On 1 June 2010 11:34, Peter Ehlers <ehl...@ucalgary.ca> wrote: > Or, for a very slight further reduction in time in > the case of larger matrices/vectors: > > as.vector(tcrossprod(V, xyzs)) > > I mention this merely to remind new users of the > excellent speed of [t]crossprod(). > > -Peter Ehlers
Thanks, I've been using t(x)%*%y for several years now, and had never found out there was a faster and more straight-forward function for this. Perhaps a link to [t]crossprod could be added on the help page for ?"%*%". Best, baptiste ______________________________________________ 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.
