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https://issues.apache.org/jira/browse/MAHOUT-42?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12590599#action_12590599
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Karl Wettin commented on MAHOUT-42:
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{quote}
This is probably not what you had in mind.
This is the kind of bug you would expect to show up if we have
vector0=sparsevector{1,0,2} and vector1=sparsevector{3,3,2}
You probably expect a2=5 and b2=20, but you will get a2=14, b2=11
{quote}
Ahh, right. Thanks!
The new patch should fix that.
> Tanimoto coefficient distance measure
> -------------------------------------
>
> Key: MAHOUT-42
> URL: https://issues.apache.org/jira/browse/MAHOUT-42
> Project: Mahout
> Issue Type: New Feature
> Reporter: Karl Wettin
> Assignee: Karl Wettin
> Attachments: MAHOUT-42.txt, MAHOUT-42.txt
>
>
> http://en.wikipedia.org/wiki/Jaccard_index
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