Re: A * x = 0 for singular matrix

[Quentin Spencer]

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