Various POSIX utilities

POSIXct() mirrors primitive contructors in base R (double(), character() etc.)

is.POSIXt(x)

is.POSIXlt(x)

is.POSIXct(x)

POSIXct(length = 0L, tz = "UTC")

NA_POSIXct_

Arguments

x	an R object
length	A non-negative number specifying the desired length. Supplying an argument of length other than one is an error.
tz	a timezone (defaults to "utc")

Format

An object of class POSIXct (inherits from POSIXt) of length 1.

Value

TRUE if x is a POSIXct or POSIXlt object, FALSE otherwise.

See also

is.instant(), is.timespan(), is.Date()

Examples

is.POSIXt(as.Date("2009-08-03"))
#> [1] FALSE
is.POSIXt(as.POSIXct("2009-08-03"))
#> [1] TRUE