Re: [R] using mclapply (multi core apply) to do matrix multiplication

2012-02-07 Thread Alaios
rpm package to do the work nice and "transparently"? B.R Alex From: Rainer M Krug Cc: Ernest Adrogué ; "r-help@r-project.org" Sent: Tuesday, February 7, 2012 12:08 PM Subject: Re: [R] using mclapply (multi core apply) to do matrix multipl

Re: [R] using mclapply (multi core apply) to do matrix multiplication

2012-02-07 Thread Spencer Graves
What is the nature of the matrices? Are they sparse or derived from sparse matrices? If they are sparse, have you looked at the packages available in R for sparse matrices? library(sos) summary(sp <- findFn('sparse', 999)) will identify help pages in contri

Re: [R] using mclapply (multi core apply) to do matrix multiplication

2012-02-07 Thread Ernest Adrogué
7-02-2012, 03:32 (-0800); Alaios escriu: > I wouldl ike to thank you for your response. The hardest part in the > installation is to find a BLAS library to install. If I understand > it right once I install BLAS then I only need to change a flag in > the ./configure of R installation.. > > > Our

Re: [R] using mclapply (multi core apply) to do matrix multiplication

2012-02-07 Thread Ernest Adrogué
7-02-2012, 02:31 (-0800); Alaios escriu: > I would like to thank you Ernest for your answer. I guess that this > is gonna be faster as right now R only sees one core. In my work > there is a system with 64 cores and you can see only one working. If > I understand it right a [m,n][n,k] matrix multi

Re: [R] using mclapply (multi core apply) to do matrix multiplication

2012-02-07 Thread Rainer M Krug
; "r-help@r-project.org" *Sent:* Tuesday, February 7, 2012 11:44 AM *Subject:* Re: [R] using mclapply (multi core apply) to do matrix multiplication On 07/02/12 11:31, Alaios wrote: > I would like to thank you Ernest for your answer. I guess that this > is gonna be faster as righ

Re: [R] using mclapply (multi core apply) to do matrix multiplication

2012-02-07 Thread Alaios
Cc: Ernest Adrogué ; "r-help@r-project.org" Sent: Tuesday, February 7, 2012 11:44 AM Subject: Re: [R] using mclapply (multi core apply) to do matrix multiplication On 07/02/12 11:31, Alaios wrote: > I would like to thank you Ernest for your answer. I guess that this > is gonna be

Re: [R] using mclapply (multi core apply) to do matrix multiplication

2012-02-07 Thread Rainer M Krug
st for these kind of questions. Cheers, Rainer Would that be too weird for mclapply to handle? B.R Alex From: Ernest Adrogué To: r-help@r-project.org Sent: Tuesday, February 7, 2012 11:02 AM Subject: Re: [R] using mclapply (multi core apply) to do matrix multi

Re: [R] using mclapply (multi core apply) to do matrix multiplication

2012-02-07 Thread Alaios
: Re: [R] using mclapply (multi core apply) to do matrix multiplication 7-02-2012, 00:29 (-0800); Alaios escriu: > Dear all, I am trying to multiply three different matrices and each > matrice is of size 16384,16384 the normal %*% multiplciation > operator has not finished one day now

Re: [R] using mclapply (multi core apply) to do matrix multiplication

2012-02-07 Thread Ernest Adrogué
7-02-2012, 00:29 (-0800); Alaios escriu: > Dear all, I am trying to multiply three different matrices and each > matrice is of size 16384,16384 the normal %*% multiplciation > operator has not finished one day now. As I am running a system with > many cores (and it seems that R is using only one o

[R] using mclapply (multi core apply) to do matrix multiplication

2012-02-07 Thread Alaios
Dear all, I am trying to multiply three different matrices and each matrice is of size 16384,16384 the normal %*% multiplciation operator has not finished one day now. As I am running a system with many cores (and it seems that R is using only one of those) I would like to write fast a brief fun