[eigen] Large matrix problem |

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*To*: <eigen@xxxxxxxxxxxxxxxxxxx>*Subject*: [eigen] Large matrix problem*From*: "Jian Yang" <Jian.Yang@xxxxxxxxxxx>*Date*: Thu, 1 Jul 2010 16:19:05 +1000*Thread-index*: AcsVWhnoxl3rJH5QTLu6JAqRqg4cVwDipiug*Thread-topic*: Large matrix problem

Hi everyone, I'm trying to create a 14000 x 14000*22 matrix using the following code MatrixXf a=MatrixXf::Zero(14000, 14000*22); The program stopped with the error: "Segmentation fault". I have 64G RAM in my machine. I think I have enough memory to create such matrix. Anyone knows what's going on? Cheers Jian -----Original Message----- From: Listengine [mailto:listengine@xxxxxxxxxxxxxxxxx] On Behalf Of Benoit Jacob Sent: Sunday, 27 June 2010 4:05 AM To: eigen@xxxxxxxxxxxxxxxxxxx Subject: Re: [eigen] [patch] LDLt decomposition with rank-deficient matrices Hey Ben, Thanks for the patches and sorry that I don't have time to look at them today: we are currently in an incredible rush to get beta1 out the door, and that means a lot of documentation work. I think that your stuff is OK to apply post-beta1 anyway. Just wanted to let you know why we might have long response times these days. Benoit 2010/6/26 Ben Goodrich <bgokgm@xxxxxxxxxxxxxx>: > Hi, > > On Fri, Jun 25, 2010 at 1:50 AM, Ben Goodrich <bgokgm@xxxxxxxxxxxxxx> wrote: >>>> 5) I copied-and-pasted a block inside /test/cholesky.cpp and exercised >>>> the pivot=false option. It seems to work when you do ./check.sh >>>> cholesky. I did some other tests locally with singular matrices, but >>>> /test/cholesky.cpp does not seem to have any tests with singular >>>> matrices, so maybe some should be added? >>> >>> why not. >> >> I have not added the singular tests yet, but I can do that soon. >> > > This patch does so. It seems to work okay with both the Pivoting and > NoPivoting options from the previous patch. > >>> You should also make the solve function skips the transpositions when >>> no pivoting has been computed. >> >> I have not done this yet either. What did you decide about making a >> new class versus putting a flag in the class definition? > > Gael? > > Thanks, > Ben >

**Follow-Ups**:**Re: [eigen] Large matrix problem***From:*Christoph Keller

**Re: [eigen] Large matrix problem***From:*Helmut Jarausch

**Re: [eigen] Large matrix problem***From:*Manoj Rajagopalan

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