Java List std getStandardDeviation(List values)

Description

get Standard Deviation

License

Apache License

Declaration

public static double getStandardDeviation(List<Double> values) 

Method Source Code

//package com.java2s;
/**************************************************************************************
Copyright 2015 Applied Research Associates, Inc.
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://from www  .j ava 2 s  . c  o m
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 double getStandardDeviation(List<Double> values) {
        double sum = 0;
        double avg = getAverage(values);
        for (double d : values)
            sum += (d - avg) * (d - avg);
        return Math.sqrt(sum / values.size());
    }

    public static double getAverage(List<Double> values) {
        double sum = 0;
        for (double d : values)
            sum += d;
        return sum / values.size();
    }

    public static double getAverage(double[] ary) {
        double sum = 0;
        for (double d : ary)
            sum += d;
        return sum / ary.length;
    }
}

Related

1. calculateStandardDeviation(List doubleList)
2. getStandardDeviation(List data)
3. getStandardDeviation(List list)
4. getStdDeviation(List numbers)
5. standardDeviation(List data)
6. standardDeviation(List values)
7. standardDeviation(List list)