Re: A\b

[David Bateman]

Jaroslav Hajek wrote:
> On Thu, Jun 17, 2010 at 10:09 AM, Jaana Tommiska
> <address@hidden> wrote:
>   
> > hi,
> > what algorithm octave use to calculate A\b (A is a regtangular matrixm b is a 
> > vector) ?
> > thanks
> > Jaana
> >
> >     
>
> If A is nonsquare, it uses LAPACK's xGELSD, i.e. SVD-based least
> squares solution.
>
> see
>
> http://www.netlib.org/lapack/lug/node27.html
>
> hth
>
>   
The solvers used in which situation are described in

http://www.gnu.org/software/octave/doc/interpreter/Techniques-used-for-Linear-Algebra.html

for dense matrices and in

http://www.gnu.org/software/octave/doc/interpreter/Sparse-Linear-Algebra.html

for sparse matrices

D.

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