Re: Memory exhausted when using \

[marco atzeri]

On 7/16/2012 2:55 PM, Markus Bergholz wrote:
> like that?
>
> octave:1> A=[246 710, 49 260]
> A =
>
>     246   710    49   260
>
> octave:2> B=[49 260, 1]
> B =
>
>      49   260     1
>
> octave:3> A \ B
> ans =
>
>     1.8994e-02   1.0079e-01   3.8764e-04
>     5.4820e-02   2.9088e-01   1.1188e-03
>     3.7834e-03   2.0075e-02   7.7212e-05
>     2.0075e-02   1.0652e-01   4.0970e-04
>
> octave:4>
>
> or am i wrong?
> but updating octave and use an up to date version is always a good idea!
>
> regards
> markus
>
>
> On Mon, Jul 16, 2012 at 2:43 PM, Mathieu Dubois
>  wrote:
> > Hello,
> >
> > I was porting some code from Matlab to Octave but I'm facing a "memory
> > exhausted" error. I'm using Octave 3.2 on a i386 system (I may have access
> > to more powerful systems but I would like to be able to run the code on this
> > machine).
> >
> > This happens when using "\" to solve a linear system. The matrix A is (246
> > 710, 49 260) and b is (49 260, 1).
> >
> > I have seen that Octave have other solvers for linear system. Do you think
> > that may help?
> > Do you have any idea if upgrading to 3.6 could help?
> >
> > Thanks in advance,
> > Mathieu

I suspect he means a matrix with dimension 246710 x 49260
a vector with 49260 x 1

As the matrix is almost 10 Gb no surprise of memory exhausted

Regards
Marco