Hi
why do you insist on loops. R is not C. If you want to use loops use C or
similar programming languages. It is almost always better to apply whole
object approach. Kind and clever people already programmed it (sometimes
in C ).
x<-rnorm(20)
x[c(10,12,13,17)]<-NA
x
[1] -1.12423790 0.80641
Hi
r-help-boun...@r-project.org napsal dne 28.07.2010 11:30:48:
> Hi
>
> I am trying to modify a data frame D with lists x and y in such a way
that if
> a value in x==0 then it should replace that value with the last not zero
valuein x. I.e.
>
> for loop over i{
> if(D$x[i]==0)
> D$x[i]
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