spark Impurities 源码

2022-10-20
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spark Impurities 代码

文件路径：/mllib/src/main/scala/org/apache/spark/mllib/tree/impurity/Impurities.scala

/*
 * 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.mllib.tree.impurity

/**
 * Factory for Impurity instances.
 */
private[mllib] object Impurities {

  def fromString(name: String): Impurity = name match {
    case "gini" => Gini
    case "entropy" => Entropy
    case "variance" => Variance
    case _ => throw new IllegalArgumentException(s"Did not recognize Impurity name: $name")
  }

}

相关信息

spark 源码目录

相关文章

spark Entropy 源码

spark Gini 源码

spark Impurity 源码

spark Variance 源码

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