But that's dropping unused factor levels, not the drop of `[` Michael
On Wed, Feb 15, 2012 at 9:16 AM, David Winsemius <dwinsem...@comcast.net> wrote: > > On Feb 15, 2012, at 7:19 AM, R. Michael Weylandt wrote: > >> Sorry about that -- forgot the case where you might only have a >> certain entry once: try this, >> >> sapply(split(GS, rownames(GS)), function(x) colSums(as.matrix(x))) >> >> or >> >> sapply(split(GS, rownames(GS)), function(x) if(is.matrix(x)) colSums(x) >> else x) >> >> I'm not sure if there's a way to force split to give you matrix >> elements back but it would be nice. > > > The help(split) page says there is a 'drop' parameter. That would have been > what I tried first. > > -- > > David Winsemius, MD > West Hartford, CT > ______________________________________________ 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.
