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https://issues.apache.org/jira/browse/MATH-791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13282883#comment-13282883
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Sébastien Brisard commented on MATH-791:
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New accessors have been defined in {{r1342404}}.
> GammaDistribution.getAlpha() and getBeta() are confusing
> --------------------------------------------------------
>
> Key: MATH-791
> URL: https://issues.apache.org/jira/browse/MATH-791
> Project: Commons Math
> Issue Type: Improvement
> Affects Versions: 3.1, 4.0
> Reporter: Sébastien Brisard
> Assignee: Sébastien Brisard
> Priority: Minor
>
> As discussed on the mailing list
> {quote}
> Some methods in {{o.a.c.m3.distribution.GammaDistribution}} are ill-named.
> Indeed, the class javadoc explicitly refers to the Wikipedia page. In this
> page, the shape parameter is named alpha and the scale parameter is 1 / beta
> (inverse of beta), while in the current implementation, the shape parameter
> is named alpha, and the scale parameter is named beta (not 1 / beta !!!).
> This might be confusing. Looking at other web pages, I see there is
> apparently no consensus on the naming of shape and scale
> parameters. The problem lies with the accessors, which are
> {{double getAlpha()}}
> {{double getBeta()}}
> I think these accessors can lead to confusion. I would therefore propose to
> deprecate them, and replace them with
> {{double getShape()}}
> {{double getScale()}}
> {quote}
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