Average absolute value in Collection - Java java.util

Java examples for java.util:Collection Element

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Description

Average absolute value in Collection

Demo Code

/*//ww  w. j  a  va2 s  . c o  m
 **    Copyright (C) 2003-2012 Institute for Systems Biology 
 **                            Seattle, Washington, USA. 
 **
 **    This library is free software; you can redistribute it and/or
 **    modify it under the terms of the GNU Lesser General Public
 **    License as published by the Free Software Foundation; either
 **    version 2.1 of the License, or (at your option) any later version.
 **
 **    This library 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
 **    Lesser General Public License for more details.
 **
 **    You should have received a copy of the GNU Lesser General Public
 **    License along with this library; if not, write to the Free Software
 **    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
//package com.java2s;
import java.util.Collection;

import java.util.Iterator;

public class Main {
    /***************************************************************************
     **
     ** Average absolute value
     */

    public static double avgAbsVal(Collection vals) {
        Iterator vit = vals.iterator();
        double sum = 0.0;
        int num = vals.size();
        if (num == 0) {
            return (Double.NaN);
        }
        while (vit.hasNext()) {
            Double val0bj = (Double) vit.next();
            if (val0bj.isNaN()) {
                return (val0bj.doubleValue());
            }
            double val = Math.abs(val0bj.doubleValue());
            sum += val;
        }
        return (sum / (double) num);
    }
}

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