Method to calculate mean of an array - Java Collection Framework

Java examples for Collection Framework:Array Algorithm

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Description

Method to calculate mean of an array

Demo Code

/* The MIT License (MIT)
 * /*  w w  w.j a va2  s. c  om*/
 * Copyright (c) 2015 Tinotenda Chemvura
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
//package com.java2s;

public class Main {
    /**
     * Method to calculate mean of an array
     * 
     * @param arr
     *            Array whose mean is to be calculated
     * @return mean of the input array
     */
    public static double meanArray(double[] arr) {
        double out = 0.0;
        for (int i = 0; i < arr.length; i++)
            out += arr[i];
        return out / (1.0 * arr.length);
    }
}

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