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https://issues.apache.org/jira/browse/MATH-184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phil Steitz resolved MATH-184.
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Resolution: Fixed
Fixed in r 620368.
Thanks for reporting this.
> cumulativeProbability((double)n, (double)n) returns 0 for integer
> distributions
> -------------------------------------------------------------------------------
>
> Key: MATH-184
> URL: https://issues.apache.org/jira/browse/MATH-184
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 1.1, 1.2
> Reporter: Yegor Bryukhov
> Priority: Minor
> Fix For: 1.2
>
>
> cumulativeProbability((double)n, (double)n) returns 0 for
> discrete/integer distributions
> I suppose AbstractIntegerDistribution.cumulativeProbability(double,
> double) should be overridden to call its (int, int) version instead of
> using default one from AbstractDistribution
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