My bad.. these are the real matrices
> G<-DiagonalGaussian( NumberOfImagePixels,sd=Gsd) > str(G) num [1:16384, 1:16384] 1400 0 0 0 0 ... > S<-PointSamplingMatrix(EffectiveSensors,NumberOfImagePixels) > str(S) num [1:10650, 1:16384] 0 0 0 0 0 0 0 0 0 0 ... > A<-S %*% G ________________________________ From: R. Michael Weylandt <michael.weyla...@gmail.com> Cc: Paul Hiemstra <paul.hiems...@knmi.nl>; "R-help@r-project.org" <R-help@r-project.org> Sent: Monday, February 6, 2012 3:39 PM Subject: Re: [R] R enterprise for linux Are you sure? I just ran N <- 128 system.time(matrix(rnorm(N^2),N) %*% matrix(rnorm(N^2),N)) and it took less than 0.044s on my (old-ish) laptop while doing other things (and that includes the expensive rng calls). There might be some other issues in play here. Even N <- 1280 takes < 5 seconds with the rng call. Michael > Actually, I would like to speed up matrix multiplication > > which is really too slow. > MatrixA %*% MatrixB (each one is a [128,128] table) is running four hours > now... and just imagine that I want to calculate many of those. > > Which other alternative do I have? > > Regards > Alex > > > ________________________________ > From: Paul Hiemstra <paul.hiems...@knmi.nl> > > Cc: "R-help@r-project.org" <R-help@r-project.org> > Sent: Monday, February 6, 2012 2:30 PM > Subject: Re: [R] R enterprise for linux > > > Dear Alex, > > By Enterprise R, do you mean Revolution R? I can also only find red > hat packages. You could send them an e-mail to ask for sources. They > probably want to help you, especially when you pay. But why do you > need RevoR and not standard R. > > Paul > > On 02/06/2012 12:55 PM, Alaios wrote: > Dear all, > I would like to ask you if it would be possible to install R enterprise in > opensuse. > Actually it seems that there are only Red Hat packages and I was wondering if > their source code is available so one to try and compile it. I would like to > thank you in advance for your reply Regards > Alex [[alternative HTML version deleted]] >> > ______________________________________________ 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. > > > -- > Paul Hiemstra, Ph.D. > Global Climate Division > Royal Netherlands Meteorological Institute (KNMI) > Wilhelminalaan 10 | 3732 GK | De Bilt | Kamer B 3.39 > P.O. Box 201 | 3730 AE | De Bilt > tel: +31 30 2206 494 http://intamap.geo.uu.nl/~paul > http://nl.linkedin.com/pub/paul-hiemstra/20/30b/770 > [[alternative HTML version deleted]] > > > ______________________________________________ > 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. > [[alternative HTML version deleted]]
______________________________________________ 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.
