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From "Vasil Vasilev (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAHOUT-684) Topics regularization for LDA
Date Thu, 28 Apr 2011 14:07:03 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13026315#comment-13026315
] 

Vasil Vasilev commented on MAHOUT-684:
--------------------------------------

This patch contains also the changes from MAHOUT-683, because MAHOUT-684 depends on MAHOUT-683.
As soon as MAHOUT-683 is checked in another patch can be done.

> Topics regularization for LDA
> -----------------------------
>
>                 Key: MAHOUT-684
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-684
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Clustering
>            Reporter: Vasil Vasilev
>            Priority: Minor
>              Labels: LDA.
>         Attachments: MAHOUT-684.patch
>
>
> Implementation provided for the alpha parameters estimation as described in the paper
of Blei, Ng and Jordan (http://www.cs.princeton.edu/~blei/papers/BleiNgJordan2003.pdf).
> Remark: there is a mistake in the last formula in A.4.2 (the signs are wrong). The correct
version is described here: http://www.cs.cmu.edu/~jch1/research/dirichlet/dirichlet.pdf (page
6).

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