[Scipy-tickets] [SciPy] #823: betainc function in scipy.special

SciPy scipy-tickets@scipy....
Mon Dec 22 07:52:07 CST 2008


#823: betainc function in scipy.special
---------------------------+------------------------------------------------
 Reporter:  EndaKelly      |       Owner:  somebody
     Type:  defect         |      Status:  new     
 Priority:  normal         |   Milestone:          
Component:  scipy.special  |     Version:          
 Severity:  normal         |    Keywords:  betainc 
---------------------------+------------------------------------------------
 The betainc function in scipy is not the incomplete beta function, but the
 regularised incomplete beta function, and is identical to the cdf of the
 beta distribution, which is already implemented in scipy by btdtr. To get
 the incomplete beta function from betainc you need to multiply it by the
 beta function itself. The "help" documentation is correct for the
 regularised incomplete beta function.

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Ticket URL: <http://scipy.org/scipy/scipy/ticket/823>
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