[Scipy-tickets] [SciPy] #1614: logcdf function of normal distribution (scipy.stats) can not handle a wide enough range of values

SciPy Trac scipy-tickets@scipy....
Mon Apr 2 13:58:40 CDT 2012


#1614: logcdf function of normal distribution (scipy.stats) can not handle a wide
enough range of values
-------------------------------------+--------------------------------------
 Reporter:  andrewschein             |       Owner:  somebody  
     Type:  defect                   |      Status:  needs_work
 Priority:  normal                   |   Milestone:  0.11.0    
Component:  scipy.stats              |     Version:  devel     
 Keywords:  normal distribution cdf  |  
-------------------------------------+--------------------------------------

Comment(by andrewschein):

 I see the mistake in my notes now.  I'll try to work on adding the
 additional portions of the approximation in the next week or so.

 Ralf - in answer to your question, there is no particular reason to use
 the number 10 (or any other number) provided it is close to the cliff.  I
 assume the existing code loses precision near the end of its range, but
 don't have any data to back that up.

-- 
Ticket URL: <http://projects.scipy.org/scipy/ticket/1614#comment:17>
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