Is this what you want?

> toto$ans <- difftime(x,y)
> toto
              T1          T2 ans
1 12/31/03 23:49 1/1/04 0:58  69
2    1/1/04 1:14 1/1/04 1:16   2
3    1/1/04 0:02              NA
>



On 1/11/06, bonneu@cict.fr <bonneu@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 Probabilités
> bureau 148  bât. 1R2
> Université Toulouse 3
> 118 route de Narbonne - 31062 Toulouse cedex 9
> bonneu@cict.fr
>
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--
Jim Holtman
Cincinnati, OH
+1 513 247 0281

What the problem you are trying to solve?

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