour_continuous())
now accept a function, which allows more control over these default
continuous_scale()s (@cpsievert, #3827).
A bug was fixed in stat_contour() when calculating breaks based on
the bins argument (@clauswilke, #3879, #4004).
Data columns can now contain Vector S4 objects, which are widely used in the
Bioconductor project. (@teunbrand, #3837)
This is a small release with no code change. It removes all malicious links to a site that got hijacked from the readme and pkgdown site.
This is a minor release but does contain a range of substantial new features, along with the standard bug fixes. The release contains a few visual breaking changes, along with breaking changes for extension developers due to a shift in internal representation of the position scales and their axes. No user breaking changes are included.
This release also adds Dewey Dunnington (@paleolimbot) to the core team.
There are no user-facing breaking changes, but a change in some internal representations that extension developers may have relied on, along with a few breaking visual changes which may cause visual tests in downstream packages to fail.
The panel_params field in the Layout now contains a list of list of
ViewScale objects, describing the trained coordinate system scales, instead
of the list object used before. Any extensions that use this field will likely
break, as will unit tests that checks aspects of this.
element_text() now issues a warning when vectorized arguments are provided,
as in colour = c("red", "green", "blue"). Such use is discouraged and not
officially supported (@clauswilke, #3492).
Changed theme_grey() setting for legend key so that it creates no border
(NA) rather than drawing a white one. (@annennenne, #3180)
geom_ribbon() now draws separate lines for the upper and lower intervals if
colour is mapped. Similarly, geom_area() and geom_density() now draw
the upper lines only in the same case by default. If you want old-style full
stroking, use outline.type = "full" (@yutannihilation, #3503 / @thomasp85, #3708).
The evaluation time of aesthetics can now be controlled to a finer degree.
after_stat() supersedes the use of stat() and ..var..-notation, and is
joined by after_scale() to allow for mapping to scaled aesthetic values.
Remapping of the same aesthetic is now supported with stage(), so you can
map a data variable to a stat aesthetic, and remap the same aesthetic to
something else after statistical transformation (@thomasp85, #3534)
All coord_*() functions with xlim and ylim arguments now accept
vectors with NA as a placeholder for the minimum or maximum value
(e.g., ylim = c(0, NA) would zoom the y-axis from 0 to the
maximum value observed in the data). This mimics the behaviour
of the limits argument in continuous scale functions
(@paleolimbot, #2907).
Allowed reversing of discrete scales by re-writing get_limits()
(@AnneLyng, #3115)
All geoms and stats that had a direction (i.e. where the x and y axes had
different interpretation), can now freely choose their direction, instead of
relying on coord_flip(). The direction is deduced from the aesthetic
mapping, but can also be specified directly with the new orientation
argument (@thomasp85, #3506).
Position guides can now be customized using the new guide_axis(), which can
be passed to position scale_*() functions or via guides(). The new axis
guide (guide_axis()) comes with arguments check.overlap (automatic removal
of overlapping labels), angle (easy rotation of axis labels), and
n.dodge (dodge labels into multiple rows/columns) (@paleolimbot, #3322).
A new scale type has been added, that allows binning of aesthetics at the
scale level. It has versions for both position and non-position aesthetics and
comes with two new guides (guide_bins and guide_coloursteps)
(@thomasp85, #3096)
scale_x_continuous() and scale_y_continuous() gains an n.breaks argument
guiding the number of automatic generated breaks (@thomasp85, #3102)
Added stat_contour_filled() and geom_contour_filled(), which compute
and draw filled contours of gridded data (@paleolimbot, #3044).
geom_contour() and stat_contour() now use the isoband package
to compute contour lines. The complete parameter (which was undocumented
and has been unused for at least four years) was removed (@paleolimbot, #3044).
Themes have gained two new parameters, plot.title.position and
plot.caption.position, that can be used to customize how plot
title/subtitle and plot caption are positioned relative to the overall plot
(@clauswilke, #3252).
Geom now gains a setup_params() method in line with the other ggproto
classes (@thomasp85, #3509)
The newly added function register_theme_elements() now allows developers
of extension packages to define their own new theme elements and place them
into the ggplot2 element tree (@clauswilke, #2540).
coord_trans() now draws second axes and accepts xlim, ylim,
and expand arguments to bring it up to feature parity with
coord_cartesian(). The xtrans and ytrans arguments that were
deprecated in version 1.0.1 in favour of x and y
were removed (@paleolimbot, #2990).
coord_trans() now calculates breaks using the expanded range
(previously these were calculated using the unexpanded range,
which resulted in differences between plots made with coord_trans()
and those made with coord_cartesian()). The expansion for discrete axes
in coord_trans() was also updated such that it behaves identically
to that in coord_cartesian() (@paleolimbot, #3338).
expand_scale() was deprecated in favour of expansion() for setting
the expand argument of x and y scales (@paleolimbot).
geom_abline(), geom_hline(), and geom_vline() now issue
more informative warnings when supplied with set aesthetics
(i.e., slope, intercept, yintercept, and/or xintercept)
and mapped aesthetics (i.e., data and/or mapping).
Fix a bug in geom_raster() that squeezed the image when it went outside
scale limits (#3539, @thomasp85)
geom_sf() now determines the legend type automatically (@microly, #3646).
geom_sf() now removes rows that can't be plotted due to NA aesthetics
(#3546, @thomasp85)
geom_sf() now applies alpha to linestring geometries
(#3589, @yutannihilation).
Added function ggplot_add.by() for lists created with by(), allowing such
lists to be added to ggplot objects (#2734, @Maschette)
ggplot2 no longer depends on reshape2, which means that it no longer (recursively) needs plyr, stringr, or stringi packages.
Increase the default nbin of guide_colourbar() to place the ticks more
precisely (#3508, @yutannihilation).
manual_scale() now matches values with the order of breaks whenever
values is an unnamed vector. Previously, unnamed values would match with
the limits of the scale and ignore the order of any breaks provided. Note
that this may change the appearance of plots that previously relied on the
unordered behaviour (#2429, @idno0001).
scale_manual_*(limits = ...) now actually limits the scale (#3262,
@yutannihilation).
Fix a bug when show.legend is a named logical vector
(#3461, @yutannihilation).
Added weight aesthetic option to stat_density() and made scaling of
weights the default (@annennenne, #2902)
stat_density2d() can now take an adjust parameter to scale the default
bandwidth. (#2860, @haleyjeppson)
stat_smooth() uses REML by default, if method = "gam" and
gam's method is not specified (@ikosmidis, #2630).
stacking text when calculating the labels and the y axis with
stat_summary() now works (@ikosmidis, #2709)
stat_summary() and related functions now support rlang-style lambda functions
(#3568, @dkahle).
The data mask pronoun, .data, is now stripped from default labels.
Addition of partial themes to plots has been made more predictable; stepwise addition of individual partial themes is now equivalent to addition of multple theme elements at once (@clauswilke, #3039).
Facets now don't fail even when some variable in the spec are not available in all layers (@yutannihilation, #2963).
This is a patch release fixing a few regressions introduced in 3.2.0 as well as fixing some unit tests that broke due to upstream changes.
position_stack() no longer changes the order of the input data. Changes to
the internal behaviour of geom_ribbon() made this reordering problematic
with ribbons that spanned y = 0 (#3471)qplot() with a single positional aesthetic will no longer title the
non-specified scale as "NULL" (#3473)This is a minor release with an emphasis on internal changes to make ggplot2 faster and more consistent. The few interface changes will only affect the aesthetics of the plot in minor ways, and will only potentially break code of extension developers if they have relied on internals that have been changed. This release also sees the addition of Hiroaki Yutani (@yutannihilation) to the core developer team.
With the release of R 3.6, ggplot2 now requires the R version to be at least 3.2, as the tidyverse is committed to support 5 major versions of R.
Two patches (#2996 and #3050) fixed minor rendering problems. In most cases, the visual changes are so subtle that they are difficult to see with the naked eye. However, these changes are detected by the vdiffr package, and therefore any package developers who use vdiffr to test for visual correctness of ggplot2 plots will have to regenerate all reference images.
In some cases, ggplot2 now produces a warning or an error for code that previously
produced plot output. In all these cases, the previous plot output was accidental,
and the plotting code uses the ggplot2 API in a way that would lead to undefined
behavior. Examples include a missing group aesthetic in geom_boxplot() (#3316),
annotations across multiple facets (#3305), and not using aesthetic mappings when
drawing ribbons with geom_ribbon() (#3318).
This release includes a range of internal changes that speeds up plot generation. None of the changes are user facing and will not break any code, but in general ggplot2 should feel much faster. The changes includes, but are not limited to:
Caching ascent and descent dimensions of text to avoid recalculating it for every title.
Using a faster data.frame constructor as well as faster indexing into data.frames
Removing the plyr dependency, replacing plyr functions with faster equivalents.
geom_polygon() can now draw polygons with holes using the new subgroup
aesthetic. This functionality requires R 3.6.0 (@thomasp85, #3128)
Aesthetic mappings now accept functions that return NULL (@yutannihilation,
#2997).
stat_function() now accepts rlang/purrr style anonymous functions for the
fun parameter (@dkahle, #3159).
geom_rug() gains an "outside" option to allow for moving the rug tassels to
outside the plot area (@njtierney, #3085) and a length option to allow for
changing the length of the rug lines (@daniel-wells, #3109).
All geoms now take a key_glyph paramter that allows users to customize
how legend keys are drawn (@clauswilke, #3145). In addition, a new key glyph
timeseries is provided to draw nice legends for time series
(@mitchelloharawild, #3145).
Layers now have a new member function setup_layer() which is called at the
very beginning of the plot building process and which has access to the
original input data and the plot object being built. This function allows the
creation of custom layers that autogenerate aesthetic mappings based on the
input data or that filter the input data in some form. For the time being, this
feature is not exported, but it has enabled the development of a new layer type,
layer_sf() (see next item). Other special-purpose layer types may be added
in the future (@clauswilke, #2872).
A new layer type layer_sf() can auto-detect and auto-map sf geometry
columns in the data. It should be used by extension developers who are writing
new sf-based geoms or stats (@clauswilke, #3232).
x0 and y0 are now recognized positional aesthetics so they will get scaled
if used in extension geoms and stats (@thomasp85, #3168)
Continuous scale limits now accept functions which accept the default limits and return adjusted limits. This makes it possible to write a function that e.g. ensures the limits are always a multiple of 100, regardless of the data (@econandrew, #2307).
cut_width() now accepts ... to pass further arguments to base::cut.default()
like cut_number() and cut_interval() already did (@cderv, #3055)
coord_map() now can have axes on the top and right (@karawoo, #3042).
coord_polar() now correctly rescales the secondary axis (@linzi-sg, #3278)
coord_sf(), coord_map(), and coord_polar() now squash -Inf and Inf
into the min and max of the plot (@yutannihilation, #2972).
coord_sf() graticule lines are now drawn in the same thickness as panel grid
lines in coord_cartesian(), and seting panel grid lines to element_blank()
now also works in coord_sf()
(@clauswilke, #2991, #2525).
economics data has been regenerated. This leads to some changes in the
values of all columns (especially in psavert), but more importantly, strips
the grouping attributes from economics_long.
element_line() now fills closed arrows (@yutannihilation, #2924).
Facet strips on the left side of plots now have clipping turned on, preventing text from running out of the strip and borders from looking thicker than for other strips (@karawoo, #2772 and #3061).
ggplot2 now works in Turkish locale (@yutannihilation, #3011).
Clearer error messages for inappropriate aesthetics (@clairemcwhite, #3060).
ggplot2 no longer attaches any external packages when using functions that
depend on packages that are suggested but not imported by ggplot2. The
affected functions include geom_hex(), stat_binhex(),
stat_summary_hex(), geom_quantile(), stat_quantile(), and map_data()
(@clauswilke, #3126).
geom_area() and geom_ribbon() now sort the data along the x-axis in the
setup_data() method rather than as part of draw_group() (@thomasp85,
#3023)
geom_hline(), geom_vline(), and geom_abline() now throw a warning if the
user supplies both an xintercept, yintercept, or slope value and a
mapping (@RichardJActon, #2950).
geom_violin() no longer throws an error when quantile lines fall outside
the violin polygon (@thomasp85, #3254).
guide_legend() and guide_colorbar() now use appropriate spacing between legend
key glyphs and legend text even if the legend title is missing (@clauswilke, #2943).
Default labels are now generated more consistently; e.g., symbols no longer
get backticks, and long expressions are abbreviated with ...
(@yutannihilation, #2981).
All-Inf layers are now ignored for picking the scale (@yutannihilation,
#3184).
Diverging Brewer colour palette now use the correct mid-point colour (@dariyasydykova, #3072).
scale_color_continuous() now points to scale_colour_continuous() so that
it will handle type = "viridis" as the documentation states (@hlendway,
#3079).
scale_shape_identity() now works correctly with guide = "legend"
(@malcolmbarrett, #3029)
scale_continuous will now draw axis line even if the length of breaks is 0
(@thomasp85, #3257)
stat_bin() will now error when the number of bins exceeds 1e6 to avoid
accidentally freezing the user session (@thomasp85).
sec_axis() now places ticks accurately when using nonlinear transformations (@dpseidel, #2978).
facet_wrap() and facet_grid() now automatically remove NULL from facet
specs, and accept empty specs (@yutannihilation, #3070, #2986).
stat_bin() now handles data with only one unique value (@yutannihilation
#3047).
sec_axis() now accepts functions as well as formulas (@yutannihilation, #3031).
New theme elements allowing different ticks lengths for each axis. For instance,
this can be used to have inwards ticks on the x-axis (axis.ticks.length.x) and
outwards ticks on the y-axis (axis.ticks.length.y) (@pank, #2935).
The arguments of Stat*$compute_layer() and Position*$compute_layer() are
now renamed to always match the ones of Stat$compute_layer() and
Position$compute_layer() (@yutannihilation, #3202).
geom_*() and stat_*() now accepts purrr-style lambda notation
(@yutannihilation, #3138).
geom_tile() and geom_rect() now draw rectangles without notches at the
corners. The style of the corner can be controlled by linejoin parameters
(@yutannihilation, #3050).
This is a minor release and breaking changes have been kept to a minimum. End users of ggplot2 are unlikely to encounter any issues. However, there are a few items that developers of ggplot2 extensions should be aware of. For additional details, see also the discussion accompanying issue #2890.
In non-user-facing internal code (specifically in the aes() function and in
the aesthetics argument of scale functions), ggplot2 now always uses the British
spelling for aesthetics containing the word "colour". When users specify a "color"
aesthetic it is automatically renamed to "colour". This renaming is also applied
to non-standard aesthetics that contain the word "color". For example, "point_color"
is renamed to "point_colour". This convention makes it easier to support both
British and American spelling for novel, non-standard aesthetics, but it may require
some adjustment for packages that have previously introduced non-standard color
aesthetics using American spelling. A new function standardise_aes_names() is
provided in case extension writers need to perform this renaming in their own code
(@clauswilke, #2649).
Functions that generate other functions (closures) now force the arguments that are
used from the generated functions, to avoid hard-to-catch errors. This may affect
some users of manual scales (such as scale_colour_manual(), scale_fill_manual(),
etc.) who depend on incorrect behavior (@krlmlr, #2807).
Coord objects now have a function backtransform_range() that returns the
panel range in data coordinates. This change may affect developers of custom coords,
who now should implement this function. It may also affect developers of custom
geoms that use the range() function. In some applications, backtransform_range()
may be more appropriate (@clauswilke, #2821).
coord_sf() has much improved customization of axis tick labels. Labels can now
be set manually, and there are two new parameters, label_graticule and
label_axes, that can be used to specify which graticules to label on which side
of the plot (@clauswilke, #2846, #2857, #2881).
Two new geoms geom_sf_label() and geom_sf_text() can draw labels and text
on sf objects. Under the hood, a new stat_sf_coordinates() calculates the
x and y coordinates from the coordinates of the sf geometries. You can customize
the calculation method via fun.geometry argument (@yutannihilation, #2761).
The error message in compute_aesthetics() now only provides the names of
aesthetics with mismatched lengths, rather than all aesthetics (@karawoo,
#2853).
For faceted plots, data is no longer internally reordered. This makes it
safer to feed data columns into aes() or into parameters of geoms or
stats. However, doing so remains discouraged (@clauswilke, #2694).
coord_sf() now also understands the clip argument, just like the other
coords (@clauswilke, #2938).
fortify() now displays a more informative error message for
grouped_df() objects when dplyr is not installed (@jimhester, #2822).
All geom_*() now display an informative error message when required
aesthetics are missing (@dpseidel, #2637 and #2706).
geom_boxplot() now understands the width parameter even when used with
a non-standard stat, such as stat_identity() (@clauswilke, #2893).
geom_hex() now understands the size and linetype aesthetics
(@mikmart, #2488).
geom_hline(), geom_vline(), and geom_abline() now work properly
with coord_trans() (@clauswilke, #2149, #2812).
geom_text(..., parse = TRUE) now correctly renders the expected number of
items instead of silently dropping items that are empty expressions, e.g.
the empty string "". If an expression spans multiple lines, we take just
the first line and drop the rest. This same issue is also fixed for
geom_label() and the axis labels for geom_sf() (@slowkow, #2867).
geom_sf() now respects lineend, linejoin, and linemitre parameters
for lines and polygons (@alistaire47, #2826).
ggsave() now exits without creating a new graphics device if previously
none was open (@clauswilke, #2363).
labs() now has named arguments title, subtitle, caption, and tag.
Also, labs() now accepts tidyeval (@yutannihilation, #2669).
position_nudge() is now more robust and nudges only in the direction
requested. This enables, for example, the horizontal nudging of boxplots
(@clauswilke, #2733).
sec_axis() and dup_axis() now return appropriate breaks for the secondary
axis when applied to log transformed scales (@dpseidel, #2729).
sec_axis() now works as expected when used in combination with tidy eval
(@dpseidel, #2788).
scale_*_date(), scale_*_time() and scale_*_datetime() can now display
a secondary axis that is a one-to-one transformation of the primary axis,
implemented using the sec.axis argument to the scale constructor
(@dpseidel, #2244).
stat_contour(), stat_density2d(), stat_bin2d(), stat_binhex()
now calculate normalized statistics including nlevel, ndensity, and
ncount. Also, stat_density() now includes the calculated statistic
nlevel, an alias for scaled, to better match the syntax of stat_bin()
(@bjreisman, #2679).
ggplot2 now supports/uses tidy evaluation (as described below). This is a major change and breaks a number of packages; we made this breaking change because it is important to make ggplot2 more programmable, and to be more consistent with the rest of the tidyverse. The best general (and detailed) introduction to tidy evaluation can be found in the meta programming chapters in Advanced R.
The primary developer facing change is that aes() now contains
quosures (expression + environment pairs) rather than symbols, and you'll
need to take a different approach to extracting the information you need.
A common symptom of this change are errors "undefined columns selected" or
"invalid 'type' (list) of argument" (#2610). As in the previous version,
constants (like aes(x = 1) or aes(colour = "smoothed")) are stored
as is.
In this version of ggplot2, if you need to describe a mapping in a string,
use quo_name() (to generate single-line strings; longer expressions may
be abbreviated) or quo_text() (to generate non-abbreviated strings that
may span multiple lines). If you do need to extract the value of a variable
instead use rlang::eval_tidy(). You may want to condition on
(packageVersion("ggplot2") <= "2.2.1") so that your code can work with
both released and development versions of ggplot2.
We recognise that this is a big change and if you're not already familiar with rlang, there's a lot to learn. If you are stuck, or need any help, please reach out on https://forum.posit.co/.
Error: Column y must be a 1d atomic vector or a list
Internally, ggplot2 now uses as.data.frame(tibble::as_tibble(x)) to
convert a list into a data frame. This improves ggplot2's support for
list-columns (needed for sf support), at a small cost: you can no longer
use matrix-columns. Note that unlike tibble we still allow column vectors
such as returned by base::scale() because of their widespread use.
Error: More than one expression parsed
Previously aes_string(x = c("a", "b", "c")) silently returned
aes(x = a). Now this is a clear error.
Error: data must be uniquely named but has duplicate columns
If layer data contains columns with identical names an error will be thrown. In earlier versions the first occurring column was chosen silently, potentially masking that the wrong data was chosen.
Error: Aesthetics must be either length 1 or the same as the data
Layers are stricter about the columns they will combine into a single data frame. Each aesthetic now must be either the same length as the data frame or a single value. This makes silent recycling errors much less likely.
Error: coord_* doesn't support free scales
Free scales only work with selected coordinate systems; previously you'd get an incorrect plot.
Error in f(...) : unused argument (range = c(0, 1))
This is because the oob argument to scale has been set to a function
that only takes a single argument; it needs to take two arguments
(x, and range).
Error: unused argument (output)
The function guide_train() now has an optional parameter aesthetic
that allows you to override the aesthetic setting in the scale.
To make your code work with the both released and development versions of
ggplot2 appropriate, add aesthetic = NULL to the guide_train() method
signature.
# old
guide_train.legend <- function(guide, scale) {...}
# new
guide_train.legend <- function(guide, scale, aesthetic = NULL) {...}
Then, inside the function, replace scale$aesthetics[1],
aesthetic %||% scale$aesthetics[1]. (The %||% operator is defined in the
rlang package).
# old
setNames(list(scale$map(breaks)), scale$aesthetics[1])
# new
setNames(list(scale$map(breaks)), aesthetic %||% scale$aesthetics[1])
The long-deprecated subset argument to layer() has been removed.
aes() now supports quasiquotation so that you can use !!, !!!,
and :=. This replaces aes_() and aes_string() which are now
soft-deprecated (but will remain around for a long time).
facet_wrap() and facet_grid() now support vars() inputs. Like
dplyr::vars(), this helper quotes its inputs and supports
quasiquotation. For instance, you can now supply faceting variables
like this: facet_wrap(vars(am, cyl)) instead of
facet_wrap(~am + cyl). Note that the formula interface is not going
away and will not be deprecated. vars() is simply meant to make it
easier to create functions around facet_wrap() and facet_grid().
The first two arguments of facet_grid() become rows and cols
and now support vars() inputs. Note however that we took special
care to ensure complete backward compatibility. With this change
facet_grid(vars(cyl), vars(am, vs)) is equivalent to
facet_grid(cyl ~ am + vs), and facet_grid(cols = vars(am, vs)) is
equivalent to facet_grid(. ~ am + vs).
One nice aspect of the new interface is that you can now easily
supply names: facet_grid(vars(Cylinder = cyl), labeller = label_both) will give nice label titles to the facets. Of course,
those names can be unquoted with the usual tidy eval syntax.
ggplot2 now has full support for sf with geom_sf() and coord_sf():
nc <- sf::st_read(system.file("shape/nc.shp", package = "sf"), quiet = TRUE)
ggplot(nc) +
geom_sf(aes(fill = AREA))
It supports all simple features, automatically aligns CRS across layers, sets up the correct aspect ratio, and draws a graticule.
ggplot2 now works on R 3.1 onwards, and uses the vdiffr package for visual testing.
In most cases, accidentally using %>% instead of + will generate an
informative error (#2400).
New syntax for calculated aesthetics. Instead of using aes(y = ..count..)
you can (and should!) use aes(y = stat(count)). stat() is a real function
with documentation which hopefully will make this part of ggplot2 less
confusing (#2059).
stat() is particularly nice for more complex calculations because you
only need to specify it once: aes(y = stat(count / max(count))),
rather than aes(y = ..count.. / max(..count..))
New tag label for adding identification tags to plots, typically used for
labelling a subplot with a letter. Add a tag with labs(tag = "A"), style it
with the plot.tag theme element, and control position with the
plot.tag.position theme setting (@thomasp85).
geom_segment() and geom_curve() have a new arrow.fill parameter which
allows you to specify a separate fill colour for closed arrowheads
(@hrbrmstr and @clauswilke, #2375).
geom_point() and friends can now take shapes as strings instead of integers,
e.g. geom_point(shape = "diamond") (@daniel-barnett, #2075).
position_dodge() gains a preserve argument that allows you to control
whether the total width at each x value is preserved (the current
default), or ensure that the width of a single element is preserved
(what many people want) (#1935).
New position_dodge2() provides enhanced dodging for boxplots. Compared to
position_dodge(), position_dodge2() compares xmin and xmax values
to determine which elements overlap, and spreads overlapping elements evenly
within the region of overlap. position_dodge2() is now the default position
adjustment for geom_boxplot(), because it handles varwidth = TRUE, and
will be considered for other geoms in the future.
The padding parameter adds a small amount of padding between elements
(@karawoo, #2143) and a reverse parameter allows you to reverse the order
of placement (@karawoo, #2171).
New stat_qq_line() makes it easy to add a simple line to a Q-Q plot, which
makes it easier to judge the fit of the theoretical distribution
(@nicksolomon).
Improved support for mapping date/time variables to alpha, size, colour,
and fill aesthetics, including date_breaks and date_labels arguments
(@karawoo, #1526), and new scale_alpha() variants (@karawoo, #1526).
Improved support for ordered factors. Ordered factors throw a warning when mapped to shape (unordered factors do not), and do not throw warnings when mapped to size or alpha (unordered factors do). Viridis is used as the default colour and fill scale for ordered factors (@karawoo, #1526).
The expand argument of scale_*_continuous() and scale_*_discrete()
now accepts separate expansion values for the lower and upper range
limits. The expansion limits can be specified using the convenience
function expand_scale().
Separate expansion limits may be useful for bar charts, e.g. if one wants the bottom of the bars to be flush with the x axis but still leave some (automatically calculated amount of) space above them:
ggplot(mtcars) +
geom_bar(aes(x = factor(cyl))) +
scale_y_continuous(expand = expand_scale(mult = c(0, .1)))
It can also be useful for line charts, e.g. for counts over time, where one wants to have a ’hard’ lower limit of y = 0 but leave the upper limit unspecified (and perhaps differing between panels), with some extra space above the highest point on the line (with symmetrical limits, the extra space above the highest point could in some cases cause the lower limit to be negative).
The old syntax for the expand argument will, of course, continue
to work (@huftis, #1669).
scale_colour_continuous() and scale_colour_gradient() are now controlled
by global options ggplot2.continuous.colour and ggplot2.continuous.fill.
These can be set to "gradient" (the default) or "viridis" (@karawoo).
New scale_colour_viridis_c()/scale_fill_viridis_c() (continuous) and
scale_colour_viridis_d()/scale_fill_viridis_d() (discrete) make it
easy to use Viridis colour scales (@karawoo, #1526).
Guides for geom_text() now accept custom labels with
guide_legend(override.aes = list(label = "foo")) (@brianwdavis, #2458).
Strips gain margins on all sides by default. This means that to fully justify text to the edge of a strip, you will need to also set the margins to 0 (@karawoo).
Rotated strip labels now correctly understand hjust and vjust parameters
at all angles (@karawoo).
Strip labels now understand justification relative to the direction of the
text, meaning that in y facets, the strip text can be placed at either end of
the strip using hjust (@karawoo).
Legend titles and labels get a little extra space around them, which prevents legend titles from overlapping the legend at large font sizes (@karawoo, #1881).
New autolayer() S3 generic (@mitchelloharawild, #1974). This is similar
to autoplot() but produces layers rather than complete plots.
Custom objects can now be added using + if a ggplot_add method has been
defined for the class of the object (@thomasp85).
Theme elements can now be subclassed. Add a merge_element method to control
how properties are inherited from the parent element. Add an element_grob
method to define how elements are rendered into grobs (@thomasp85, #1981).
Coords have gained new extension mechanisms.
If you have an existing coord extension, you will need to revise the
specification of the train() method. It is now called
setup_panel_params() (better reflecting what it actually does) and now
has arguments scale_x, and scale_y (the x and y scales respectively)
and param, a list of plot specific parameters generated by
setup_params().
What was formerly called scale_details (in coords), panel_ranges
(in layout) and panel_scales (in geoms) are now consistently called
panel_params (#1311). These are parameters of the coord that vary from
panel to panel.
ggplot_build() and ggplot_gtable() are now generics, so ggplot-subclasses
can define additional behavior during the build stage.
guide_train(), guide_merge(), guide_geom(), and guide_gengrob()
are now exported as they are needed if you want to design your own guide.
They are not currently documented; use at your own risk (#2528).
scale_type() generic is now exported and documented. Use this if you
want to extend ggplot2 to work with a new type of vector.
facet_grid() gives a more informative error message if you try to use
a variable in both rows and cols (#1928).
facet_grid() and facet_wrap() both give better error messages if you
attempt to use an unsupported coord with free scales (#2049).
label_parsed() works once again (#2279).
You can now style the background of horizontal and vertical strips
independently with strip.background.x and strip.background.y
theme settings (#2249).
discrete_scale() documentation now inherits shared definitions from
continuous_scale() (@alistaire47, #2052).
guide_colorbar() shows all colours of the scale (@has2k1, #2343).
scale_identity() once again produces legends by default (#2112).
Tick marks for secondary axes with strong transformations are more accurately placed (@thomasp85, #1992).
Missing line types now reliably generate missing lines (with standard warning) (#2206).
Legends now ignore set aesthetics that are not length one (#1932).
All colour and fill scales now have an aesthetics argument that can
be used to set the aesthetic(s) the scale works with. This makes it
possible to apply a colour scale to both colour and fill aesthetics
at the same time, via aesthetics = c("colour", "fill") (@clauswilke).
Three new generic scales work with any aesthetic or set of aesthetics:
scale_continuous_identity(), scale_discrete_identity(), and
scale_discrete_manual() (@clauswilke).
scale_*_gradient2() now consistently omits points outside limits by
rescaling after the limits are enforced (@foo-bar-baz-qux, #2230).
geom_label() now correctly produces unbordered labels when label.size
is 0, even when saving to PDF (@bfgray3, #2407).
layer() gives considerably better error messages for incorrectly specified
geom, stat, or position (#2401).
In all layers that use it, linemitre now defaults to 10 (instead of 1)
to better match base R.
geom_boxplot() now supplies a default value if no x aesthetic is present
(@foo-bar-baz-qux, #2110).
geom_density() drops groups with fewer than two data points and throws a
warning. For groups with two data points, density values are now calculated
with stats::density (@karawoo, #2127).
geom_segment() now also takes a linejoin parameter. This allows more
control over the appearance of the segments, which is especially useful for
plotting thick arrows (@Ax3man, #774).
geom_smooth() now reports the formula used when method = "auto"
(@davharris #1951). geom_smooth() now orders by the x aesthetic, making it
easier to pass pre-computed values without manual ordering (@izahn, #2028). It
also now knows it has ymin and ymax aesthetics (#1939). The legend
correctly reflects the status of the se argument when used with stats
other than the default (@clauswilke, #1546).
geom_tile() now once again interprets width and height correctly
(@malcolmbarrett, #2510).
position_jitter() and position_jitterdodge() gain a seed argument that
allows the specification of a random seed for reproducible jittering
(@krlmlr, #1996 and @slowkow, #2445).
stat_density() has better behaviour if all groups are dropped because they
are too small (#2282).
stat_summary_bin() now understands the breaks parameter (@karawoo, #2214).
stat_bin() now accepts functions for binwidth. This allows better binning
when faceting along variables with different ranges (@botanize).
stat_bin() and geom_histogram() now sum correctly when using the weight
aesthetic (@jiho, #1921).
stat_bin() again uses correct scaling for the computed variable ndensity
(@timgoodman, #2324).
stat_bin() and stat_bin_2d() now properly handle the breaks parameter
when the scales are transformed (@has2k1, #2366).
update_geom_defaults() and update_stat_defaults() allow American
spelling of aesthetic parameters (@foo-bar-baz-qux, #2299).
The show.legend parameter now accepts a named logical vector to hide/show
only some aesthetics in the legend (@tutuchan, #1798).
Layers now silently ignore unknown aesthetics with value NULL (#1909).
Clipping to the plot panel is now configurable, through a clip argument
to coordinate systems, e.g. coord_cartesian(clip = "off")
(@clauswilke, #2536).
Like scales, coordinate systems now give you a message when you're replacing an existing coordinate system (#2264).
coord_polar() now draws secondary axis ticks and labels
(@dylan-stark, #2072), and can draw the radius axis on the right
(@thomasp85, #2005).
coord_trans() now generates a warning when a transformation generates
non-finite values (@foo-bar-baz-qux, #2147).
Complete themes now always override all elements of the default theme (@has2k1, #2058, #2079).
Themes now set default grid colour in panel.grid rather than individually
in panel.grid.major and panel.grid.minor individually. This makes it
slightly easier to customise the theme (#2352).
Fixed bug when setting strips to element_blank() (@thomasp85).
Axes positioned on the top and to the right can now customize their ticks and lines separately (@thomasp85, #1899).
Built-in themes gain parameters base_line_size and base_rect_size which
control the default sizes of line and rectangle elements (@karawoo, #2176).
Default themes use rel() to set line widths (@baptiste).
Themes were tweaked for visual consistency and more graceful behavior when changing the base font size. All absolute heights or widths were replaced with heights or widths that are proportional to the base font size. One relative font size was eliminated (@clauswilke).
The height of descenders is now calculated solely on font metrics and doesn't change with the specific letters in the string. This fixes minor alignment issues with plot titles, subtitles, and legend titles (#2288, @clauswilke).
guide_colorbar() is more configurable: tick marks and color bar frame
can now by styled with arguments ticks.colour, ticks.linewidth,
frame.colour, frame.linewidth, and frame.linetype
(@clauswilke).
guide_colorbar() now uses legend.spacing.x and legend.spacing.y
correctly, and it can handle multi-line titles. Minor tweaks were made to
guide_legend() to make sure the two legend functions behave as similarly as
possible (@clauswilke, #2397 and #2398).
The theme elements legend.title and legend.text now respect the settings
of margin, hjust, and vjust (@clauswilke, #2465, #1502).
Non-angle parameters of label.theme or title.theme can now be set in
guide_legend() and guide_colorbar() (@clauswilke, #2544).
ggplot gains a method for grouped_dfs that adds a .group variable,
which computes a unique value for each group. Use it with
aes(group = .group) (#2351).
ggproto() produces objects with class c("ggproto", "gg"), allowing for
a more informative error message when adding layers, scales, or other ggproto
objects (@jrnold, #2056).
ggsave()'s DPI argument now supports 3 string options: "retina" (320
DPI), "print" (300 DPI), and "screen" (72 DPI) (@foo-bar-baz-qux, #2156).
ggsave() now uses full argument names to avoid partial match warnings
(#2355), and correctly restores the previous graphics device when several
graphics devices are open (#2363).
print.ggplot() now returns the original ggplot object, instead of the
output from ggplot_build(). Also, the object returned from
ggplot_build() now has the class "ggplot_built" (#2034).
map_data() now works even when purrr is loaded (tidyverse#66).
New functions summarise_layout(), summarise_coord(), and
summarise_layers() summarise the layout, coordinate systems, and layers
of a built ggplot object (#2034, @wch). This provides a tested API that
(e.g.) shiny can depend on.
Updated startup messages reflect new resources (#2410, @mine-cetinkaya-rundel).
structure(NULL) for R-devel compatibility (#1968).Thanks to @hrbrmstr plots now have subtitles and captions, which can be set with
the subtitle and caption arguments to ggtitle() and labs(). You can
control their appearance with the theme settings plot.caption and
plot.subtitle. The main plot title is now left-aligned to better work better
with a subtitle. The caption is right-aligned (@hrbrmstr).
position_stack() and position_fill() now sort the stacking order to match
grouping order. This allows you to control the order through grouping, and
ensures that the default legend matches the plot (#1552, #1593). If you want the
opposite order (useful if you have horizontal bars and horizontal legend), you
can request reverse stacking by using position = position_stack(reverse = TRUE)
(#1837).
position_stack() and position_fill() now accepts negative values which will
create stacks extending below the x-axis (#1691).
position_stack() and position_fill() gain a vjust argument which makes it
easy to (e.g.) display labels in the middle of stacked bars (#1821).
geom_col() was added to complement geom_bar() (@hrbrmstr). It uses
stat="identity" by default, making the y aesthetic mandatory. It does not
support any other stat_() and does not provide fallback support for the
binwidth parameter. Examples and references in other functions were updated to
demonstrate geom_col() usage.
When creating a layer, ggplot2 will warn if you use an unknown aesthetic or an unknown parameter. Compared to the previous version, this is stricter for aesthetics (previously there was no message), and less strict for parameters (previously this threw an error) (#1585).
The facet system, as well as the internal panel class, has been rewritten in
ggproto. Facets are now extendable in the same manner as geoms and stats, as
described in vignette("extending-ggplot2").
We have also added the following new features.
facet_grid() and facet_wrap() now allow expressions in their faceting
formulas (@DanRuderman, #1596).
When facet_wrap() results in an uneven number of panels, axes will now be
drawn underneath the hanging panels (fixes #1607)
Strips can now be freely positioned in facet_wrap() using the
strip.position argument (deprecates switch).
The relative order of panel, strip, and axis can now be controlled with
the theme setting strip.placement that takes either inside (strip between
panel and axis) or outside (strip after axis).
The theme option panel.margin has been deprecated in favour of
panel.spacing to more clearly communicate intent.
Unfortunately there was a major oversight in the construction of ggproto which lead to extensions capturing the super object at package build time, instead of at package run time (#1826). This problem has been fixed, but requires re-installation of all extension packages.
position argument
in scale_x_*and scale_y_* which can take top and bottom, and left
and right respectively. The themes of top and right axes can be modified
using the .top and .right modifiers to axis.text.* and axis.title.*.scale_x_continuous() and scale_y_continuous() can now display a secondary
axis that is a one-to-one transformation of the primary axis (e.g. degrees
Celcius to degrees Fahrenheit). The secondary axis will be positioned opposite
to the primary axis and can be controlled with the sec.axis argument to
the scale constructor.
Scales worry less about having breaks. If no breaks can be computed, the plot will work instead of throwing an uninformative error (#791). This is particularly helpful when you have facets with free scales, and not all panels contain data.
Scales now warn when transformation introduces infinite values (#1696).
scale_*_datetime() now supports time zones. It will use the timezone
attached to the variable by default, but can be overridden with the
timezone argument.
New scale_x_time() and scale_y_time() generate reasonable default
breaks and labels for hms vectors (#1752).
The treatment of missing values by discrete scales has been thoroughly overhauled (#1584). The underlying principle is that we can naturally represent missing values on discrete variables (by treating just like another level), so by default we should.
This principle applies to:
And to all scales (both position and non-position.)
Compared to the previous version of ggplot2, there are three main changes:
scale_x_discrete() and scale_y_discrete() always show discrete NA,
regardless of their source
If present, NAs are shown in discrete legends.
All discrete scales gain a na.translate argument that allows you to
control whether NAs are translated to something that can be visualised,
or should be left as missing. Note that if you don't translate (i.e.
na.translate = FALSE) the missing values will passed on to the layer,
which will warning that it's dropping missing values. To suppress the
warnings, you'll also need to add na.rm = TRUE to the layer call.
There were also a number of other smaller changes
The theme() constructor now has named arguments rather than ellipses. This
should make autocomplete substantially more useful. The documentation
(including examples) has been considerably improved.
Built-in themes are more visually homogeneous, and match theme_grey better.
(@jiho, #1679)
When computing the height of titles, ggplot2 now includes the height of the
descenders (i.e. the bits of g and y that hang beneath the baseline). This
improves the margins around titles, particularly the y axis label (#1712).
I have also very slightly increased the inner margins of axis titles, and
removed the outer margins.
Theme element inheritance is now easier to work with as modification now
overrides default element_blank elements (#1555, #1557, #1565, #1567)
Horizontal legends (i.e. legends on the top or bottom) are horizontally
aligned by default (#1842). Use legend.box = "vertical" to switch back
to the previous behaviour.
element_line() now takes an arrow argument to specify arrows at the end of
lines (#1740)
There were a number of tweaks to the theme elements that control legends:
legend.justification now controls appearance will plotting the legend
outside of the plot area. For example, you can use
theme(legend.justification = "top") to make the legend align with the
top of the plot.
panel.margin and legend.margin have been renamed to panel.spacing and
legend.spacing respectively, to better communicate intent (they only
affect spacing between legends and panels, not the margins around them)
legend.margin now controls margin around individual legends.
New legend.box.background, legend.box.spacing, and legend.box.margin
control the background, spacing, and margin of the legend box (the region
that contains all legends).
ggplot2 now imports tibble. This ensures that all built-in datasets print compactly even if you haven't explicitly loaded tibble or dplyr (#1677).
Class of aesthetic mapping is preserved when adding aes() objects (#1624).
+.gg now works for lists that include data frames.
annotation_x() now works in the absense of global data (#1655)
geom_*(show.legend = FALSE) now works for guide_colorbar.
geom_boxplot() gains new outlier.alpha (@jonathan-g) and
outlier.fill (@schloerke, #1787) parameters to control the alpha/fill of
outlier points independently of the alpha of the boxes.
position_jitter() (and hence geom_jitter()) now correctly computes
the jitter width/jitter when supplied by the user (#1775, @has2k1).
geom_contour() more clearly describes what inputs it needs (#1577).
geom_curve() respects the lineend parameter (#1852).
geom_histogram() and stat_bin() understand the breaks parameter once
more. (#1665). The floating point adjustment for histogram bins is now
actually used - it was previously inadvertently ignored (#1651).
geom_violin() no longer transforms quantile lines with the alpha aesthetic
(@mnbram, #1714). It no longer errors when quantiles are requested but data
have zero range (#1687). When trim = FALSE it once again has a nice
range that allows the density to reach zero (by extending the range 3
bandwidths to either side of the data) (#1700).
geom_dotplot() works better when faceting and binning on the y-axis.
(#1618, @has2k1).
geom_hexbin() once again supports ..density.. (@mikebirdgeneau, #1688).
geom_step() gives useful warning if only one data point in layer (#1645).
layer() gains new check.aes and check.param arguments. These allow
geom/stat authors to optional suppress checks for known aesthetics/parameters.
Currently this is used only in geom_blank() which powers expand_limits()
(#1795).
All stat_*() display a better error message when required aesthetics are
missing.
stat_bin() and stat_summary_hex() now accept length 1 binwidth (#1610)
stat_density() gains new argument n, which is passed to underlying function
stats::density ("number of equally spaced points at which the
density is to be estimated"). (@hbuschme)
stat_binhex() now again returns count rather than value (#1747)
stat_ecdf() respects pad argument (#1646).
stat_smooth() once again informs you about the method it has chosen.
It also correctly calculates the size of the largest group within facets.
x and y scales are now symmetric regarding the list of
aesthetics they accept: xmin_final, xmax_final, xlower,
xmiddle and xupper are now valid x aesthetics.
Scale extensions can now override the make_title and make_sec_title
methods to let the scale modify the axis/legend titles.
The random stream is now reset after calling .onAttach() (#2409).
When mapping an aesthetic to a constant (e.g.
geom_smooth(aes(colour = "loess")))), the default guide title is the name
of the aesthetic (i.e. "colour"), not the value (i.e. "loess") (#1431).
layer() now accepts a function as the data argument. The function will be
applied to the data passed to the ggplot() function and must return a
data.frame (#1527, @thomasp85). This is a more general version of the
deprecated subset argument.
theme_update() now uses the + operator instead of %+replace%, so that
unspecified values will no longer be NULLed out. theme_replace()
preserves the old behaviour if desired (@oneillkza, #1519).
stat_bin() has been overhauled to use the same algorithm as ggvis, which
has been considerably improved thanks to the advice of Randy Prium (@rpruim).
This includes:
Better arguments and a better algorithm for determining the origin.
You can now specify either boundary or the center of a bin.
origin has been deprecated in favour of these arguments.
drop is deprecated in favour of pad, which adds extra 0-count bins
at either end (needed for frequency polygons). geom_histogram() defaults
to pad = FALSE which considerably improves the default limits for
the histogram, especially when the bins are big (#1477).
The default algorithm does a (somewhat) better job at picking nice widths and origins across a wider range of input data.
bins = n now gives a histogram with n bins, not n + 1 (#1487).
All \donttest{} examples run.
All geom_() and stat_() functions now have consistent argument order:
data + mapping, then geom/stat/position, then ..., then specific arguments,
then arguments common to all layers (#1305). This may break code if you were
previously relying on partial name matching, but in the long-term should make
ggplot2 easier to use. In particular, you can now set the n parameter
in geom_density2d() without it partially matching na.rm (#1485).
For geoms with both colour and fill, alpha once again only affects
fill (Reverts #1371, #1523). This was causing problems for people.
facet_wrap()/facet_grid() works with multiple empty panels of data
(#1445).
facet_wrap() correctly swaps nrow and ncol when faceting vertically
(#1417).
ggsave("x.svg") now uses svglite to produce the svg (#1432).
geom_boxplot() now understands outlier.color (#1455).
geom_path() knows that "solid" (not just 1) represents a solid line (#1534).
geom_ribbon() preserves missing values so they correctly generate a
gap in the ribbon (#1549).
geom_tile() once again accepts width and height parameters (#1513).
It uses draw_key_polygon() for better a legend, including a coloured
outline (#1484).
layer() now automatically adds a na.rm parameter if none is explicitly
supplied.
position_jitterdodge() now works on all possible dodge aesthetics,
e.g. color, linetype etc. instead of only based on fill (@bleutner)
position = "nudge" now works (although it doesn't do anything useful)
(#1428).
The default scale for columns of class "AsIs" is now "identity" (#1518).
scale_*_discrete() has better defaults when used with purely continuous
data (#1542).
scale_size() warns when used with categorical data.
scale_size(), scale_colour(), and scale_fill() gain date and date-time
variants (#1526).
stat_bin_hex() and stat_bin_summary() now use the same underlying
algorithm so results are consistent (#1383). stat_bin_hex() now accepts
a weight aesthetic. To be consistent with related stats, the output variable
from stat_bin_hex() is now value instead of count.
stat_density() gains a bw parameter which makes it easy to get consistent
smoothing between facets (@jiho)
stat-density-2d() no longer ignores the h parameter, and now accepts
bins and binwidth parameters to control the number of contours
(#1448, @has2k1).
stat_ecdf() does a better job of adding padding to -Inf/Inf, and gains
an argument pad to suppress the padding if not needed (#1467).
stat_function() gains an xlim parameter (#1528). It once again works
with discrete x values (#1509).
stat_summary() preserves sorted x order which avoids artefacts when
display results with geom_smooth() (#1520).
All elements should now inherit correctly for all themes except theme_void().
(@Katiedaisey, #1555)
theme_void() was completely void of text but facets and legends still
need labels. They are now visible (@jiho).
You can once again set legend key and height width to unit arithmetic
objects (like 2 * unit(1, "cm")) (#1437).
Eliminate spurious warning if you have a layer with no data and no aesthetics (#1451).
Removed a superfluous comma in theme-defaults.r code (@jschoeley)
Fixed a compatibility issue with ggproto and R versions prior to 3.1.2.
(#1444)
Fixed issue where coord_map() fails when given an explicit parameters
argument (@tdmcarthur, #1729)
Fixed issue where geom_errorbarh() had a required x aesthetic (#1933)
ggplot no longer throws an error if your plot has no layers. Instead it
automatically adds geom_blank() (#1246).
New cut_width() is a convenient replacement for the verbose
plyr::round_any(), with the additional benefit of offering finer
control.
New geom_count() is a convenient alias to stat_sum(). Use it when you
have overlapping points on a scatterplot. stat_sum() now defaults to
using counts instead of proportions.
New geom_curve() adds curved lines, with a similar specification to
geom_segment() (@veraanadi, #1088).
Date and datetime scales now have date_breaks, date_minor_breaks and
date_labels arguments so that you never need to use the long
scales::date_breaks() or scales::date_format().
geom_bar() now has it's own stat, distinct from stat_bin() which was
also used by geom_histogram(). geom_bar() now uses stat_count()
which counts values at each distinct value of x (i.e. it does not bin
the data first). This can be useful when you want to show exactly which
values are used in a continuous variable.
geom_point() gains a stroke aesthetic which controls the border width of
shapes 21-25 (#1133, @SeySayux). size and stroke are additive so a point
with size = 5 and stroke = 5 will have a diameter of 10mm. (#1142)
New position_nudge() allows you to slightly offset labels (or other
geoms) from their corresponding points (#1109).
scale_size() now maps values to area, not radius. Use scale_radius()
if you want the old behaviour (not recommended, except perhaps for lines).
New stat_summary_bin() works like stat_summary() but on binned data.
It's a generalisation of stat_bin() that can compute any aggregate,
not just counts (#1274). Both default to mean_se() if no aggregation
functions are supplied (#1386).
Layers are now much stricter about their arguments - you will get an error if you've supplied an argument that isn't an aesthetic or a parameter. This is likely to cause some short-term pain but in the long-term it will make it much easier to spot spelling mistakes and other errors (#1293).
This change does break a handful of geoms/stats that used ... to pass
additional arguments on to the underlying computation. Now
geom_smooth()/stat_smooth() and geom_quantile()/stat_quantile()
use method.args instead (#1245, #1289); and stat_summary() (#1242),
stat_summary_hex(), and stat_summary2d() use fun.args.
There is now an official mechanism for defining Stats, Geoms, and Positions in
other packages. See vignette("extending-ggplot2") for details.
All Geoms, Stats and Positions are now exported, so you can inherit from them when making your own objects (#989).
ggplot2 no longer uses proto or reference classes. Instead, we now use ggproto, a new OO system designed specifically for ggplot2. Unlike proto and RC, ggproto supports clean cross-package inheritance. Creating a new OO system isn't usually the right way to solve a problem, but I'm pretty sure it was necessary here. Read more about it in the vignette.
aes_() replaces aes_q(). It also supports formulas, so the most concise
SE version of aes(carat, price) is now aes_(~carat, ~price). You may
want to use this form in packages, as it will avoid spurious R CMD check
warnings about undefined global variables.
geom_text() has been overhauled to make labelling your data a little
easier. It:
nudge_x and nudge_y arguments let you offset labels from their
corresponding points (#1120).
check_overlap = TRUE provides a simple way to avoid overplotting
of labels: labels that would otherwise overlap are omitted (#1039).
hjust and vjust can now be character vectors: "left", "center",
"right", "bottom", "middle", "top". New options include "inward" and
"outward" which align text towards and away from the center of the plot
respectively.
geom_label() works like geom_text() but draws a rounded rectangle
underneath each label (#1039). This is useful when you want to label plots
that are dense with data.
The little used aes_auto() has been deprecated.
aes_q() has been replaced with aes_() to be consistent with SE versions
of NSE functions in other packages.
The order aesthetic is officially deprecated. It never really worked, and
was poorly documented.
The stat and position arguments to qplot() have been deprecated.
qplot() is designed for quick plots - if you need to specify position
or stat, use ggplot() instead.
The theme setting axis.ticks.margin has been deprecated: now use the margin
property of axis.text.
stat_abline(), stat_hline() and stat_vline() have been removed:
these were never suitable for use other than with geom_abline() etc
and were not documented.
show_guide has been renamed to show.legend: this more accurately
reflects what it does (controls appearance of layer in legend), and uses the
same convention as other ggplot2 arguments (i.e. a . between names).
(Yes, I know that's inconsistent with function names with use _, but it's
too late to change now.)
A number of geoms have been renamed to be internally consistent:
stat_binhex() and stat_bin2d() have been renamed to stat_bin_hex()
and stat_bin_2d() (#1274). stat_summary2d() has been renamed to
stat_summary_2d(), geom_density2d()/stat_density2d() has been renamed
to geom_density_2d()/stat_density_2d().
stat_spoke() is now geom_spoke() since I realised it's a
reparameterisation of geom_segment().
stat_bindot() has been removed because it's so tightly coupled to
geom_dotplot(). If you happened to use stat_bindot(), just change to
geom_dotplot() (#1194).
All defunct functions have been removed.
The default theme_grey() background colour has been changed from "grey90"
to "grey92": this makes the background a little less visually prominent.
Labels and titles have been tweaked for readability:
Axes labels are darker.
Legend and axis titles are given the same visual treatment.
The default font size dropped from 12 to 11. You might be surprised that I've made the default text size smaller as it was already hard for many people to read. It turns out there was a bug in RStudio (fixed in 0.99.724), that shrunk the text of all grid based graphics. Once that was resolved the defaults seemed too big to my eyes.
More spacing between titles and borders.
Default margins scale with the theme font size, so the appearance at larger font sizes should be considerably improved (#1228).
alpha now affects both fill and colour aesthetics (#1371).
element_text() gains a margins argument which allows you to add additional
padding around text elements. To help see what's going on use debug = TRUE
to display the text region and anchors.
The default font size in geom_text() has been decreased from 5mm (14 pts)
to 3.8 mm (11 pts) to match the new default theme sizes.
A diagonal line is no longer drawn on bar and rectangle legends. Instead, the border has been tweaked to be more visible, and more closely match the size of line drawn on the plot.
geom_pointrange() and geom_linerange() get vertical (not horizontal)
lines in the legend (#1389).
The default line size for geom_smooth() has been increased from 0.5 to 1
to make it easier to see when overlaid on data.
geom_bar() and geom_rect() use a slightly paler shade of grey so they
aren't so visually heavy.
geom_boxplot() now colours outliers the same way as the boxes.
geom_point() now uses shape 19 instead of 16. This looks much better on
the default Linux graphics device. (It's very slightly smaller than the old
point, but it shouldn't affect any graphics significantly)
Sizes in ggplot2 are measured in mm. Previously they were converted to pts (for use in grid) by multiplying by 72 / 25.4. However, grid uses printer's points, not Adobe (big pts), so sizes are now correctly multiplied by 72.27 / 25.4. This is unlikely to noticeably affect display, but it's technically correct (https://youtu.be/hou0lU8WMgo).
The default legend will now allocate multiple rows (if vertical) or
columns (if horizontal) in order to make a legend that is more likely to
fit on the screen. You can override with the nrow/ncol arguments
to guide_legend()
p <- ggplot(mpg, aes(displ,hwy, colour = model)) + geom_point()
p
p + theme(legend.position = "bottom")
# Previous behaviour
p + guides(colour = guide_legend(ncol = 1))
New theme_void() is completely empty. It's useful for plots with non-
standard coordinates or for drawings (@jiho, #976).
New theme_dark() has a dark background designed to make colours pop out
(@jiho, #1018)
theme_minimal() became slightly more minimal by removing the axis ticks:
labels now line up directly beneath grid lines (@tomschloss, #1084)
New theme setting panel.ontop (logical) make it possible to place
background elements (i.e., gridlines) on top of data. Best used with
transparent panel.background (@noamross. #551).
The facet labelling system was updated with many new features and a more flexible interface (@lionel-). It now works consistently across grid and wrap facets. The most important user visible changes are:
facet_wrap() gains a labeller option (#25).
facet_grid() and facet_wrap() gain a switch argument to
display the facet titles near the axes. When switched, the labels
become axes subtitles. switch can be set to "x", "y" or "both"
(the latter only for grids) to control which margin is switched.
The labellers (such as label_value() or label_both()) also get
some new features:
They now offer the multi_line argument to control whether to
display composite facets (those specified as ~var1 + var2) on one
or multiple lines.
In label_bquote() you now refer directly to the names of
variables. With this change, you can create math expressions that
depend on more than one variable. This math expression can be
specified either for the rows or the columns and you can also
provide different expressions to each margin.
As a consequence of these changes, referring to x in backquoted
expressions is deprecated.
Similarly to label_bquote(), labeller() now take .rows and
.cols arguments. In addition, it also takes .default.
labeller() is useful to customise how particular variables are
labelled. The three additional arguments specify how to label the
variables are not specifically mentioned, respectively for rows,
columns or both. This makes it especially easy to set up a
project-wide labeller dispatcher that can be reused across all your
plots. See the documentation for an example.
The new labeller label_context() adapts to the number of factors
facetted over. With a single factor, it displays only the values,
just as before. But with multiple factors in a composite margin
(e.g. with ~cyl + am), the labels are passed over to
label_both(). This way the variables names are displayed with the
values to help identifying them.
On the programming side, the labeller API has been rewritten in order
to offer more control when faceting over multiple factors (e.g. with
formulae such as ~cyl + am). This also means that if you have
written custom labellers, you will need to update them for this
version of ggplot.
Previously, a labeller function would take variable and value
arguments and return a character vector. Now, they take a data frame
of character vectors and return a list. The input data frame has one
column per factor facetted over and each column in the returned list
becomes one line in the strip label. See documentation for more
details.
The labels received by a labeller now contain metadata: their margin (in the "type" attribute) and whether they come from a wrap or a grid facet (in the "facet" attribute).
Note that the new as_labeller() function operator provides an easy
way to transform an existing function to a labeller function. The
existing function just needs to take and return a character vector.
Improved documentation for aes(), layer() and much much more.
I've tried to reduce the use of ... so that you can see all the
documentation in one place rather than having to integrate multiple pages.
In some cases this has involved adding additional arguments to geoms
to make it more clear what you can do:
geom_smooth() gains explicit method, se and formula arguments.
geom_histogram() gains binwidth, bins, origin and right
arguments.
geom_jitter() gains width and height arguments to make it easier
to control the amount of jittering without using the lengthy
position_jitter() function (#1116)
Use of qplot() in examples has been minimised (#1123, @hrbrmstr). This is
inline with the 2nd edition of the ggplot2 box, which minimises the use of
qplot() in favour of ggplot().
Tightly linked geoms and stats (e.g. geom_boxplot() and stat_boxplot())
are now documented in the same file so you can see all the arguments in one
place. Variations of the same idea (e.g. geom_path(), geom_line(), and
geom_step()) are also documented together.
It's now obvious that you can set the binwidth parameter for
stat_bin_hex(), stat_summary_hex(), stat_bin_2d(), and
stat_summary_2d().
The internals of positions have been cleaned up considerably. You're unlikely to notice any external changes, although the documentation should be a little less confusing since positions now don't list parameters they never use.
All datasets have class tbl_df so if you also use dplyr, you get a better
print method.
economics has been brought up to date to 2015-04-01.
New economics_long is the economics data in long form.
New txhousing dataset containing information about the Texas housing
market. Useful for examples that need multiple time series, and for
demonstrating model+vis methods.
New luv_colours dataset which contains the locations of all
built-in colors() in Luv space.
movies has been moved into its own package, ggplot2movies, because it was
large and not terribly useful. If you've used the movies dataset, you'll now
need to explicitly load the package with library(ggplot2movies).
All partially matched arguments and $ have been been replaced with
full matches (@jimhester, #1134).
ggplot2 now exports alpha() from the scales package (#1107), and arrow()
and unit() from grid (#1225). This means you don't need attach scales/grid
or do scales::/grid:: for these commonly used functions.
aes_string() now only parses character inputs. This fixes bugs when
using it with numbers and non default OutDec settings (#1045).
annotation_custom() automatically adds a unique id to each grob name,
making it easier to plot multiple grobs with the same name (e.g. grobs of
ggplot2 graphics) in the same plot (#1256).
borders() now accepts xlim and ylim arguments for specifying the geographical
region of interest (@markpayneatwork, #1392).
coord_cartesian() applies the same expansion factor to limits as for scales.
You can suppress with expand = FALSE (#1207).
coord_trans() now works when breaks are suppressed (#1422).
cut_number() gives error message if the number of requested bins can
be created because there are two few unique values (#1046).
Character labels in facet_grid() are no longer (incorrectly) coerced into
factors. This caused problems with custom label functions (#1070).
facet_wrap() and facet_grid() now allow you to use non-standard
variable names by surrounding them with backticks (#1067).
facet_wrap() more carefully checks its nrow and ncol arguments
to ensure that they're specified correctly (@richierocks, #962)
facet_wrap() gains a dir argument to control the direction the
panels are wrapped in. The default is "h" for horizontal. Use "v" for
vertical layout (#1260).
geom_abline(), geom_hline() and geom_vline() have been rewritten to
have simpler behaviour and be more consistent:
stat_abline(), stat_hline() and stat_vline() have been removed:
these were never suitable for use other than with geom_abline() etc
and were not documented.
geom_abline(), geom_vline() and geom_hline() are bound to
stat_identity() and position_identity()
Intercept parameters can no longer be set to a function.
They are all documented in one file, since they are so closely related.
geom_bin2d() will now let you specify one dimension's breaks exactly,
without touching the other dimension's default breaks at all (#1126).
geom_crossbar() sets grouping correctly so you can display multiple
crossbars on one plot. It also makes the default fatten argument a little
bigger to make the middle line more obvious (#1125).
geom_histogram() and geom_smooth() now only inform you about the
default values once per layer, rather than once per panel (#1220).
geom_pointrange() gains fatten argument so you can control the
size of the point relative to the size of the line.
geom_segment() annotations were not transforming with scales
(@BrianDiggs, #859).
geom_smooth() is no longer so chatty. If you want to know what the default
smoothing method is, look it up in the documentation! (#1247)
geom_violin() now has the ability to draw quantile lines (@DanRuderman).
ggplot() now captures the parent frame to use for evaluation,
rather than always defaulting to the global environment. This should
make ggplot more suitable to use in more situations (e.g. with knitr)
ggsave() has been simplified a little to make it easier to maintain.
It no longer checks that you're printing a ggplot2 object (so now also
works with any grid grob) (#970), and always requires a filename.
Parameter device now supports character argument to specify which supported
device to use ('pdf', 'png', 'jpeg', etc.), for when it cannot be correctly
inferred from the file extension (for example when a temporary filename is
supplied server side in shiny apps) (@sebkopf, #939). It no longer opens
a graphics device if one isn't already open - this is annoying when you're
running from a script (#1326).
guide_colorbar() creates correct legend if only one color (@krlmlr, #943).
guide_colorbar() no longer fails when the legend is empty - previously
this often masked misspecifications elsewhere in the plot (#967).
New layer_data() function extracts the data used for plotting for a given
layer. It's mostly useful for testing.
User supplied minor_breaks can now be supplied on the same scale as
the data, and will be automatically transformed with by scale (#1385).
You can now suppress the appearance of an axis/legend title (and the space
that would allocated for it) with NULL in the scale_ function. To
use the default label, use waiver() (#1145).
Position adjustments no longer warn about potentially varying ranges because the problem rarely occurs in practice and there are currently a lot of false positives since I don't understand exactly what FP criteria I should be testing.
scale_fill_grey() now uses red for missing values. This matches
scale_colour_grey() and makes it obvious where missing values lie.
Override with na.value.
scale_*_gradient2() defaults to using Lab colour space.
scale_*_gradientn() now allows colours or colors (#1290)
scale_y_continuous() now also transforms the lower, middle and upper
aesthetics used by geom_boxplot(): this only affects
geom_boxplot(stat = "identity") (#1020).
Legends no longer inherit aesthetics if inherit.aes is FALSE (#1267).
lims() makes it easy to set the limits of any axis (#1138).
labels = NULL now works with guide_legend() and guide_colorbar().
(#1175, #1183).
override.aes now works with American aesthetic spelling, e.g. color
Scales no longer round data points to improve performance of colour palettes. Instead the scales package now uses a much faster colour interpolation algorithm (#1022).
scale_*_brewer() and scale_*_distiller() add new direction argument of
scales::brewer_pal, making it easier to change the order of colours
(@jiho, #1139).
scale_x_date() now clips dates outside the limits in the same way as
scale_x_continuous() (#1090).
stat_bin() gains bins arguments, which denotes the number of bins. Now
you can set bins=100 instead of binwidth=0.5. Note that breaks or
binwidth will override it (@tmshn, #1158, #102).
stat_boxplot() warns if a continuous variable is used for the x aesthetic
without also supplying a group aesthetic (#992, @krlmlr).
stat_summary_2d() and stat_bin_2d() now share exactly the same code for
determining breaks from bins, binwidth, and origin.
stat_summary_2d() and stat_bin_2d() now output in tile/raster compatible
form instead of rect compatible form.
Automatically computed breaks do not lead to an error for transformations like "probit" where the inverse can map to infinity (#871, @krlmlr)
stat_function() now always evaluates the function on the original scale.
Previously it computed the function on transformed scales, giving incorrect
values (@BrianDiggs, #1011).
strip_dots works with anonymous functions within calculated aesthetics
(e.g. aes(sapply(..density.., function(x) mean(x)))) (#1154, @NikNakk)
theme() gains validate = FALSE parameter to turn off validation, and
hence store arbitrary additional data in the themes. (@tdhock, #1121)
Improved the calculation of segments needed to draw the curve representing a line when plotted in polar coordinates. In some cases, the last segment of a multi-segment line was not drawn (@BrianDiggs, #952)