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.math.stat.descriptive.rank; 18 19 import java.io.Serializable; 20 21 22 /** 23 * Returns the median of the available values. This is the same as the 50th percentile. 24 * See {@link Percentile} for a description of the algorithm used. 25 * <p> 26 * <strong>Note that this implementation is not synchronized.</strong> If 27 * multiple threads access an instance of this class concurrently, and at least 28 * one of the threads invokes the <code>increment()</code> or 29 * <code>clear()</code> method, it must be synchronized externally.</p> 30 * 31 * @version $Revision: 811685 $ $Date: 2009-09-05 19:36:48 +0200 (sam. 05 sept. 2009) $ 32 */ 33 public class Median extends Percentile implements Serializable { 34 35 /** Serializable version identifier */ 36 private static final long serialVersionUID = -3961477041290915687L; 37 38 /** 39 * Default constructor. 40 */ 41 public Median() { 42 super(50.0); 43 } 44 45 /** 46 * Copy constructor, creates a new {@code Median} identical 47 * to the {@code original} 48 * 49 * @param original the {@code Median} instance to copy 50 */ 51 public Median(Median original) { 52 super(original); 53 } 54 55 } 56
