Put together the url of flight data files
get_flights_url(type, year, month)
String. Whether the data set should be of the type basica
(flight stage, the default) or combinada
(On flight origin and
destination - OFOD).
Numeric. Year of the data in yyyy
format.
Numeric. Month of the data in mm
format.
A url string.
if (FALSE) if (interactive()) {
# Generate url
a <- get_flights_url(type='basica', year=2000, month=11)
}