[R] Datetimes differences

[Gabor Grothendieck]

Try difftime(x,y,unit="min") or as.numeric(difftime(x,y,unit="min"))
depending on what you want.

On 1/11/06, bonneu at cict.fr <bonneu at cict.fr> 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
>
> what is to be done ?
> Thanks.
>
> Florent Bonneu
> Laboratoire de Statistique et Probabilités
> bureau 148  bât. 1R2
> Université Toulouse 3
> 118 route de Narbonne - 31062 Toulouse cedex 9
> bonneu at cict.fr
>
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