GitHub user JihongMA opened a pull request:
https://github.com/apache/spark/pull/8778
SPARK-9296 (add variance support)
extending variance support which leverages stddev implementation.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/JihongMA/spark-1 SPARK-SQL
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/8778.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #8778
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commit 7eb239b677b9d345efd834004dd32fd291c929e4
Author: Jihong MA <[email protected]>
Date: 2015-09-16T06:54:32Z
add variance support
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