[SciPy-Dev] distributions.ncf.fit -- never converges?

[josef.pktd at gmail.com]

2011/4/13 Yaroslav Halchenko <lists at onerussian.com>:
> Thanks Josef for the confirmation and making your computer sweat ;)
>
> I have built current master
>
> *In [3]: scipy.__version__
> Out[3]: '0.10.0.dev'
>
> the same story.

The default starting parameters have changed. If your example worked
before, then it's possible that it works with explicit starting
parameters.

(I haven't figured out yet how to make my new computer sweat.)

Josef


>
> apparently it is known to some degree -- ncf is skipped the unittesting:
>
> $> git grep -A 10 'TestFitMethod'
> scipy/stats/tests/test_distributions.py:class TestFitMethod(TestCase):
> scipy/stats/tests/test_distributions.py-    skip = ['ncf']
> scipy/stats/tests/test_distributions.py-
> scipy/stats/tests/test_distributions.py-    @dec.slow
> scipy/stats/tests/test_distributions.py-    def test_fit(self):
> scipy/stats/tests/test_distributions.py-        for func, dist, args, alpha in test_all_distributions():
> scipy/stats/tests/test_distributions.py-            if dist in self.skip:
> scipy/stats/tests/test_distributions.py-                continue
>
> $> git show ba349771
> commit ba349771afebb1473a961139570da770ada59032
> Author: Travis Oliphant <oliphant at enthought.com>
> Date:   Tue Jun 1 07:59:20 2010 +0000
>
>    Add tests for fit method including fixing input parameters.
>
>
> ;-) :-/
>
> On Wed, 13 Apr 2011, josef.pktd at gmail.com wrote:
>
>> >  python -c 'import scipy.stats.distributions as ssd, numpy as np; d=ssd.ncf; d.fit(np.array([-0.03756533,  0.18115522,  0.06605958, -0.09195276,  0.06162608, 0.07139736, -0.1570828 , -0.11967677, -0.19186652,  0.29411319]));'
>
>> I only have 0.9.0, I forgot to kill the process and 1 hour 22 minutes
>> of cpu time later it still hadn't returned.
>> At least a maximum iteration or maximum function evaluation should
>> have stopped it.
>
>> Josef
> --
> =------------------------------------------------------------------=
> Keep in touch                                     www.onerussian.com
> Yaroslav Halchenko                 www.ohloh.net/accounts/yarikoptic
> _______________________________________________
> SciPy-Dev mailing list
> SciPy-Dev at scipy.org
> http://mail.scipy.org/mailman/listinfo/scipy-dev
>