A date (Date) is a double vector. Its value represent the number
of days since the Unix "epoch", 1970-01-01. It has no attributes.
A datetime (POSIXct is a double vector. Its value represents the
number of seconds since the Unix "Epoch", 1970-01-01. It has a single
attribute: the timezone (tzone))
A duration (difftime)
new_date(x = double())
new_datetime(x = double(), tzone = "")
new_duration(x = double(), units = c("secs", "mins", "hours", "days", "weeks"))
# S3 method for class 'Date'
vec_ptype2(x, y, ...)
# S3 method for class 'POSIXct'
vec_ptype2(x, y, ...)
# S3 method for class 'POSIXlt'
vec_ptype2(x, y, ...)
# S3 method for class 'difftime'
vec_ptype2(x, y, ...)
# S3 method for class 'Date'
vec_cast(x, to, ...)
# S3 method for class 'POSIXct'
vec_cast(x, to, ...)
# S3 method for class 'POSIXlt'
vec_cast(x, to, ...)
# S3 method for class 'difftime'
vec_cast(x, to, ...)
# S3 method for class 'Date'
vec_arith(op, x, y, ...)
# S3 method for class 'POSIXct'
vec_arith(op, x, y, ...)
# S3 method for class 'POSIXlt'
vec_arith(op, x, y, ...)
# S3 method for class 'difftime'
vec_arith(op, x, y, ...)A double vector representing the number of days since UNIX
epoch for new_date(), number of seconds since UNIX epoch for
new_datetime(), and number of units for new_duration().
Time zone. A character vector of length 1. Either "" for
the local time zone, or a value from OlsonNames()
Units of duration.
These function help the base Date, POSIXct, and difftime classes fit
into the vctrs type system by providing constructors, coercion functions,
and casting functions.
new_date(0)
#> [1] "1970-01-01"
new_datetime(0, tzone = "UTC")
#> [1] "1970-01-01 UTC"
new_duration(1, "hours")
#> Time difference of 1 hours