Conjugate gradients minimizer

[Fernando Perez]

Andrew Walkingshaw wrote:

> Hi. Ages since I last posted to c.l.p, and this is a long shot, but here
> goes.
> 
> Does anyone have a conjugate-gradients minimization routine (failing
> that, even a line-search-using-gradients algorithm would be extremely
> useful):
> 
> a) in "pure" python (NumPy is *just about* OK for my purposes; C
> extensions aren't);

Google is your friend: 
http://w3.pppl.gov/~pletzer/papers-reports/python9paper/ellipt2d.html

Their code is downloadable (I haven't checked the license though).

Cheers,

f.