name or ID, or a vector of station names/IDs. Elements can be
a character string (must match actual station name identically), or numeric
station ID (no quotes: i.e., 12 rather than "12"). Use psmsl.stations
to find stations, or check http://www.psmsl.org. If multiple stations are included, their
data is combined using rbind, making a long (rather than wide) dataset. Default
station is the Battery, in New York City.