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https://issues.apache.org/jira/browse/SOLR-10724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Bernstein resolved SOLR-10724.
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Resolution: Resolved
> Add describe Stream Evaluator
> -----------------------------
>
> Key: SOLR-10724
> URL: https://issues.apache.org/jira/browse/SOLR-10724
> Project: Solr
> Issue Type: New Feature
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Joel Bernstein
> Assignee: Joel Bernstein
> Fix For: master (7.0), 6.7
>
> Attachments: SOLR-10724.patch
>
>
> The *describe* Stream Evaluator provides descriptive statistics for an array
> of numbers. describe returns a single tuple with the following stats:
> geometricMean, kurtosis, max, min, mean, N, populationVariance,
> quadraticMean, skewness, standardDeviation, sum, sumsq, variance
> Syntax:
> {code}
> c = describe(colA)
> {code}
> Implementation provided by Apache Commons Math
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