[GitHub] [spark] viirya commented on a change in pull request #27785: [SPARK-30934][ML][DOCS] Update ml-guide and ml-migration-guide for 3.0 release

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viirya commented on a change in pull request #27785: [SPARK-30934][ML][DOCS] Update ml-guide and ml-migration-guide for 3.0 release
URL: https://github.com/apache/spark/pull/27785#discussion_r388035757
 
 

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 File path: docs/ml-migration-guide.md
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 @@ -33,16 +33,65 @@ Please refer [Migration Guide: SQL, Datasets and DataFrame](sql-migration-guide.
 
 * `OneHotEncoder` which is deprecated in 2.3, is removed in 3.0 and `OneHotEncoderEstimator` is now renamed to `OneHotEncoder`.
 * `org.apache.spark.ml.image.ImageSchema.readImages` which is deprecated in 2.3, is removed in 3.0, use `spark.read.format('image')` instead.
+* `org.apache.spark.mllib.clustering.KMeans.train` with param Int `runs` which is deprecated in 2.1, is removed in 3.0, use `train` method without `runs` instead.
+* `org.apache.spark.mllib.classification.LogisticRegressionWithSGD` which is deprecated in 2.0, is removed in 3.0, use `org.apache.spark.ml.classification.LogisticRegression` or `spark.mllib.classification.LogisticRegressionWithLBFGS` instead.
+* `org.apache.spark.mllib.feature.ChiSqSelectorModel.isSorted ` which is deprecated in 2.1, is removed in 3.0, is not intended for subclasses to use.
+* `org.apache.spark.mllib.regression.RidgeRegressionWithSGD` which is deprecated in 2.0, is removed in 3.0, use `org.apache.spark.ml.regression.LinearRegression` with `elasticNetParam` = 0.0. Note the default `regParam` is 0.01 for `RidgeRegressionWithSGD`, but is 0.0 for `LinearRegression`.
+* `org.apache.spark.mllib.regression.LassoWithSGD` which is deprecated in 2.0, is removed in 3.0, use `org.apache.spark.ml.regression.LinearRegression` with `elasticNetParam` = 1.0. Note the default `regParam` is 0.01 for `LassoWithSGD`, but is 0.0 for `LinearRegression`.
+* `org.apache.spark.mllib.regression.LinearRegressionWithSGD` which is deprecated in 2.0, is removed in 3.0, use `org.apache.spark.ml.regression.LinearRegression` or `LBFGS` instead.
+* `org.apache.spark.mllib.clustering.KMeans.getRuns` and `setRuns` which are deprecated in 2.1, is removed in 3.0, have no effect since Spark 2.0.0.
+* `org.apache.spark.ml.LinearSVCModel.setWeightCol` which is deprecated in 2.4, is removed in 3.0, is not intended for users.
+* From 3.0, `org.apache.spark.ml.classification.MultilayerPerceptronClassificationModel` extends `MultilayerPerceptronParams` to expose the training params. As a result, layers in `MultilayerPerceptronClassificationModel` has been changed from Array[Int] to IntArrayParam. Users should use `MultilayerPerceptronClassificationModel.getLayers` instead of `MultilayerPerceptronClassificationModel.layers` to retrieve the size of layers.
 
 Review comment:
   `layers` in `MultilayerPerceptronClassificationModel` has been changed from `Array[Int]` to `IntArrayParam`?

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