4 messages · Joris Meys, Uwe Ligges, oyvfos
Hi, A quick bench-mark of an R matrix muliplication 500by500 X 500by10000, 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
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Please give the code you used for the matrix multiplication. 5 times is a bit much.
No, it is reasonable for matrix multiplication: Matlab ships with optimized BLAS for various CPU types. In R, you have to get an optimized BLAS yourself. How to link against optimized BLAS versions or how to substitute the BLAS is mentioned in the R INstallation and Administration manual. Best, Uwe Ligges
On Fri, Jan 14, 2011 at 9:09 AM, oyvfos<oyvfos at yahoo.no> wrote:
Hi, A quick bench-mark of an R matrix muliplication 500by500 X 500by10000, 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.
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Thanks very much, Uwe. The calculation time is now comparable with matlab. Oyvind
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