GitHub user mengxr reopened a pull request:

    https://github.com/apache/spark/pull/4228

    [SPARK-5430] move treeReduce and treeAggregate from mllib to core

    We have seen many use cases of `treeAggregate`/`treeReduce` outside the ML 
domain. Maybe it is time to move them to Core. @pwendell


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/mengxr/spark SPARK-5430

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/spark/pull/4228.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 #4228
    
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commit d600b6cd7d80bfc31878cf1dec2a706b7256474a
Author: Xiangrui Meng <[email protected]>
Date:   2015-01-27T19:06:07Z

    move treeReduce and treeAggregate to core

commit 6f948c5ff22e3ee52d0f56b5723338e556945382
Author: Xiangrui Meng <[email protected]>
Date:   2015-01-27T20:03:28Z

    add treeReduce/treeAggregate to JavaRDDLike

commit 3ae1a4b4c7a6ec7cbd77736698a2d037eb6c9663
Author: Xiangrui Meng <[email protected]>
Date:   2015-01-27T20:52:06Z

    add treeReduce/treeAggregate to Python

commit e89a43ed8dff3a029bb94c27370417fcc5843330
Author: Xiangrui Meng <[email protected]>
Date:   2015-01-27T21:11:23Z

    fix compile and update java doc

commit 20ad40de349769ce4cb0dd793d0013ee1c63a367
Author: Xiangrui Meng <[email protected]>
Date:   2015-01-27T23:30:55Z

    exclude tree* from mima

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