A simple data type for storing years. Adate_y object is just aninteger with an additional class attribute.
date_y(y)is_date_y(x)as_date_y(x)
| y | year |
|---|---|
| x | any R object |
date_y returns an object of typedate_y
is_date_y returnsTRUE orFALSE depending on whether itsargument is of typedate_y or not.
as_date_m attempts to coerce its argument todate_y type
date_y(2013)#> [1] "2013"as_date_y(2016)#> [1] "2016"