Neilen Marais wrote:

Hi

Does numeric have a facility to estimate the condition number of a matrix?

Thanks Neilen

The only way I can think of is through SVD:

import RandomArray as RA import LinearAlgebra as LA

n = 100 a = RA.random((n, n)) vt, s, u = LA.singular_value_decomposition(a)

cond2 = s[0] / s[-1] print cond2

The above code computes 2-norm condition number.

Since Numeric has only limited binding to LAPACK you should probably look into SciPy that might have bindings to LAPACK's condition number estimators.

Piotr