Github user chouqin commented on a diff in the pull request:
https://github.com/apache/spark/pull/2332#discussion_r17334865
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala
---
@@ -61,6 +68,8 @@ class Strategy (
val maxBins: Int = 32,
val quantileCalculationStrategy: QuantileStrategy = Sort,
val categoricalFeaturesInfo: Map[Int, Int] = Map[Int, Int](),
+ val minInstancesPerNode: Int = 0,
--- End diff --
1 seems more reasonable than 0, when a spit can't split a node apart(either
left or right child has 0 instances), this split should not be considered.
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