Github user imatiach-msft commented on a diff in the pull request:
https://github.com/apache/spark/pull/16883#discussion_r104092772
--- Diff: docs/ml-features.md ---
@@ -576,7 +579,22 @@ will be generated:
2 | c | 1.0
~~~~
-Notice that the row containing "d" does not appear.
+Notice that the rows containing "d" or "e" do not appear.
+
+If you call `setHandleInvalid("keep")`, the following dataset
+will be generated:
+
+~~~~
+ id | category | categoryIndex
+----|----------|---------------
+ 0 | a | 0.0
+ 1 | b | 2.0
+ 2 | c | 1.0
+ 3 | d | 3.0
+ 4 | e | 3.0
+~~~~
+
+Notice that the rows containing "d" or "e" are mapped with indices "3.0"
--- End diff --
doc suggestion: rows containing "d" or "e" are mapped with indices "3.0"
=> rows containing "d" and "e" are mapped to index "3.0"
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