On Wed, 11 Jan 2006 [EMAIL PROTECTED] wrote:
> I want to obtain datetime differences in mins in an other column, in front of
> my
> datetimes. I have tried this :
>
> T1 <- c("12/31/03 23:49","1/1/04 1:14","1/1/04 0:02")
> T2 <- c("1/1/04 0:58","1/1/04 1:16","")
> toto <- data.frame(T1,T2)
> toto
>
> y <- strptime(T1,"%m/%d/%y %H:%M")
> x <- strptime(T2,"%m/%d/%y %H:%M")
> difftime(x,y)
>
>
> but, i don't know how can i do in order to obtain something like this :
>
> ans <- c(69,2,NA)
> res <- data.frame(T1,T2,ans)
> res
data.frame(T1, T2, mins=as.numeric(difftime(x,y, units="mins")))
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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