huaxingao opened a new pull request #27895: [SPARK-31138][ML] Add ANOVA Selector for continuous features and categorical labels URL: https://github.com/apache/spark/pull/27895 ### What changes were proposed in this pull request? Add ANOVA Selector ### Why are the changes needed? Currently Spark only supports selection of categorical features, while there are many requirements for the selection of continuous distribution features. https://github.com/apache/spark/pull/27679 added FValueSelector for continuous features and continuous labels. This PR adds ANOVASelector for continuous features and categorical labels. ### Does this PR introduce any user-facing change? Yes, add a new Selector. ### How was this patch tested? add new test suites
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