[Rd] matrix multiplication speed R
Hi, A quick bench-mark of an R matrix muliplication 500by500 X 500by1, all random variates, with matlab reveals a huge difference in speed (5 times at least). Is there anything that can be done in R to speed up the multiplication? Kind regards, Oyvind -- View this message in context: http://r.789695.n4.nabble.com/matrix-multiplication-speed-R-tp3217257p3217257.html Sent from the R devel mailing list archive at Nabble.com. __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] matrix multiplication speed R
Thanks very much, Uwe. The calculation time is now comparable with matlab. Oyvind -- View this message in context: http://r.789695.n4.nabble.com/matrix-multiplication-speed-R-tp3217257p3217539.html Sent from the R devel mailing list archive at Nabble.com. __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
[Rd] Max likelihood using GPU
Dear all, Probably many of you experience long computation times when estimating large number of parameters using maximum likelihood with functions that reguire numerical methods such as integration or root-finding. Maximum likelihood is an example of paralellization that could sucessfully utilize GPU. The general algorithm is described here: http://openlab-mu-internal.web.cern.ch/openlab-mu-internal/03_Documents/4_Presentations/Slides/2010-list/CHEP-Maximum-likelihood-fits-on-GPUs.pdf. Is it possible to implement this algorithm in R ? Kind regards, Oyvind Foshaug -- View this message in context: http://r.789695.n4.nabble.com/Max-likelihood-using-GPU-tp3532034p3532034.html Sent from the R devel mailing list archive at Nabble.com. __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
[Rd] Error using RcppGSL
Hi, I get an error using RcppGSL: fatal error: gsl/gsl_vector.h:No such file or directory. What is the best way to install these files as they seem to be missing? Thanks, Oyvind -- View this message in context: http://r.789695.n4.nabble.com/Error-using-RcppGSL-tp3613535p3613535.html Sent from the R devel mailing list archive at Nabble.com. __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
