On Fri, 07 Oct 2005 18:01:41 -0400 Dhiren DSouza wrote:
> Hello:
>
> I have a matrix 'dat' with 2 columns.
>
> I have the following code:
>
> for (i in 1:nrows(dat))
> {
> if (dat[i,1] < dat[i,2])
> {
> dat[i,2]<-0
> }
>
> else
> {
> dat[i,2]<-1
> }
>
> Is there a way to accomplish this without the for loop?
For this setting
dat[,2] <- as.numeric(dat[,1] >= dat[,2])
seems to work.
For more complicated tasks look at ifelse().
hth,
Z
> Thank you.
>
> -Dhiren
>
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