
Date()
mirrors primitive constructors in base R (double()
, character()
etc.)
is.Date(x)Date(length = 0L)
NA_Date_
An object of class Date
of length 1.
an R object
A non-negative number specifying the desired length. Supplying an argument of length other than one is an error.
is.instant()
, is.timespan()
, is.POSIXt()
, POSIXct()
is.Date(as.Date("2009-08-03")) # TRUE
is.Date(difftime(now() + 5, now())) # FALSE
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