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https://issues.apache.org/jira/browse/MAHOUT-30?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jeff Eastman updated MAHOUT-30:
-------------------------------
Attachment: dirichlet-2.tar
- fixed bug in rBeta where arguments to rGamma were backwards
- fixed model std calculations to handle single sample case (s0=1 => std==0.0
which made resulting pdf==NaN and horked all subsequent cluster assignments)
- added cluster history display to examples with colors to illustrate cluster
convergence
This is behaving pretty nicely now
> dirichlet process implementation
> --------------------------------
>
> Key: MAHOUT-30
> URL: https://issues.apache.org/jira/browse/MAHOUT-30
> Project: Mahout
> Issue Type: New Feature
> Components: Clustering
> Reporter: Isabel Drost
> Assignee: Jeff Eastman
> Attachments: dirichlet-2.tar, dirichlet.tar, MAHOUT-30.patch,
> MAHOUT-30b.patch, MAHOUT-30c.patch, MAHOUT-30d.patch, MAHOUT-30e.patch
>
>
> Copied over from original issue:
> > Further extension can also be made by assuming an infinite mixture model.
> > The implementation is only slightly more difficult and the result is a
> > (nearly)
> > non-parametric clustering algorithm.
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