R help - May 2010 - if negative value, make zero

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!

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!
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Joshua Wiley
Senior in Psychology
University of California, Riverside
http://www.joshuawiley.com/

temp2 = tempr
temp2[temp2<0] = 0

HTH



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!
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>