gtfstools (version 1.4.0)

get_trip_segment_duration: Get trip segments' duration

Description

Returns the duration of segments between stops of each specified trip_id.

Usage

get_trip_segment_duration(
  gtfs,
  trip_id = NULL,
  unit = "min",
  sort_sequence = FALSE
)

Value

A data.table containing the segments' duration of each specified trip.

Arguments

gtfs

A GTFS object, as created by read_gtfs().

trip_id

A string vector including the trip_ids to have their segments' duration calculated. If NULL (the default) the function calculates the segments' duration of every trip_id in the GTFS.

unit

A string representing the time unit in which the duration is desired. One of "s" (seconds), "min" (minutes, the default), "h" (hours) or "d" (days).

sort_sequence

A logical specifying whether to sort timetables by stop_sequence. Defaults to FALSE, otherwise spec-compliant feeds, in which timetables points are already ordered by stop_sequence, would be penalized through longer processing times. Durations calculated from unordered timetables do not correctly depict the real life segment durations.

Details

A trip segment is defined as the path between two subsequent stops in the same trip. The duration of a segment is defined as the time difference between its arrival time and its departure time, as specified in the stop_times file.

Examples

# \dontshow{
  old_dt_threads <- data.table::setDTthreads(1)
  on.exit(data.table::setDTthreads(old_dt_threads), add = TRUE)
# }
data_path <- system.file("extdata/spo_gtfs.zip", package = "gtfstools")

gtfs <- read_gtfs(data_path)

trip_segment_dur <- get_trip_segment_duration(gtfs)
head(trip_segment_dur)

# use the trip_id argument to control which trips are analyzed
trip_segment_dur <- get_trip_segment_duration(gtfs, trip_id = "CPTM L07-0")
trip_segment_dur

# use the unit argument to control in which unit the durations are calculated
trip_segment_dur <- get_trip_segment_duration(gtfs, "CPTM L07-0", unit = "s")
trip_segment_dur