Would using the subset argument that is available in many functions (eg lm) achieve what you want?
On 30/09/06, Anupam Tyagi <[EMAIL PROTECTED]> wrote: > Is there a way to set NA values in R, without changing the dataframe? I would > like to use different combinations of non-response values, as if they were NA > for some of the computations. I don't want to change the dataframe each time I > have to do this? > Anupam. > > ______________________________________________ > R-help@stat.math.ethz.ch 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. > -- ================================= David Barron Said Business School University of Oxford Park End Street Oxford OX1 1HP ______________________________________________ R-help@stat.math.ethz.ch 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.