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https://issues.apache.org/jira/browse/MATH-817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13574052#comment-13574052
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Jared Becksfort commented on MATH-817:
--------------------------------------
{quote}
A typical example would be the number of components which the fitted mixture
should contain. Is it a parameter to be fixed at the fitter's construction?
{quote}
I think it will be best to supply data to the constructor and fitting
parameters to the fit method. This would allow one object to fit the same data
with different numbers of components or initial means. The data will be the
large part, so it is probably best to initialize it once and allow the user to
fit it multiple times with varying parameters without reconstructing an object.
That is how I will do it unless there is an objection.
> Multivariate Normal Mixture Model Fitting by Expectation Maximization
> ---------------------------------------------------------------------
>
> Key: MATH-817
> URL: https://issues.apache.org/jira/browse/MATH-817
> Project: Commons Math
> Issue Type: New Feature
> Reporter: Jared Becksfort
> Priority: Minor
> Attachments: AbstractMultivariateRealDistribution.java.patch,
> MixtureMultivariateRealDistribution.java.patch,
> MultivariateNormalDistribution.java.patch,
> MultivariateNormalMixtureExpectationMaximizationFitter.java,
> MultivariateNormalMixtureExpectationMaximizationFitterTest.java
>
> Original Estimate: 1m
> Remaining Estimate: 1m
>
> I will submit a class for fitting Multivariate Normal Mixture Models using
> Expectation Maximization.
> > 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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