[R] Year and Month extraction from Date object.

[Prof Brian Ripley]

?weekdays contains

Note:

      Other components such as the day of the month or the year are very
      easy to compute: just use ‘as.POSIXlt’ and extract the relevant
      component.

(d <- Sys.Date())
1900 + as.POSIXlt(d)$year
1 + as.POSIXlt(d)$mon

should get you started.

On Tue, 27 Oct 2009, rkevinburton at charter.net wrote:

> Hello,
>
> I have seen much discussion on Date. But I can't seem to do this 
> simple operation. I can convert a string to a date:
>
> d <- as.Date(DATE, format="%m/%d/%Y")
>
> But what I want to do is extract the year and month so I can 
> construct an element in a ts object. Ideally I would like to see 
> d$year but that doesn't seem to be available. Once I have a Date 
> object how can I get an integer year?
>
> Thank you.
>
> Kevin

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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