Seth Hendrickson created SPARK-12381:
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Summary: Move decision tree helper classes from spark.mllib to
spark.ml
Key: SPARK-12381
URL: https://issues.apache.org/jira/browse/SPARK-12381
Project: Spark
Issue Type: Sub-task
Components: ML, MLlib
Reporter: Seth Hendrickson
The helper classes for decision trees and decision tree ensembles (e.g.
Impurity, InformationGainStats, ImpurityStats, DTStatsAggregator, etc...)
currently reside in spark.mllib, but as the algorithm implementations are moved
to spark.ml, so should these helper classes.
We should take this opportunity to make some of those helper classes private
when possible (especially if they are only needed during training) and maybe
change the APIs (especially if we can eliminate duplicate data stored in the
final model).
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