huaxingao opened a new pull request #27322: [SPARK-26111][ML][WIP] Support F-value between label/feature for continuous distribution feature selection URL: https://github.com/apache/spark/pull/27322 ### What changes were proposed in this pull request? Add FValue selection for continuous distribution features. ### Why are the changes needed? Current Spark only supports the selection of categorical features, while there are many requirements for the selection of continuous distribution features. ANOVA F-value is one way to select features from the continuous distribution and it's important to support it in spark. ### Does this PR introduce any user-facing change? Yes ### How was this patch tested? Add unit tests
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