[SciPy-user] fmin won't optimize

Pearu Peterson pearu at scipy.org
Mon Nov 8 04:31:02 CST 2004



On Mon, 8 Nov 2004, Yaroslav Bulatov wrote:

> Sorry, for the double send, I was confused by the "message awaits
> moderator approval" replies.
>
> Yes, if I change starting parameter to be [0.,0.,0.] instead of
> [0,0,0] fmin and fmin_powell find the same optimum. I guess fmin
> doesn't cast them to floats?

As I said, this is fixed in Scipy. The issue was related to the fact
that in fmin `x0 = asarray(x0)` caused x0 to be integer array and latter
x0.typecode() was used to create an array that should have been a float 
array.

Pearu



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