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https://issues.apache.org/jira/browse/PIG-277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12607282#action_12607282
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Olga Natkovich commented on PIG-277:
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Couple of additional comments:
- Some of the functions throw RuntimeExcepion. As the case with math functions,
we should only through IOExceptions.
- It would be nice to include in the comments the link to a page that defines
the functions
> UDF for computing correlation and covariance between data sets
> --------------------------------------------------------------
>
> Key: PIG-277
> URL: https://issues.apache.org/jira/browse/PIG-277
> Project: Pig
> Issue Type: New Feature
> Reporter: Ajay Garg
> Priority: Minor
> Attachments: stat.patch
>
>
> UDFs for computing correlation and covariance between data sets. Use
> following commands to compute covariance
> A = load 'input.xml' using PigStorage(':');
> B = group A all;
> define c COV('a','b','c');
> D = foreach B generate group,c(A.$0,A.$1,A.$2);
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