Hi
> Hi all,
>
> I would like create a new column in a data.frame (a1) to store 0, 1 data
> converted from a factor as below.
>
> a1$h2<-NULL
> for (i in 1:dim(a1)[1]) {
> if (a1$h1[i]=="H") a1$h2[i]<-1 else a1$h2[i]<-0
> }
>
> My question: is it possible to remove the loop from above code to
achieve
> the desired result?
Untested
a1$h2 <- (a1$h1=="H")*1
Regards
Petr
>
> Thanks in advance,
> Jin
>
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