Java List Mean getHMean(List harray)

Description

Compute mean for a given set of numbers

License

Apache License

Parameter

Parameter	Description
harray	of numbers (measurements)

Return

mean

Declaration

public static double getHMean(List<Number> harray) 

Method Source Code

//package com.java2s;
/*/* w w w  .j a  v a2s .c  o  m*/
 * Copyright 2014-2015 JKOOL, LLC.
 *
 * 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.Iterator;
import java.util.List;

public class Main {
    /**
     * Compute mean for a given set of numbers
     *
     * @param harray of numbers (measurements)
     * @return mean
     */
    public static double getHMean(List<Number> harray) {
        Iterator<Number> it = harray.iterator();
        double vsum = 0, mean = 0;
        int count = 0;
        while (it.hasNext()) {
            Number vl = it.next();
            double val = vl.doubleValue();
            vsum += val;
            count++;
        }
        mean = count > 0 ? vsum / count : mean;
        return mean;
    }

    /**
     * Compute mean for a given set of numbers and number of elements
     *
     * @param harray of numbers (measurements)
     * @param nPeriod an N-period for which to compute the mean
     * @return mean
     */
    public static double getHMean(List<Number> harray, int nPeriod) {
        double vsum = 0, mean = 0;
        int count = 0;
        Iterator<Number> it = harray.iterator();
        while (it.hasNext() && (count < nPeriod)) {
            Number vl = it.next();
            double val = vl.doubleValue();
            vsum += val;
            count++;
        }
        mean = count > 0 ? vsum / count : mean;
        return mean;
    }
}

Related

1. calculateStDev(List values, double mean)
2. computeMean(List fs)
3. geometricMean(List vals, double replacement)
4. getMean(List data)
5. getMean(List list)
6. getStandardDeviation(double meanValue, List values)
7. getStandardDeviation(List doubles, Double mean)