Github user MLnick commented on a diff in the pull request:
https://github.com/apache/spark/pull/17169#discussion_r104385944
--- Diff: mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala
---
@@ -78,16 +78,19 @@ final class Bucketizer @Since("1.4.0") (@Since("1.4.0")
override val uid: String
def setOutputCol(value: String): this.type = set(outputCol, value)
/**
- * Param for how to handle invalid entries. Options are 'skip' (filter
out rows with
- * invalid values), 'error' (throw an error), or 'keep' (keep invalid
values in a special
- * additional bucket).
+ * Param for how to handle invalid entries containing either NaN or null
values.
--- End diff --
This is actually not true currently - `null` is not handled as an invalid
value - see https://issues.apache.org/jira/browse/SPARK-19781
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