Calculate service pattern ids for a GTFS feed — set

Each trip has a defined number of dates it runs on. This set of dates is called a service pattern in tidytransit. Trips with the same servicepattern id run on the same dates. In general, service_id can work this way but it is not enforced by the GTFS standard.

set_servicepattern(
  gtfs_obj,
  id_prefix = "s_",
  hash_algo = "md5",
  hash_length = 7
)

Arguments

gtfs_obj: gtfs feed (tidygtfs object)
id_prefix: all servicepattern ids will start with this string
hash_algo: hashing algorithm used by digest
hash_length: length the hash should be cut to with substr(). Use -1 if the full hash should be used

Value

modified gtfs_obj with added servicepattern list and a table linking trips and pattern (trip_servicepatterns), added to gtfs_obj$. sublist.