operate: Arithmetic operations for messydates

In messydates: A Flexible Class for Messy Dates

Arithmetic operations for messydates

Description

These operations allow users to add or subtract dates messydate objects. Messydate objects include incomplete or uncertain dates, ranges of dates, negative dates, and date sets.

Usage

## S3 method for class 'mdate'
e1 + e2

## S3 method for class 'mdate'
e1 - e2

Arguments

e1	A messydate object
e2	A numerical object.

Value

A messydates vector

Examples

d <- as_messydate(c("2008-03-25", "-2012-02-27", "2001-01?", "~2001",
"2001-01-01..2001-02-02", "{2001-01-01,2001-02-02}",
"2008-XX-31", "..2002-02-03", "2001-01-03..", "28 BC"))
tibble::tibble(date = d, add = d + 1, subtract = d - 1)
tibble::tibble(date = d, add = d + "1 year", subtract = d - "1 year")

messydates documentation built on Jan. 22, 2023, 1:36 a.m.