r - Increment a date by some time period -

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when using "+" operator increment date (or date-time), how specify increment in days (or months, or weeks, or years)?

> sys.date() [1] "2013-08-23" > sys.date() + 1 [1] "2013-08-24" > isodate(2013,8,23) [1] "2013-08-23 12:00:00 gmt" > isodate(2013,8,23) + 1 [1] "2013-08-23 12:00:01 gmt"

use lubridate::days

> require(lubridate) > sys.date() [1] "2013-08-23" > sys.date() + days(1) [1] "2013-08-24" > isodate(2013, 8, 23) [1] "2013-08-23 12:00:00 gmt" > isodate(2013, 8, 23) + days(1) [1] "2013-08-24 12:00:00 gmt"

with lubridate, can use years(), seconds(), etc., or define own duration.


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