[Scipy-tickets] [SciPy] #1359: stats distributions fit problems

SciPy Trac scipy-tickets@scipy....
Fri Jan 14 18:50:08 CST 2011


#1359: stats distributions fit problems
-------------------------+--------------------------------------------------
 Reporter:  josefpktd    |       Owner:  somebody
     Type:  defect       |      Status:  new     
 Priority:  normal       |   Milestone:  0.10.0  
Component:  scipy.stats  |     Version:  0.8.0   
 Keywords:               |  
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 Just to collect some problems with distribution fit with default settings
 (.fit(rvs)). Running a script similar to test_fit.py in stats/test
 sample size 1000, generated with rvs of the distribution.

 ncf seems to take forever, I killed it and removed it from my script
 wrapcauchy raises exception in _fitstart when it calls stats without any
 valid arguments

 distributions with nans in result,
 second element is args, loc=0, scale=1 (default)
 last element is estimate


 {{{
 ('alpha', (3.5704770516650459,), (1.0, nan, 0.0))
 ('betaprime', (5, 6), (1.0, 1.0, nan, 0.0))
 ('burr', (10.5, 4.2999999999999998), (1.0, 1.0, nan, nan))
 ('cauchy', (), (nan, 0.0))
 ('f', (29, 18), (1.0, 1.0, nan, 0.0))
 ('fisk', (3.0857548622253179,), (1.0, nan, nan))
 ('foldcauchy', (4.7164673455831894,), (1.0, nan, 0.0))
 ('genpareto', (0.10000000000000001,), (1.0, nan, 0.0))
 ('halfcauchy', (), (nan, 0.0))
 ('invgamma', (2.0668996136993067,), (1.0, nan, 0.0))
 ('invweibull', (10.58,), (1.0, nan, 0.0))
 ('ksone', (1000,), (1.0, nan, nan))
 ('levy', (), (nan, 0.0))
 ('levy_l', (), (nan, 0.0))
 ('loglaplace', (3.2505926592051435,), (1.0, nan, 0.0))
 ('lomax', (1.8771398388773268,), (1.0, nan, 0.0))
 ('mielke', (10.4, 3.6000000000000001), (1.0, 1.0, nan, 0.0))
 ('pareto', (2.621716532144454,), (1.0, nan, 0.0))
 ('reciprocal', (0.0062309367010521255, 1.0062309367010522), (1.0, 1.0,
 nan, nan))
 ('truncnorm', (-1.0978730080013919, 2.7306754109031979), (1.0, 1.0, nan,
 nan))
 }}}

-- 
Ticket URL: <http://projects.scipy.org/scipy/ticket/1359>
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