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From "Alexander Pivovarov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9557) create UDF to measure strings similarity using Cosine Similarity algo
Date Sat, 27 Jun 2015 19:52:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14604327#comment-14604327
] 

Alexander Pivovarov commented on HIVE-9557:
-------------------------------------------

Hi Nishant, if I click on RB link I get this
{code}
You don't have access to this review request.

This review request is private. You must be a requested reviewer, either directly or on a
requested group, and have permission to access the repository in order to view this review
request.
{code}

I recommend to use RBTTools to upload and update patches.
for initial upload
{code}
rbt post -g yes
{code}
to update
{code}
rbt post -u -g yes 
{code}
https://www.reviewboard.org/downloads/rbtools/


> 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: Nishant Kelkar
>              Labels: CosineSimilarity, SimilarityMetric, UDF
>         Attachments: HIVE-9557.1.patch, udf_cosine_similarity-v01.patch
>
>
> 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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