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Posted to dev@lucene.apache.org by "Joel Bernstein (JIRA)" <ji...@apache.org> on 2017/05/13 23:53:04 UTC

[jira] [Created] (SOLR-10684) Add finddelay Stream Evaluator

Joel Bernstein created SOLR-10684:
-------------------------------------

             Summary: Add finddelay Stream Evaluator
                 Key: SOLR-10684
                 URL: https://issues.apache.org/jira/browse/SOLR-10684
             Project: Solr
          Issue Type: New Feature
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Joel Bernstein


The *finddelay* Stream Evaluator finds the delay/lag between two time series. Under the covers the convolution function will perform the math to find the delay.

Syntax:

{code}
delay = finddelay(colA, colb)
{code}

The convolution implementation is provided by Apache Commons Math.



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