Function reference • gtfs2gps

All functions
`adjust_arrival_departure()`	Adjust the arrival and departure times of a GTFS data
`adjust_speed()`	Adjust the speeds of a gps-like table created with `gtfs2gps`
`append_height()`	Add a column with height to GPS data
`filter_single_trip()`	Filter GTFS trips in order to have one trip per shape_id
`filter_valid_stop_times()`	Filter GTFS data using valid stop times
`gps_as_sflinestring()`	Converts a GPS-like data.table to a LineString Simple Feature (sf) object
`gps_as_sfpoints()`	Convert GPS-like data.table to a Simple Feature points object
`gtfs2gps()`	Convert GTFS to GPS-like data given a spatial resolution
`gtfs_shapes_as_sf()`	Convert GTFS shapes to simple feature object
`gtfs_stops_as_sf()`	Convert GTFS stops to simple feature object
`read_gtfs()`	Read GTFS data into a list of data.tables
`remove_invalid()`	Remove invalid objects from GTFS data
`simplify_shapes()`	Simplify shapes of a GTFS file
`test_gtfs_freq()`	Test whether a GTFS feed is frequency based
`write_gtfs()`	Write GTFS data into a zip file

Reference