Aleksei Dievskii created MATH-1136:
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Summary: BinomialDistribution deals with degenerate cases
incorrectly
Key: MATH-1136
URL: https://issues.apache.org/jira/browse/MATH-1136
Project: Commons Math
Issue Type: Bug
Affects Versions: 3.3
Reporter: Aleksei Dievskii
Priority: Minor
Attachments: BINOMIAL_DEGENERATE.patch
The following calculation returns false results:
{{
new BinomialDistribution(0, 0.01).logProbability(0)
}}
It evaluates to Double.NaN when it should be 0 (cf., for example, "dbinom(0, 0,
0.01, log=T)" in R).
I will attach a patch dealing with the problem shortly.
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