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From "Sean Owen (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAHOUT-902) TanimotoCoefficientSimilarity should return Double.NaN for two items that have zero overlap
Date Mon, 05 Dec 2011 17:56:40 GMT

     [ https://issues.apache.org/jira/browse/MAHOUT-902?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sean Owen updated MAHOUT-902:
-----------------------------

       Resolution: Fixed
    Fix Version/s: 0.6
         Assignee: Sean Owen
           Status: Resolved  (was: Patch Available)

Tests pass, and this looks like a good fix, and no controversy, and has a patch from the interested
party, so I just committed.
                
> TanimotoCoefficientSimilarity should return Double.NaN for two items that have zero overlap
> -------------------------------------------------------------------------------------------
>
>                 Key: MAHOUT-902
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-902
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Collaborative Filtering
>    Affects Versions: 0.6
>            Reporter: Sebastian Schelter
>            Assignee: Sean Owen
>              Labels: MAHOUT_INTRO_CONTRIBUTE
>             Fix For: 0.6
>
>         Attachments: MAHOUT-902.patch
>
>
> org.apache.mahout.cf.taste.impl.similarity.TanimotoCoefficientSimilarity should return
Double.NaN for two items that have zero overlap. Please also provide a unit-test for this.

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