No you cannot. You may want to write a merge function with the special capability but there is no better way than the one suggested by Henrique.
On Sep 14, 12:18 pm, JiHO <jo.li...@gmail.com> wrote: > On 2009-September-11 , at 13:55 , wrote: > > > Maybe: > > > do.call(rbind, lapply(with(xy <- rbind(x, y), split(xy, list(a, b), > > drop = TRUE)), tail, 1)) > > > On Fri, Sep 11, 2009 at 3:45 AM, jo <jo.li...@gmail.com> wrote: > > Thanks for the post-processing ideas. But is there any way to do that > > in one step? > > Thanks but by "in one step" I meant within the merge, not in one post- > processing step ;) > > JiHO > ---http://maururu.net > > ______________________________________________ > r-h...@r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ 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.
