Acquire a directory of river water-level files

For examples, see dod.river().

Usage

dod.river.index(url, name, debug = 0)

url: character value indicating the URL of a station listing. If not provided, this defaults to https://hpfx.collab.science.gc.ca/today/hydrometric/doc/hydrometric_StationList.csv and this is the only URL on which the code is expected to work.
name: character value indicating the name of the station for which information is sought. This may be a regular expression. If not provided, "sackville.*bedford" is used. Set name to NULL to get a listing for all stations.
debug: integer indicating the level of debugging information that is printed during processing. The default, debug=0, means to work quietly.

a data frame holding columns named "id", "name", "latitude", "region" and `"tz", with one row for each selected station.

Dan Kelley