View source: R/accessors-year.r
year | R Documentation |
Date-time must be a POSIXct, POSIXlt, Date, Period or any other object convertible to POSIXlt.
isoyear()
returns years according to the ISO 8601 week calendar.
epiyear()
returns years according to the epidemiological week calendars.
year(x)
year(x) <- value
isoyear(x)
epiyear(x)
x |
a date-time object |
value |
a numeric object |
year does not yet support years before 0 C.E.
the years element of x as a decimal number
https://en.wikipedia.org/wiki/ISO_week_date
x <- ymd("2012-03-26")
year(x)
year(x) <- 2001
year(x) > 1995
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