spark JavaElementwiseProductExample 源码
spark JavaElementwiseProductExample 代码
文件路径：/examples/src/main/java/org/apache/spark/examples/mllib/JavaElementwiseProductExample.java
/*
* 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.examples.mllib;
// $example on$
import java.util.Arrays;
// $example off$
import org.apache.spark.SparkConf;
import org.apache.spark.api.java.JavaSparkContext;
// $example on$
import org.apache.spark.api.java.JavaRDD;
import org.apache.spark.mllib.feature.ElementwiseProduct;
import org.apache.spark.mllib.linalg.Vector;
import org.apache.spark.mllib.linalg.Vectors;
// $example off$
public class JavaElementwiseProductExample {
public static void main(String[] args) {
SparkConf conf = new SparkConf().setAppName("JavaElementwiseProductExample");
JavaSparkContext jsc = new JavaSparkContext(conf);
// $example on$
// Create some vector data; also works for sparse vectors
JavaRDD<Vector> data = jsc.parallelize(Arrays.asList(
Vectors.dense(1.0, 2.0, 3.0), Vectors.dense(4.0, 5.0, 6.0)));
Vector transformingVector = Vectors.dense(0.0, 1.0, 2.0);
ElementwiseProduct transformer = new ElementwiseProduct(transformingVector);
// Batch transform and per-row transform give the same results:
JavaRDD<Vector> transformedData = transformer.transform(data);
JavaRDD<Vector> transformedData2 = data.map(transformer::transform);
// $example off$
System.out.println("transformedData: ");
transformedData.foreach(System.out::println);
System.out.println("transformedData2: ");
transformedData2.foreach(System.out::println);
jsc.stop();
}
}
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