gtfstools (version 1.1.0)

get_parent_station: Get parent stations recursively

Description

Returns the (recursive) parent stations of each specified stop_id. Recursive in this context means it returns all parents' parents (i.e. first parents, then parents' parents, and then their parents, and so on).

Usage

get_parent_station(gtfs, stop_id = NULL)

Value

A data.table containing the stop_ids and their parent_stations. If a stop doesn't have a parent, its correspondent parent_station entry is marked as "".

Arguments

gtfs

A GTFS object, as created by read_gtfs().

stop_id

A string vector including the stop_ids to have their parents returned. If NULL (the default), the function returns the parents of every stop_id in the GTFS.

See Also

get_children_stops()

Examples

data_path <- system.file("extdata/ggl_gtfs.zip", package = "gtfstools")

gtfs <- read_gtfs(data_path)

parents <- get_parent_station(gtfs)
head(parents)

# use the stop_id argument to control which stops are analyzed
parents <- get_parent_station(gtfs, c("B1", "B2"))
parents