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From: | David Bateman |
Subject: | Re: A\b |
Date: | Thu, 17 Jun 2010 21:02:25 +0200 |
User-agent: | Mozilla-Thunderbird 2.0.0.22 (X11/20090706) |
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 JaanaIf 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. -- David Bateman address@hidden 35 rue Gambetta +33 1 46 04 02 18 (Home) 92100 Boulogne-Billancourt FRANCE +33 6 72 01 06 33 (Mob)
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