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/*
* 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;
import scala.Tuple3;
import com.google.common.collect.Lists;
import org.apache.spark.SparkConf;
import org.apache.spark.api.java.JavaRDD;
import org.apache.spark.api.java.JavaSparkContext;
// $example on$
import org.apache.spark.mllib.clustering.PowerIterationClustering;
import org.apache.spark.mllib.clustering.PowerIterationClusteringModel;
// $example off$
/**
* Java example for graph clustering using power iteration clustering (PIC).
*/
public class JavaPowerIterationClusteringExample {
public static void main(String[] args) {
SparkConf sparkConf = new SparkConf().setAppName("JavaPowerIterationClusteringExample");
JavaSparkContext sc = new JavaSparkContext(sparkConf);
@SuppressWarnings("unchecked")
// $example on$
JavaRDD<Tuple3<Long, Long, Double>> similarities = sc.parallelize(Lists.newArrayList(
new Tuple3<>(0L, 1L, 0.9),
new Tuple3<>(1L, 2L, 0.9),
new Tuple3<>(2L, 3L, 0.9),
new Tuple3<>(3L, 4L, 0.1),
new Tuple3<>(4L, 5L, 0.9)));
PowerIterationClustering pic = new PowerIterationClustering()
.setK(2)
.setMaxIterations(10);
PowerIterationClusteringModel model = pic.run(similarities);
for (PowerIterationClustering.Assignment a: model.assignments().toJavaRDD().collect()) {
System.out.println(a.id() + " -> " + a.cluster());
}
// $example off$
sc.stop();
}
}
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