Github user yanboliang commented on a diff in the pull request:
https://github.com/apache/spark/pull/7694#discussion_r35959185
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala
---
@@ -117,14 +117,24 @@ final class DecisionTreeClassificationModel
private[ml] (
* Construct a decision tree classification model.
* @param rootNode Root node of tree, with other nodes attached.
*/
- def this(rootNode: Node) = this(Identifiable.randomUID("dtc"), rootNode)
+ def this(rootNode: Node, numClasses: Int) =
+ this(Identifiable.randomUID("dtc"), rootNode, numClasses)
override protected def predict(features: Vector): Double = {
- rootNode.predict(features)
+ rootNode.predictImpl(features).impurityStats.predict
+ }
+
+ override protected def predictRaw(features: Vector): Vector = {
+ Vectors.dense(rootNode.predictImpl(features).impurityStats.stats)
+ }
+
+ override protected def raw2probabilityInPlace(rawPrediction: Vector):
Vector = {
+ val sum = rawPrediction.toArray.sum
+ Vectors.dense(rawPrediction.toArray.map(_ / sum))
--- End diff --
done
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