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From "Gilles (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MATH-815) Multivariate Normal Distribution
Date Tue, 31 Jul 2012 10:14:34 GMT

    [ https://issues.apache.org/jira/browse/MATH-815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13425652#comment-13425652
] 

Gilles commented on MATH-815:
-----------------------------

bq. It may not be.

Then it is better not to include them until there is an identified need.
The rationale is that it is easy to add methods later, while removing or changing them in
any ways is not (due to the backwards-compatibility constraint).

                
> Multivariate Normal Distribution
> --------------------------------
>
>                 Key: MATH-815
>                 URL: https://issues.apache.org/jira/browse/MATH-815
>             Project: Commons Math
>          Issue Type: New Feature
>            Reporter: Jared Becksfort
>            Priority: Minor
>         Attachments: MultivariateNormalDistribution.java, MultivariateNormalDistributionTest.java,
mvn.tgz, mvn2.tgz, mvn3.zip, patch
>
>   Original Estimate: 1m
>  Remaining Estimate: 1m
>
> I will submit a class for Multivariate Normal Distributions.  Not sure if it will allow
sampling initially.
> > Hello,
> >
> > I have implemented some classes for multivariate Normal distributions, multivariate
normal mixture models, and an expectation maximization fitting class for the mixture model.
 I would like to submit it to Apache Commons Math.  I still have some touching up to do so
that they fit the style guidelines and implement the correct interfaces.  Before I do so,
I thought I would at least ask if the developers of the project are interested in me submitting
them.
> >
> > Thanks,
> > Jared Becksfort
> Dear Jared,
> Yes, that would be very nice to have such an addition! Remember to also include unit
tests (refer to the current ones for examples). The best would be to split a submission up
into multiple minor ones, each covering a natural submission (e.g. multivariate Normal distribution
in one submission), and create an issue as described at http://commons.apache.org/math/issue-tracking.html
.
> If you run into any problems, please do not hesitate to ask on this mailing list.
> Cheers, Mikkel.

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