GitHub user felixcheung opened a pull request:
https://github.com/apache/spark/pull/9536
[SPARK-11567][PYTHON] Add Python API for corr in group
like `df.agg(corr("col1", "col2")`
@davies
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/felixcheung/spark pyfunc
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/9536.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 #9536
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commit 49773f3aa812c70049c66b3de48fc188be6d10be
Author: felixcheung <felixcheun...@hotmail.com>
Date: 2015-11-07T07:43:31Z
Add corr that can be used in agg
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