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https://issues.apache.org/jira/browse/MATH-511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12994577#comment-12994577
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Gilles commented on MATH-511:
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I've implemented the "derivative" method in revision 1070698.
Please check it; there is an issue with NaN being generated but I'm not sure
that the implemented fix is enough or all right in all cases.
> Class "Gaussian" can implement the "DifferentiableUnivariateRealFunction"
> interface
> -----------------------------------------------------------------------------------
>
> Key: MATH-511
> URL: https://issues.apache.org/jira/browse/MATH-511
> Project: Commons Math
> Issue Type: Improvement
> Reporter: Gilles
> Assignee: Gilles
> Priority: Minor
>
> The class "Gaussian" should implement the
> "DifferentiableUnivariateRealFunction" interface, not just
> "UnivariateRealFunction" (as it does now).
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