ahh...it is the silent substitution of the data frame in the subset statement. I should have known this. (PS: this may not be desirable behavior; maybe it would be useful to issue a warning if the same name is defined in an upper data frame. just an opinion...)
mea misunderstanding. /iaw ______________________________________________ [email protected] 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.
