[jira] [Created] (FLINK-2144) Implement count, average, and variance for windows

[Gabor Gevay (JIRA)]

Gabor Gevay created FLINK-2144:
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             Summary: Implement count, average, and variance for windows
                 Key: FLINK-2144
                 URL: https://issues.apache.org/jira/browse/FLINK-2144
             Project: Flink
          Issue Type: Sub-task
            Reporter: Gabor Gevay
            Assignee: Gabor Gevay
            Priority: Minor


By count I mean the number of elements in the window.

These can be implemented very efficiently building on FLINK-2143.



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