Try :
as.numeric(d)
or also:
unclass(d)
On Wed, May 21, 2008 at 5:04 PM, Martin Hvidberg <[EMAIL PROTECTED]>
wrote:
> I want to find the DOY (Day of Year) of some dates. I think to substract
> the date 1. January from the data to achive this. Something like:
>
> > d <- as.Date("2006-03-13") - as.Date("2006-01-01") +1
> > d
> Time difference of 72 days
>
> So far so good. But d is a 'difftime' object. How do I get an Integer value
> from that?
>
> I tried severel things, incuding the following:
>
> > dd <- as(d,"numeric")
> Error in .classEnv(thisClass) :
> unable to find an environment containing class "difftime"
>
> Sugestions appriciated...
>
> :-) [EMAIL PROTECTED]
>
> ______________________________________________
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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