Extract station-to-station distance matrix
Arguments
- bikedb
A string containing the path to the SQLite3 database. If no directory specified, it is presumed to be in
tempdir().- city
City for which tripmat is to be aggregated
- expand
Distances are calculated by routing through the OpenStreetMap street network surrounding the bike stations, with the street network expanded by this amount to ensure all stations can be connected.
- long
If FALSE, a square distance matrix of (num-stations, num_stations) is returned; if TRUE, a long-format matrix of (stn-from, stn-to, distance) is returned.
- quiet
If FALSE, progress is displayed on screen
Value
If long = FALSE, a square matrix of numbers of trips between
each station, otherwise a long-form tibble with three columns of of
(start_station_id, end_station_id, distance)
Note
Distance matrices returned from bike_distamat use all stations
listed for a given system, while trip matrices extracted with
bike_tripmat will often have fewer stations because operational
station numbers commonly vary over time. The two matrices may be reconciled
with the match_trips2dists function, enabling then to be directly
compared.