1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.commons.math4.legacy.ml.clustering; 18 19 /** 20 * A Cluster used by centroid-based clustering algorithms. 21 * <p> 22 * Defines additionally a cluster center which may not necessarily be a member 23 * of the original data set. 24 * 25 * @param <T> the type of points that can be clustered 26 * @since 3.2 27 */ 28 public class CentroidCluster<T extends Clusterable> extends Cluster<T> { 29 /** Center of the cluster. */ 30 private final Clusterable center; 31 32 /** 33 * Build a cluster centered at a specified point. 34 * @param center the point which is to be the center of this cluster 35 */ 36 public CentroidCluster(final Clusterable center) { 37 super(); 38 this.center = center; 39 } 40 41 /** 42 * Get the point chosen to be the center of this cluster. 43 * @return chosen cluster center 44 */ 45 Clusterable getCenter() { 46 return center; 47 } 48 }