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 Date
vec_type2(x, y)
# S3 method for POSIXt
vec_type2(x, y)
# S3 method for difftime
vec_type2(x, y)
# S3 method for Date
vec_cast(x, to)
# S3 method for POSIXct
vec_cast(x, to)
# S3 method for POSIXlt
vec_cast(x, to)
# S3 method for difftime
vec_cast(x, to)
# S3 method for Date
vec_arith(op, x, y)
# S3 method for POSIXct
vec_arith(op, x, y)
# S3 method for 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.
# NOT RUN {
new_date(0)
new_datetime(0, tzone = "UTC")
new_duration(1, "hour")
# }
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