Changes in version 1.0.2.9000                      

                 Changes in version 1.0.2 (2021-04-12)                  

  - Fixes for R CMD check changes.

                 Changes in version 1.0.1 (2019-09-16)                  

  - airports$tz with values \N replaced with NA (#36).

  - weather$year and weather$month are now integers to match
    flights$year and flights$month (@jozefhajnala, #34)

                 Changes in version 1.0.0 (2018-06-26)                  

  - weather$time_hour and flights$time_hour are now stored in the
    America/New_York timezone (#19).

  - weather data updated from latest Iowa State mesonet (@rmcd1024,
    #24). wind_gust is now correctly captured from the underlying data,
    rather than being a copy of wind_speed. precip is better captures
    the hourly preciptation (which tends to be recorded at 51 minutes
    past the hour) (#27)

                 Changes in version 0.2.2 (2017-01-27)                  

  - Import function from tibble to suppress R CMD check NOTE.

                 Changes in version 0.2.1 (2016-12-29)                  

  - nycflights imports tibble so you get nice printing even when no
    other tidyverse package is loaded.

  - airports now has a tzone column that contains the IANA time zone for
    the airport (#15).

                 Changes in version 0.2.0 (2016-04-30)                  

  - airlines: carrier columns are characters instead of factors (#2).

  - airports: duplicate entry for BFT removed (#7).

  - flights:
    
      - new time_hour variable combines year, month, day, and hour into
        a single variable (#11).
    
      - new sched_dep_time and sched_arr_time variables give scheduled
        departure and arrival times - these are more appropriate for
        connecting to weather data. hour and minute are now computed
        from the scheduled departure time, not the actual departure
        time.
    
      - missing tailnum now recorded as NA, not "" (#10).

  - weather:
    
      - Includes weather data for all airports.
    
      - New time_hour variable combines year, month, day, hour into a
        single POSIXct variable.
    
      - Saved as ungrouped.