Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/7694#discussion_r35927837
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala ---
@@ -620,29 +622,24 @@ private[ml] object RandomForest extends Logging {
}
}
- /**
- * Calculate the information gain for a given (feature, split) based
upon left/right aggregates.
- * @param leftImpurityCalculator left node aggregates for this (feature,
split)
- * @param rightImpurityCalculator right node aggregate for this
(feature, split)
- * @return information gain and statistics for split
- */
- private def calculateGainForSplit(
+ private def calculateImpurityStats(
--- End diff --
Please update the documentation, rather than removing it.
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