Calculates the Percentage of Normal (PN) on a daily or
monthly precipitation serie.
Usage
pn(object, interval = 30, scale = "a")
Arguments
object
a daily or monthly precipitation serie.
interval
the number of months applied for calculating the percentage of
normal.
scale
the scale used for calculating the percentage of normal,
which should be either "w" for weak (not supported yet),
"m" for month, "s" for season, or "d" for decades.
Value
A data.frame (precintcon.pn) containing the following variables:
year is the year.
month is the month. It exists only whether scale = "m".