[Scipy-tickets] [SciPy] #1882: Computing variance of non-central t-distribution gives error

SciPy Trac scipy-tickets@scipy....
Fri Mar 29 10:59:38 CDT 2013


#1882: Computing variance of non-central t-distribution gives error
--------------------+-------------------------------------------------------
 Reporter:  Sytse   |       Owner:  somebody   
     Type:  defect  |      Status:  new        
 Priority:  normal  |   Milestone:  Unscheduled
Component:  Other   |     Version:  0.11.0     
 Keywords:          |  
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Comment(by josefpktd):

 Sytse: just a warning

 some of the .stats methods have still mistakes in them, and some exotic
 distributions may return wrong numbers (mainly for skew and kurtosis)

 Also, infinite or non-existing moments are not correctly specified (as inf
 or nan) in all cases.

 I don't know much about the moments of nct, but I get this

 {{{
 >>> stats.nct.stats(1,1, moments='mv')
 (array(7.1717579868397251e+307), array(-inf))
 }}}

-- 
Ticket URL: <http://projects.scipy.org/scipy/ticket/1882#comment:2>
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