Github user tomerk commented on a diff in the pull request:
https://github.com/apache/spark/pull/3099#discussion_r20034471
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/example/StandardScaler.scala ---
@@ -0,0 +1,70 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.example
+
+import org.apache.spark.ml._
+import org.apache.spark.ml.param._
+import org.apache.spark.mllib.feature
+import org.apache.spark.mllib.linalg.Vector
+import org.apache.spark.sql.SchemaRDD
+import org.apache.spark.sql.catalyst.analysis.Star
+import org.apache.spark.sql.catalyst.dsl._
+import org.apache.spark.sql.catalyst.expressions.Row
+
+class StandardScaler extends Estimator[StandardScalerModel] with
HasInputCol {
+
+ def setInputCol(value: String): this.type = { set(inputCol, value); this
}
+
+ override val modelParams: StandardScalerModelParams = new
StandardScalerModelParams {}
+
+ override def fit(dataset: SchemaRDD, paramMap: ParamMap):
StandardScalerModel = {
+ import dataset.sqlContext._
+ val map = this.paramMap ++ paramMap
--- End diff --
This bit of boilerplate that appears in every transform and fit
implementation should probably be moved into the interface somehow
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