Github user yanboliang commented on a diff in the pull request:
https://github.com/apache/spark/pull/13129#discussion_r63475090
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala ---
@@ -252,7 +250,7 @@ class LinearRegression @Since("1.3.0") (@Since("1.3.0")
override val uid: String
model,
Array(0D),
Array(0D))
- return copyValues(model.setSummary(trainingSummary))
+ return model.setSummary(trainingSummary)
--- End diff --
@MLnick I added test case for this scenario and updated other test cases to
ensure coping prediction column(and other params) correct in all situations.
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