Github user sethah commented on a diff in the pull request:
https://github.com/apache/spark/pull/9008#discussion_r53089894
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala ---
@@ -1171,4 +1173,28 @@ private[ml] object RandomForest extends Logging {
}
}
+ /**
+ * Inject the sample weight to sub-sample weights of the baggedPoints
+ */
+ private[impl] def reweightSubSampleWeights(
+ baggedTreePoints: RDD[BaggedPoint[TreePoint]]):
RDD[BaggedPoint[TreePoint]] = {
+ baggedTreePoints.map {bagged =>
+ val treePoint = bagged.datum
+ val adjustedSubSampleWeights = bagged.subsampleWeights.map(w => w *
treePoint.weight)
+ new BaggedPoint[TreePoint](treePoint, adjustedSubSampleWeights)
+ }
+ }
+
+ /**
+ * A thin adaptor to
[[org.apache.spark.mllib.tree.impl.DecisionTreeMetadata.buildMetadata]]
--- End diff --
nit: "adaptor" -> "adapter". I'm not sure it is currently _incorrect_ but
"adapter" is the significantly more common spelling.
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