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From "Gilles (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MATH-747) Several Constructors for PoissonDistributionImpl are broken
Date Sat, 18 Feb 2012 20:49:59 GMT

    [ https://issues.apache.org/jira/browse/MATH-747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13211070#comment-13211070
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Gilles commented on MATH-747:
-----------------------------

You are right.
I suggest that you try the snapshot of the upcoming version 3.0 (there won't be a 2.2.1 release).

                
> Several Constructors for PoissonDistributionImpl are broken
> -----------------------------------------------------------
>
>                 Key: MATH-747
>                 URL: https://issues.apache.org/jira/browse/MATH-747
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 2.2
>            Reporter: Steve Appling
>            Priority: Critical
>             Fix For: 2.2.1
>
>
> Only the constructor PoissonDistributionImpl(double) seems to actually work.  All of
the others cause a NullPointerException.  The working one creates a default NormalDistribution,
but all of the others just leave the member "normal" set to null and cause an NPE in the constructor.
 
> I can't even find a work around to construct a PoissonDistributionImpl with both a specified
mean and an epsilon, since there is no way to set epsilon after creation and the constructor
PoissonDistributionImpl(double p, double epsilon) does not work.

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