GitHub user smurching reopened a pull request:
https://github.com/apache/spark/pull/14872
[SPARK-3162][MLlib][WIP] Add local tree training for decision tree
regressors
## What changes were proposed in this pull request?
Based on [Yggdrasil](https://github.com/fabuzaid21/yggdrasil), added local
training of decision tree regressors.
Some classes/objects largely correspond to Yggdrasil classes/objects.
Specifically:
* class LocalDecisionTreeRegressor --> class YggdrasilRegressor
* object LocalDecisionTree --> object YggdrasilRegression
* object LocalDecisionTreeUtils --> object Yggdrasil
## How was this patch tested?
Added unit tests in (ml/tree/impl/LocalTreeTrainingSuite.scala) verifying
that local & distributed training of a decision tree regressor produces the
same tree.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/smurching/spark local-trees-pr
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14872.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 #14872
----
commit acf5b3e29a346a0cb86f621269855a6a98a9a74e
Author: Siddharth Murching <[email protected]>
Date: 2016-08-29T23:51:33Z
Add local tree training for decision tree regressors
commit aa4fcc8d401385f38fe0cdfdb9fe39062c3a9f96
Author: Siddharth Murching <[email protected]>
Date: 2016-08-30T01:19:07Z
Fix setting of impurity values for leaf nodes to match values produced by
distributed Random Forest algorithm
commit f273fc6a4b5048ae577d03676def354dce5c87a7
Author: Siddharth Murching <[email protected]>
Date: 2016-08-31T07:01:26Z
WIP refactoring single-machine tree code
commit 5e61e3b29c236d27e0d655d15a48f2fe3e13d26a
Author: Siddharth Murching <[email protected]>
Date: 2016-09-01T01:22:48Z
Remove unused imports, remove array of single-node impurity aggregators
commit d2060fc460a97228a36bf81956cf8dd24c83106e
Author: Siddharth Murching <[email protected]>
Date: 2016-09-01T23:11:17Z
WIP
commit 634a3223374608d68018daac5500a429034bbc20
Author: Siddharth Murching <[email protected]>
Date: 2016-09-02T00:21:10Z
More work, tests still pass
commit eb7fde00e0db5aa5d04951f8f4a9cd62204f1609
Author: Siddharth Murching <[email protected]>
Date: 2016-09-02T17:02:06Z
WIP: Added tests for classes upon which local tree training is dependent.
Some integration tests fail
commit b748f05e3eaa7d58b1ad86d269e0dda5f35ee885
Author: Siddharth Murching <[email protected]>
Date: 2016-09-02T17:37:31Z
WIP debugging
commit 297052242727e6693ccbacf89f44b3ff6db584f7
Author: Siddharth Murching <[email protected]>
Date: 2016-09-02T21:34:13Z
Consolidate checking for valid splits
commit 8d443ce38f958e7b83b502e614e01c824cb63c4b
Author: Siddharth Murching <[email protected]>
Date: 2016-09-02T21:52:47Z
Delete empty test suite
commit ee56ffe98756ed78cefbc3f782a471f04e80b256
Author: Siddharth Murching <[email protected]>
Date: 2016-09-02T22:49:38Z
Fix some style errors
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