Re: [Rd] matrix multiplication speed R

2011-05-10 Thread aftar
Hi Can we use BLAS in R X64 for windows? Regards Aftar -- View this message in context: http://r.789695.n4.nabble.com/matrix-multiplication-speed-R-tp3217257p3509596.html Sent from the R devel mailing list archive at Nabble.com. __ R-devel@r-project.

Re: [Rd] matrix multiplication speed R

2011-05-10 Thread Prof Brian Ripley
On Mon, 9 May 2011, Sharpie wrote: aftar wrote: Hi Can we use BLAS in R X64 for windows? Regards Aftar You are already using BLAS in R as R includes its own BLAS library. On Windows the 64-bit DLL is located at R_HOME\bin\x64\Rblas.dll. If you are asking about swapping that out for an o

Re: [Rd] matrix multiplication speed R

2011-05-09 Thread Sharpie
aftar wrote: > > Hi > > Can we use BLAS in R X64 for windows? > > Regards > Aftar > You are already using BLAS in R as R includes its own BLAS library. On Windows the 64-bit DLL is located at R_HOME\bin\x64\Rblas.dll. If you are asking about swapping that out for an optimized BLAS, you will

Re: [Rd] matrix multiplication speed R

2011-01-14 Thread oyvfos
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. ___

Re: [Rd] matrix multiplication speed R

2011-01-14 Thread Uwe Ligges
On 14.01.2011 11:38, Joris Meys wrote: 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

Re: [Rd] matrix multiplication speed R

2011-01-14 Thread Joris Meys
Please give the code you used for the matrix multiplication. 5 times is a bit much. On Fri, Jan 14, 2011 at 9:09 AM, oyvfos wrote: > > 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 >

[Rd] matrix multiplication speed R

2011-01-14 Thread oyvfos
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:/