Github user rotationsymmetry commented on a diff in the pull request: https://github.com/apache/spark/pull/8552#discussion_r38443083 --- Diff: mllib/src/main/scala/org/apache/spark/ml/param/shared/sharedParams.scala --- @@ -337,7 +337,7 @@ private[ml] trait HasStepSize extends Params { * Param for Step size to be used for each iteration of optimization.. * @group param */ - final val stepSize: DoubleParam = new DoubleParam(this, "stepSize", "Step size to be used for each iteration of optimization.") + final val stepSize: DoubleParam = new DoubleParam(this, "stepSize", "Step size to be used for each iteration of optimization.", ParamValidators.inRange(0, 1, lowerInclusive = false, upperInclusive = true)) --- End diff -- Do we want to enforce the stepsize <= 1?
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