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https://issues.apache.org/jira/browse/MAHOUT-902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13163027#comment-13163027
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Hudson commented on MAHOUT-902:
-------------------------------
Integrated in Mahout-Quality #1226 (See
[https://builds.apache.org/job/Mahout-Quality/1226/])
MAHOUT-902 item similarity is now NaN for no overlap
srowen : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1210544
Files :
*
/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/similarity/TanimotoCoefficientSimilarity.java
*
/mahout/trunk/core/src/main/java/org/apache/mahout/math/hadoop/similarity/cooccurrence/measures/TanimotoCoefficientSimilarity.java
*
/mahout/trunk/core/src/test/java/org/apache/mahout/cf/taste/impl/similarity/TanimotoCoefficientSimilarityTest.java
> 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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