[R] Year and Month extraction from Date object.

Gavin Simpson gavin.simpson at ucl.ac.uk
Thu Oct 29 14:56:39 CET 2009

On Tue, 2009-10-27 at 14:49 -0700, 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?

as.numeric(format(d, format = "%Y"))
as.numeric(format(d, format = "%m"))

and so on.

Look at the formats in ?strftime for further details.



> Thank you.
> Kevin
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