Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/14747#discussion_r75636483
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala ---
@@ -114,7 +114,7 @@ final class QuantileDiscretizer @Since("1.6.0")
(@Since("1.6.0") override val ui
splits(0) = Double.NegativeInfinity
splits(splits.length - 1) = Double.PositiveInfinity
- val bucketizer = new Bucketizer(uid).setSplits(splits)
+ val bucketizer = new Bucketizer(uid).setSplits(splits.distinct.sorted)
--- End diff --
I think that's reasonable, to warn in this case. It shouldn't be too noisy
because this case is rare.
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