That should have been:
do.call("rbind", by(iris[-5], iris$Species, colMeans))
On Feb 12, 2008 1:46 PM, Gabor Grothendieck <[EMAIL PROTECTED]> wrote:
> Please provide reproducible code. Try this:
>
> do.call("rbind", by(iris, iris$Species, colMeans))
>
>
> On Feb 12, 2008 1:34 PM, Allen S. Rout <[EMAIL PROTECTED]> wrote:
> > "Gabor Grothendieck" <[EMAIL PROTECTED]> writes:
> >
> > > The point is don't use cbind -- use data.frame.
> >
> > Is there a conventional way to use data.frame instead of cbind when
> > processing a 'by'?
> >
> > My code is littered with:
> >
> > foo <- data.frame(cbind(by( /* yadda */ )))
> >
> > and I've had a problem similar to the Original Poster, resulting in
> > some ugly reordering, so I do the as.POSIXct _after_ the
> > data.frame(cbind())
> >
> >
> >
> > - Allen S. Rout
> >
> >
> > ______________________________________________
> > 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.
> >
>
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