gtfstools (version 1.1.0)

filter_by_shape_id: Filter GTFS object by shape_id

Description

Filters a GTFS object by shape_ids, keeping (or dropping) the relevant entries in each file.

Usage

filter_by_shape_id(gtfs, shape_id, keep = TRUE)

Value

The GTFS object passed to the gtfs parameter, after the filtering process.

Arguments

gtfs

A GTFS object, as created by read_gtfs().

shape_id

A character vector. The shape_ids used to filter the data.

keep

A logical. Whether the entries related to the specified shape_ids should be kept or dropped (defaults to TRUE, which keeps the entries).

See Also

Other filtering functions: filter_by_agency_id(), filter_by_route_id(), filter_by_route_type(), filter_by_service_id(), filter_by_sf(), filter_by_stop_id(), filter_by_time_of_day(), filter_by_trip_id(), filter_by_weekday()

Examples

data_path <- system.file("extdata/spo_gtfs.zip", package = "gtfstools")
gtfs <- read_gtfs(data_path)
shape_ids <- c("17846", "68962")

object.size(gtfs)

# keeps entries related to passed shape_ids
smaller_gtfs <- filter_by_shape_id(gtfs, shape_ids)
object.size(smaller_gtfs)

# drops entries related to passed shape_ids
smaller_gtfs <- filter_by_shape_id(gtfs, shape_ids, keep = FALSE)
object.size(smaller_gtfs)