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Posted to issues@lucene.apache.org by "Joel Bernstein (Jira)" <ji...@apache.org> on 2020/05/13 11:22:00 UTC

[jira] [Created] (SOLR-14478) Allow diff Stream Evaluator to operate on a matrix

Joel Bernstein created SOLR-14478:
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             Summary: Allow diff Stream Evaluator to operate on a matrix
                 Key: SOLR-14478
                 URL: https://issues.apache.org/jira/browse/SOLR-14478
             Project: Solr
          Issue Type: New Feature
      Security Level: Public (Default Security Level. Issues are Public)
          Components: streaming expressions
            Reporter: Joel Bernstein


Currently the *diff* function performs serial differencing on a numeric vector. This ticket will allow the diff function to perform serial differencing on all the rows of a *matrix*. This will make it easy to perform *correlations* on *differenced time series matrices* using math expressions.



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