[SciPy-user] Using fmin_slsqp

Husain, Kamran B kamran.husain@aramco....
Tue Jan 6 13:21:52 CST 2009


Hello,

While attempting to use fmin_slsqp, I keep getting an error "Error imode = 6 Singular Matrix C in LSQ subproblem".

The same constraints (upper bound, lower bound) and a very simple sum(xvector) minimization function work well in Matlab using fmincon. I want to convince our users to use Scipy instead (for ease of programming in the future.
Unfortunately, even a small exercise such as this one is proving to be impossible

The results from the cobyla call for a similar try yielded results from a local minima other than found by fmincom.

I have seen the really trivial examples in the ticket #570, but does someone have a more concrete example or could point me in the right direction?

Thanks,
Kamran

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