huaxingao commented on a change in pull request #27895: [SPARK-31138][ML] Add
ANOVA Selector for continuous features and categorical labels
URL: https://github.com/apache/spark/pull/27895#discussion_r392717974
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File path: mllib/src/main/scala/org/apache/spark/ml/stat/FValueTest.scala
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@@ -44,7 +44,7 @@ object FValueTest {
* @return DataFrame containing the test result for every feature against
the label.
* This DataFrame will contain a single Row with the following
fields:
* - `pValues: Vector`
- * - `degreesOfFreedom: Array[Int]`
+ * - `degreesOfFreedom: Array[Long]`
Review comment:
DoF = ```numSamples - 2```, so it could be very large.
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