Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/10257#discussion_r47384289
--- Diff: docs/ml-features.md ---
@@ -459,6 +459,42 @@ column, we should get the following:
"a" gets index `0` because it is the most frequent, followed by "c" with
index `1` and "b" with
index `2`.
+Additionaly, there are two strategies regarding how `StringIndexer` will
handle
+unseen labels when you have set up a `StringIndexer` on a dataset which
you want
--- End diff --
"set up" --> "fit"
"on a dataset which you want to reuse on another" --> "on one dataset and
then use it to transform another dataset"
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