Java List Mean getStandardDeviation(List doubles, Double mean)

Description

get Standard Deviation

License

Open Source License

Declaration

public static Double getStandardDeviation(List<Double> doubles, Double mean) 

Method Source Code

//package com.java2s;
/*//from   w ww  . j  a  v  a  2 s .  c  o m
 * Spirit, a study/biosample management tool for research.
 * Copyright (C) 2018 Idorsia Pharmaceuticals Ltd., Hegenheimermattweg 91,
 * CH-4123 Allschwil, Switzerland.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 * @author Joel Freyss
 */

import java.util.List;

public class Main {
    public static Double getStandardDeviation(List<Double> doubles, Double mean) {
        double sum = 0;
        int i = 0;
        for (Double d : doubles) {
            if (d == null)
                continue;
            sum += (d - mean) * (d - mean);
            i++;
        }
        return i == 0 ? null : Math.sqrt(sum / i);
    }
}

Related

1. geometricMean(List vals, double replacement)
2. getHMean(List harray)
3. getMean(List data)
4. getMean(List list)
5. getStandardDeviation(double meanValue, List values)
6. getStandardDeviationOfMean(List doubles)
7. mean(double[] list)
8. mean(final List list)
9. mean(List data)