On 04/28/2011 09:53 PM, Benjamin Caldwell wrote:
rws50<- subset(rw.fire.RW,shigo.av<50)
quick and dirty would be to replace all NAs with -99999 (or similar), use subset, and set all values ==-99999 in the subset back to NA. There may be more elegant solutions, though.
Jannis ______________________________________________ R-help@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.