org.apache.commons.math3.stat.descriptive.rank.Median Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of commons-math3 Show documentation

The Math project is a library of lightweight, self-contained mathematics and statistics components addressing the most common practical problems not immediately available in the Java programming language or commons-lang.

There is a newer version: 3.6.1

Show newest version

/*
 * 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.commons.math3.stat.descriptive.rank;

import java.io.Serializable;


/**
 * Returns the median of the available values.  This is the same as the 50th percentile.
 * See {@link Percentile} for a description of the algorithm used.
 * 
 * Note that this implementation is not synchronized. If
 * multiple threads access an instance of this class concurrently, and at least
 * one of the threads invokes the increment() or
 * clear() method, it must be synchronized externally.
 *
 * @version $Id: Median.java 1244107 2012-02-14 16:17:55Z erans $
 */
public class Median extends Percentile implements Serializable {

    /** Serializable version identifier */
    private static final long serialVersionUID = -3961477041290915687L;

    /**
     * Default constructor.
     */
    public Median() {
        super(50.0);
    }

    /**
     * Copy constructor, creates a new {@code Median} identical
     * to the {@code original}
     *
     * @param original the {@code Median} instance to copy
     */
    public Median(Median original) {
        super(original);
    }

}