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From "Sean Owen (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAHOUT-603) Standardize implementation of log-likelihood
Date Mon, 31 Jan 2011 07:40:11 GMT

     [ https://issues.apache.org/jira/browse/MAHOUT-603?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sean Owen updated MAHOUT-603:
-----------------------------

    Status: Patch Available  (was: Open)

This patch does the trick, and has some small code formatting / style changes

> Standardize implementation of log-likelihood
> --------------------------------------------
>
>                 Key: MAHOUT-603
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-603
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Collaborative Filtering
>    Affects Versions: 0.4, 0.3
>            Reporter: Sean Owen
>            Assignee: Sean Owen
>            Priority: Minor
>              Labels: collaborative-filtering, log-likelihood, similarity
>             Fix For: 0.5
>
>         Attachments: MAHOUT-603.patch
>
>
> We should use Ted's formulation of log-likelihood instead of the one that exists twice
in the CF module. It doesn't change the resulting numbers, though does fix some symmetry issues
in corner cases.

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