Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/4906#discussion_r26539550
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/tree/model/treeEnsembleModels.scala
---
@@ -108,6 +110,58 @@ class GradientBoostedTreesModel(
}
override protected def formatVersion: String =
TreeEnsembleModel.SaveLoadV1_0.thisFormatVersion
+
+ /**
+ * Method to compute error or loss for every iteration of gradient
boosting.
+ * @param data RDD of [[org.apache.spark.mllib.regression.LabeledPoint]]
+ * @param loss evaluation metric.
+ * @return an array with index i having the losses or errors for the
ensemble
+ * containing trees 1 to i + 1
--- End diff --
Minor: Use 0-based indexing for doc: "containing trees 0 to i"
Or just say "containing the first i+1 trees"
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