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https://issues.apache.org/jira/browse/HIVE-9557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14599021#comment-14599021
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Bruno P. Kinoshita commented on HIVE-9557:
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Nishant, take a look at
[Resources for
Contributors|https://cwiki.apache.org/confluence/display/Hive/Home#Home-ResourcesforContributors]
and
[How to
Contribute|https://cwiki.apache.org/confluence/display/Hive/HowToContribute]
Looking forward to being able to use cos similarity in Hive :-)
Cheers
Bruno
> create UDF to measure strings similarity using Cosine Similarity algo
> ---------------------------------------------------------------------
>
> Key: HIVE-9557
> URL: https://issues.apache.org/jira/browse/HIVE-9557
> Project: Hive
> Issue Type: Improvement
> Components: UDF
> Reporter: Alexander Pivovarov
> Assignee: Alexander Pivovarov
>
> algo description http://en.wikipedia.org/wiki/Cosine_similarity
> {code}
> --one word different, total 2 words
> str_sim_cosine('Test String1', 'Test String2') = (2 - 1) / 2 = 0.5f
> {code}
> reference implementation:
> https://github.com/Simmetrics/simmetrics/blob/master/src/uk/ac/shef/wit/simmetrics/similaritymetrics/CosineSimilarity.java
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