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https://issues.apache.org/jira/browse/SOLR-12647?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Bernstein updated SOLR-12647:
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Summary: Add meanSq Stream Evaluator to calculate the mean of squares of a
vector (was: Add meanSq to calculate the mean of squares of a vector)
> Add meanSq Stream Evaluator to calculate the mean of squares of a vector
> ------------------------------------------------------------------------
>
> Key: SOLR-12647
> URL: https://issues.apache.org/jira/browse/SOLR-12647
> Project: Solr
> Issue Type: New Feature
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Joel Bernstein
> Priority: Major
>
> This ticket adds the *meanSq* Stream Evaluator which calculates the mean of
> the squares of vector. This is often used to calculate the mean square error
> of a regression model
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