[SciPy-user] another optimization oddity
Steve M. Robbins
steven.robbins at videotron.ca
Fri Apr 5 10:10:29 EST 2002
On Fri, Apr 05, 2002 at 04:55:24PM +0200, Henk Jansen wrote:
> As the owner of this prpblem I did some homework. I guess I've found a
> bug in "scipy.minpack.leastsq.py" :
Speaking of odd things in scipy.optimize ...
I have a problem that is too large for the typical O(N^2) methods, so I
implemented steepest descent and nonlinear conjugate gradient methods.
I wanted to use the function line_search() in optimize.py, but I am
mystified by its use of the zoom() function:
def zoom(a_lo, a_hi):
pass
That looks like an uncompleted stub function to me. Correct?
[I don't have Wright & Nocedal on hand to check the details of their
line search.]
-S
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