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Posted to dev@mahout.apache.org by "Sean Owen (JIRA)" <ji...@apache.org> on 2011/02/03 13:52:29 UTC

[jira] Updated: (MAHOUT-603) Standardize implementation of log-likelihood

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

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

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

> 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: 0.3, 0.4
>            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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