[R] if negative value, make zero

[Joshua Wiley]

Hi,

It did not return the results you wanted because you tried to feed the
entire data frame to ifelse().  Does something like this do what you
want?

apply(tempr, 2, function(x) {ifelse(x < 0, 0, x)})


Josh

On Fri, May 28, 2010 at 8:37 AM,  <ecvetano at uwaterloo.ca> wrote:
> I have a data frame with both positive and negative values, and I want to
> make all the negative values equal zero, so i can eventually take an
> average.
> I've tried
> temp2 <- ifelse(tempr<0, 0, tempr)
> but it doesn't seem to work.
>
> Any suggestions?
>
> Thanks!
>
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-- 
Joshua Wiley
Senior in Psychology
University of California, Riverside
http://www.joshuawiley.com/