Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/8554#discussion_r38590092
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/evaluation/RegressionEvaluator.scala
---
@@ -29,10 +29,12 @@ import org.apache.spark.sql.types.DoubleType
* :: Experimental ::
* Evaluator for regression, which expects two input columns: prediction
and label.
*/
+@Since("1.5.0")
@Experimental
final class RegressionEvaluator(override val uid: String)
--- End diff --
ditto
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