Generate Water Year(WY) tags based on a POSIX date and specified last month of the WY.

Generate Water Year(WY) tags based on a POSIX date and specified last month of the WY.

wygen(dates, last_month = 4)

Arguments

dates	character date that passes coercion to POSIX formatting
last_month	numeric last month of water year

Examples

dates <- "2014-01-01"
dates <- "2015-09-14"
wygen(dates)
#> $wy
#> [1] 2016
#> 
#> $wy_month
#> [1] 5
#>