R: Operators on the Date Class

Ops.Date {base}

R Documentation

Operators on the Date Class

Operators for the "Date" class.

There is an Ops method and specific methods for + and - for the Date class.

date + x
x + date
date - x
date1 lop date2

`date`	date objects
`date1, date2`	date objects or character vectors. (Character vectors are converted by `as.Date`.)
`x`	a numeric vector (in days) or an object of class `"difftime"`, rounded to the nearest whole day.
`lop`	One of `==`, `!=`, `<`, `<=`, `>` or `>=`.

x does not need to be integer if specified as a numeric vector, but see the comments about fractional days in the help for Dates.

(z <- Sys.Date())
z + 10
z < c("2009-06-01", "2010-01-01", "2015-01-01")

[Package base version 2.15.1 Index]