new_date: Date, date-time, and duration S3 classes

In vctrs: Vector Helpers

Date, date-time, and duration S3 classes

Description

• 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)

Usage

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, ...)

Arguments

x	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().
tzone	Time zone. A character vector of length 1. Either "" for the local time zone, or a value from OlsonNames()
units	Units of duration.

Details

These function help the base Date, POSIXct, and difftime classes fit into the vctrs type system by providing constructors, coercion functions, and casting functions.

Examples

new_date(0)
new_datetime(0, tzone = "UTC")
new_duration(1, "hours")

vctrs documentation built on Oct. 13, 2023, 1:05 a.m.