[SciPy-user] solve for symetric matrix ?
Thu Apr 26 10:48:53 CDT 2007
Anne Archibald wrote:
> On 26/04/07, Nils Wagner <email@example.com> wrote:
>> Strange. I have increased the number of unknowns to 5000. What happens
>> with the residual ??
>> Elapsed time LU 28.8819189072
>> Residual 7.64156112039e-14
>> Elapsed time Cholesky 15.6276760101
>> Residual 141.421356237
>> Any idea ?
> Well, roundoff error is always a problem in numerical linear algebra.
> Perhaps use the svd to check your condition number?
> SciPy-user mailing list
Just because you have mentioned the condition number - it would be nice
a built-in function like cond or condest in scipy.
Any comment ?
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