Github user feynmanliang commented on a diff in the pull request:
https://github.com/apache/spark/pull/7099#discussion_r34085528
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala ---
@@ -212,12 +230,139 @@ class LinearRegressionModel private[ml] (
extends RegressionModel[Vector, LinearRegressionModel]
with LinearRegressionParams {
+ @transient private var trainingSummary:
Option[LinearRegressionTrainingSummary] = None
--- End diff --
What about during model save/load? Users may want to see some training
stats such as r^2 and MSE after loading a model. If `trainingSummary` is
transient and the only place we put the small stats, we will need to think of
another way to support this use case.
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