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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 36215] - [Math] HypergeometricDistributionImpl cumulativeProbability calculation overflown
Date Fri, 26 Aug 2005 13:25:49 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=36215





------- Additional Comments From brent@worden.org  2005-08-26 15:25 -------
(In reply to comment #15)

I have not had time to get the fix pushed to the trunk, soit will not be in the 
nightly builds yet.  I hope to get around to this today.

Both problems have been resolved.  The problem with returning 0 was caused by a 
simple erroneous boundry value check.  The poor accuracy for small cumulative 
probabilities was the result of a truncation error when performing 1.0 - 
verySmallProbability in certain circumstances.

Of note, the performance for these routines is quite poor for large population 
sizes.  I plan to address these limitations and improve performance post 
release 1.1.




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