Filter GTFS object by trip_id

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

Usage

filter_by_trip_id(gtfs, trip_id, keep = TRUE)

Arguments

gtfs

A GTFS object, as created by read_gtfs().

trip_id

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

keep

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

Value

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

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_shape_id(), filter_by_spatial_extent(), filter_by_stop_id(), filter_by_time_of_day(), filter_by_weekday()

Examples

data_path <- system.file("extdata/spo_gtfs.zip", package = "gtfstools")
gtfs <- read_gtfs(data_path)
trip_ids <- c("CPTM L07-0", "2002-10-0")

object.size(gtfs)
#> 811304 bytes

# keeps entries related to passed trip_ids
smaller_gtfs <- filter_by_trip_id(gtfs, trip_ids)
object.size(smaller_gtfs)
#> 73056 bytes

# drops entries related to passed trip_ids
smaller_gtfs <- filter_by_trip_id(gtfs, trip_ids, keep = FALSE)
object.size(smaller_gtfs)
#> 768792 bytes