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From "Thomas Neidhart (JIRA)" <>
Subject [jira] [Updated] (MATH-968) Pareto distribution is missing
Date Thu, 25 Apr 2013 06:40:21 GMT


Thomas Neidhart updated MATH-968:


Please find attached a patch that add support for the Pareto distribution.

The test values have been created with R (cran modules VGAM contains a pareto distribution),
although there seems to be a small bug in the module as the density for x == scale/k is returned
as 0.

Looking at the wikipedia page or wolfram (
you can see that for this case the density should be <> 0. So I adapted the test values
for this case.
> Pareto distribution is missing
> ------------------------------
>                 Key: MATH-968
>                 URL:
>             Project: Commons Math
>          Issue Type: New Feature
>    Affects Versions: 3.2
>            Reporter: Alex Gryzlov
>            Priority: Minor
>         Attachments:
> Seems that org.apache.commons.math3.distribution lacks a ParetoDistribution for some
reason. This is a real common type of distribution, so providing it would be very nice!

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