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https://issues.apache.org/jira/browse/SOLR-11863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16575997#comment-16575997
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ASF subversion and git services commented on SOLR-11863:
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Commit cb1db482523cf33b7927b5155d506202d8ddbd89 in lucene-solr's branch 
refs/heads/jira/http2 from [~joel.bernstein]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=cb1db48 ]

SOLR-11863: Add knnRegress Stream Evaluator to support nearest neighbor 
regression


> Add knnRegress Stream Evaluator to support nearest neighbor regression
> ----------------------------------------------------------------------
>
>                 Key: SOLR-11863
>                 URL: https://issues.apache.org/jira/browse/SOLR-11863
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Joel Bernstein
>            Assignee: Joel Bernstein
>            Priority: Major
>             Fix For: master (8.0), 7.5
>
>         Attachments: SOLR-11863.patch, SOLR-11863.patch, SOLR-11863.patch
>
>
> This ticket adds the knnRegress Stream Evaluator to add support for nearest 
> neighbor regression to the Streaming Expressions machine learning library.
> Sample syntax:
> {code:java}
> let(sample=random(collection1, q=":", rows=10000, fl="response_d, filesize_d, 
> service_d"),
>     filesizes=col(sample, filesize_d),
>     responses=col(sample, response_d),
>     serviceLevels=col(sample, service_d),
>     observations=transpose(matrix(filesizes, responses)),
>     model=knnRegress(observations, serviceLevels, 10),
>     prediction=predict(model, array(36365, 645))){code}
>  



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