Github user mpjlu commented on a diff in the pull request:
https://github.com/apache/spark/pull/15647#discussion_r85311930
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala ---
@@ -171,18 +171,19 @@ object ChiSqSelectorModel extends
Loader[ChiSqSelectorModel] {
/**
* Creates a ChiSquared feature selector.
- * The selector supports three selection methods: `kbest`, `percentile`
and `fpr`.
- * `kbest` chooses the `k` top features according to a chi-squared test.
- * `percentile` is similar but chooses a fraction of all features instead
of a fixed number.
- * `fpr` chooses all features whose false positive rate meets some
threshold.
- * By default, the selection method is `kbest`, the default number of top
features is 50.
+ * The selector supports different selection methods: `numTopFeatures`,
`percentile`, `fpr`.
+ * - `numTopFeatures` chooses the `k` top features according to a
chi-squared test.
--- End diff --
ditto
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