[SciPy-user] Getting started with optimize.fmin_l_bfgs_b
Christian Kristukat
ckkart at hoc.net
Wed Jun 29 05:54:13 EDT 2005
Nils Wagner wrote:
> Traceback (most recent call last):
> File "bfgs_b.py", line 8, in ?
> best, val, d = optimize.fmin_l_bfgs_b(func, guess, bounds=bounds)
> File "/usr/local/lib/python2.4/site-packages/scipy/optimize/lbfgsb.py",
> line 183, in fmin_l_bfgs_b
> f[0], g = func_and_grad(x)
> File "/usr/local/lib/python2.4/site-packages/scipy/optimize/lbfgsb.py",
> line 135, in func_and_grad
> f, g = func(x, *args)
> TypeError: unpack non-sequence
>
> How can I resolve the problem ?
Look at the docstring of l_bfgs_b - func is expected to return the function and
its gradient!
Regards, Christian
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