Java List Average getStandardDeviation(List longList, long average, long devByZero)

Description

get Standard Deviation

License

Apache License

Declaration

public static long getStandardDeviation(List<Long> longList, long average, long devByZero) 

Method Source Code

//package com.java2s;
/*//w ww .ja  v a  2  s  .c  om
 * Licensed 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.
 */

import java.util.List;

public class Main {

    public static long getStandardDeviation(List<Long> longList, long average, long devByZero) {

        if (longList == null || longList.isEmpty()) {
            return devByZero;
        }

        double sd = 0.0d;

        for (long l : longList) {
            sd += Math.pow(l - average, 2);
        }

        sd = Math.sqrt(sd / (double) longList.size());

        return Math.round(sd);
    }
}

Related

1. getAverage(List values)
2. getAverage(List numbers)
3. getAverageColour(List colours)
4. getAverageDuration(List durations)
5. getAverageInterval(List tapTimestamps, int n)