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From: | Quentin Spencer |
Subject: | Re: A * x = 0 for singular matrix |
Date: | Fri, 23 Feb 2007 16:29:42 -0600 |
User-agent: | Thunderbird 1.5.0.9 (X11/20070212) |
lipschitz82 wrote:
I need to calculate the vector s.t. Ax = 0, for det(A) ~= 0. I've looked at the documentation, octave-forge, etc. but I couldn't find a routine for doing this. Matrix A is pretty big, ie. in the hundreds, but I also have a lot of computer time if the available routine is slow.
Your subject line says A is singular, but your description of the problem says det(A)~=0, which means it is not singular, so which is it? Assuming A is singular, the "null" function will compute a set of basis vectors for the null space of A.
Quentin
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