spark ElementwiseProductExample 源码

2022-10-20
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spark ElementwiseProductExample 代码

文件路径：/examples/src/main/scala/org/apache/spark/examples/mllib/ElementwiseProductExample.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.
 */

// scalastyle:off println
package org.apache.spark.examples.mllib

import org.apache.spark.SparkConf
import org.apache.spark.SparkContext
// $example on$
import org.apache.spark.mllib.feature.ElementwiseProduct
import org.apache.spark.mllib.linalg.Vectors
// $example off$

object ElementwiseProductExample {

  def main(args: Array[String]): Unit = {

    val conf = new SparkConf().setAppName("ElementwiseProductExample")
    val sc = new SparkContext(conf)

    // $example on$
    // Create some vector data; also works for sparse vectors
    val data = sc.parallelize(Seq(Vectors.dense(1.0, 2.0, 3.0), Vectors.dense(4.0, 5.0, 6.0)))

    val transformingVector = Vectors.dense(0.0, 1.0, 2.0)
    val transformer = new ElementwiseProduct(transformingVector)

    // Batch transform and per-row transform give the same results:
    val transformedData = transformer.transform(data)
    val transformedData2 = data.map(x => transformer.transform(x))
    // $example off$

    println("transformedData: ")
    transformedData.collect.foreach(x => println(x))

    println("transformedData2: ")
    transformedData2.collect.foreach(x => println(x))

    sc.stop()
  }
}
// scalastyle:on println

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