Github user dbtsai commented on a diff in the pull request:
https://github.com/apache/spark/pull/10702#discussion_r49399116
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala ---
@@ -219,33 +219,41 @@ class LinearRegression @Since("1.3.0")
(@Since("1.3.0") override val uid: String
}
val yMean = ySummarizer.mean(0)
- val yStd = math.sqrt(ySummarizer.variance(0))
+ var yStd = math.sqrt(ySummarizer.variance(0))
--- End diff --
Also, when `rawYStd == 0.0`, `standardization == true` and `regParam !=
0.0`, the problem will be ill-defined. We may want to throw an exception.
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