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Posted to issues@spark.apache.org by "Seth Hendrickson (JIRA)" <ji...@apache.org> on 2015/12/16 23:03:46 UTC

[jira] [Created] (SPARK-12381) Move decision tree helper classes from spark.mllib to spark.ml

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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