`prepare_calendar()` extracts calendar information from "stat" folder to the
`output`folder accordingly to the crops in `typo`.
Usage
prepare_calendar(path, typo)
Arguments
- path
list describing where to find useful paths. Result of
`init_path()`.
- typo
data.frame of crop typology. Should be found in `floodam.csv`.
Value
csv2 file of calendar for each crop present in `typo`.
Details
`prepare_calendar()` uses the order of elements in `path[["extent"]]`
to load `typo` and to extract calendars for each crop.
If `typo` is missing, it will be read from the "floodam.csv" file in the
first extent of `path[["extent"]]`.
