messydates (version 0.5.4)

operate_inequalities: Logical operations on messy dates

Description

Logical operations on messy dates

Usage

# S3 method for mdate
<(e1, e2)
# S3 method for mdate
>(e1, e2)
# S3 method for mdate
<=(e1, e2)
# S3 method for mdate
>=(e1, e2)

Arguments

e1, e2

mdate or other class objects

Functions

• < : tests whether the dates in the first vector precede the dates in the second vector. Returns NA when the date order can't be determined.

• > : tests whether the dates in the first vector succeed the dates in the second vector. Returns NA when the date order can't be determined.

• <= : tests whether the dates in the first vector are equal to or precede the dates in the second vector. Returns NA when the date order can't be determined.

• >= : tests whether the dates in the first vector are equal to or succeed the dates in the second vector. Returns NA when the date order can't be determined.

Examples

as_messydate("2012-06-02") > as.Date("2012-06-01") # TRUE
# 2012-06-XX could mean 2012-06-03, so unknown if it comes before 2012-06-02
as_messydate("2012-06-XX") < as.Date("2012-06-02") # NA
# But 2012-06-XX cannot be before 2012-06-01
as_messydate("2012-06-XX") >= as.Date("2012-06-01") # TRUE