calcWaterYear | R Documentation |
Determine the correct water year based on a calendar date.
calcWaterYear(dateVec)
dateVec |
vector of dates as character ("YYYY-DD-MM"), Date, or POSIXct. Numeric does not work. |
This function calculates a water year based on the USGS definition that a water year starts on October 1 of the year before, and ends on September 30. For example, water year 2015 started on 2014-10-01 and ended on 2015-09-30.
numeric vector indicating the water year
x <- seq(as.Date("2010-01-01"), as.Date("2010-12-31"), by = "month")
calcWaterYear(x)
y <- c("2010-01-01", "1994-02", "1980", "2009-11-01", NA)
calcWaterYear(y)
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