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https://issues.apache.org/jira/browse/MATH-1373?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Karl D. Gierach updated MATH-1373:
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Attachment: MATH-1373.patch
this patch includes a revision to unit test which calcuates all expected shape
and scale parameters based on the mean and variance of the unscaled data.
> In LogNormalDistribution.java, it appears shape & scale are
> reversed/mis-labelled.
> ----------------------------------------------------------------------------------
>
> Key: MATH-1373
> URL: https://issues.apache.org/jira/browse/MATH-1373
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.6.1
> Reporter: Karl D. Gierach
> Priority: Minor
> Attachments: MATH-1373.patch
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> When I compute the logshape and log scale based on the formulas on
> wikipedia's lognormal distribution page that use empirical mean and variance,
> I found that the getNumericalMean() method was not returning the empirical
> mean.
> However, upon just trying to reverse the shape and scale parameters in the
> constructor proved to fix the problem, and the object then returns the
> correct empirical mean.
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