I do think this is worth a warning.
mean.default could do something like
if (length(list(...)) > 0) warning("extra arguments ignored")The same could also apply to many other methods of S3 generic functions which are forced to include the formal argument `...` in the signature but do not use it. Felix On 8/19/07, Matthew Walker <[EMAIL PROTECTED]> wrote: > Hi, > > I was *very* surprised by this little trick for new players: mean() only > considers its first argument! > > > mean(1,1,2) > [1] 1 > > mean(2,1,1) > [1] 2 > > > I found this very different behaviour to max(): > > > max(1,1,2) > [1] 2 > > max(2,1,1) > [1] 2 > > > > Perhaps this is the wrong list to ask, but does anyone else think this a > little on the interesting side? Is it not possible to detect a first > argument of length one in the presence of other un-named arguments and > at least produce a warning? > > > Cheers, > > > Matthew > > ______________________________________________ > 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. > -- Felix Andrews / 安福立 PhD candidate Integrated Catchment Assessment and Management Centre The Fenner School of Environment and Society The Australian National University (Building 48A), ACT 0200 Beijing Bag, Locked Bag 40, Kingston ACT 2604 http://www.neurofractal.org/felix/ voice:+86_1051404394 (in China) mobile:+86_13522529265 (in China) mobile:+61_410400963 (in Australia) xmpp:[EMAIL PROTECTED] 3358 543D AAC6 22C2 D336 80D9 360B 72DD 3E4C F5D8 ______________________________________________ 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.
