On Nov 29, 2006, at 7:54 PM, Martin Morgan wrote: >> http://en.wikipedia.org/wiki/Empty_set >> which says, in part: >> Operations on the empty set > <...> > 'any' is like 'sum', 'all' is like 'prod'. > > Martin
Thank you very much Martin. It's clear now. Benilton ______________________________________________ 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.
