Function reference • tidytransit

Read and write GTFS feeds
`read_gtfs()`	Read and validate GTFS files
`write_gtfs()`	Write a tidygtfs object to a zip file
Travel time calculations
`travel_times()`	Calculate shortest travel times from a stop to all reachable stops
`raptor()`	Calculate travel times from one stop to all reachable stops
`filter_stop_times()`	Filter a `stop_times` table for a given date and timespan.
Filter GTFS objects
`filter_feed_by_date()`	Filter a gtfs feed so that it only contains trips running on a given date
`filter_feed_by_area()`	Filter a gtfs feed so that it only contains trips that pass a given area
`filter_feed_by_stops()`	Filter a gtfs feed so that it only contains trips that pass the given stops
`filter_feed_by_trips()`	Filter a gtfs feed so that it only contains a given set of trips
`filter_stops()`	Get a set of stops for a given set of service ids and route ids
Analyse
`validate_gtfs()`	Validate GTFS file
`set_servicepattern()`	Calculate servicepattern ids for a gtfs feed
`get_route_frequency()`	Get Route Frequency
`get_stop_frequency()`	Get Stop Frequency
`summary(<tidygtfs>)`	GTFS feed summary
Find and fix inconsistencies in feeds
`interpolate_stop_times()`	Interpolate missing stop_times linearly Uses shape_dist_traveled if available
`cluster_stops()`	Cluster nearby stops within a group
`stop_group_distances()`	Calculates distances among stop within the same group column
`stop_distances()`	Calculate distances between a given set of stops
Geospatial functions (sf)
`gtfs_as_sf()`	Convert stops and shapes to Simple Features
`gtfs_transform()`	Transform or convert coordinates of a gtfs feed
`shapes_as_sf()`	Convert shapes into Simple Features Linestrings
`stops_as_sf()`	Convert stops into Simple Features Points
`get_trip_geometry()`	Get all trip shapes for given trip ids
`get_route_geometry()`	Get all trip shapes for a given route and service
`sf_as_tbl()`	Convert stops and shapes from sf objects to tibbles
`sf_lines_to_df()`	Adds the coordinates of an sf LINESTRING object as columns and rows
`sf_points_to_df()`	Adds the coordinates of an sf POINT object as columns
Helpers
`as_tidygtfs()`	Convert another gtfs like object to a tidygtfs object
`gtfs_to_tidygtfs()`	Convert an object created by gtfsio::import_gtfs to a tidygtfs object
`convert_times_to_hms()`	Convert time columns to hms::hms in feed
`hhmmss_to_hms()`	convert a vector of time strings empty strings are converted to NA
`hhmmss_to_seconds()`	Function to convert "HH:MM:SS" time strings to seconds.
`hhmmss_to_sec_split()`	Fallback function to convert strings like 5:02:11 10x slower than `hhmmss_to_seconds()`, empty strings are converted to NA
`na_to_empty_strings()`	Convert NA values to empty strings ("")
`feed_contains()`	Returns TRUE if the given gtfs_obj contains the table. Used to check for tidytransit's calculated tables in sublist (`gtfs_obj$.`)
`duplicated_primary_keys()`	Check if primary keys are unique within tables
`empty_strings_to_na()`	Convert empty strings ("") to NA values in all gtfs tables
`plot(<tidygtfs>)`	Plot GTFS stops and trips
`print(<tidygtfs>)`	Print a GTFS object
Datasets
`gtfs_duke`	Example GTFS data
`route_type_names`	Dataframe of route type id's and the names of the types (e.g. "Bus")

Reference

Read and write GTFS feeds

Travel time calculations

Filter GTFS objects

Analyse

Find and fix inconsistencies in feeds

Geospatial functions (sf)

Helpers

Datasets