Find the maximum of the absolute values of all elements in the array, ignoring elements that are NaN. - Java java.lang

Java examples for java.lang:Math Array Function

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Description

Find the maximum of the absolute values of all elements in the array, ignoring elements that are NaN.

Demo Code

/**//from   w  w  w . j a v  a 2  s.  c  o m
 * Copyright 2004-2006 DFKI GmbH.
 * All Rights Reserved.  Use is subject to license terms.
 * 
 * Permission is hereby granted, free of charge, to use and distribute
 * this software and its documentation without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of this work, and to
 * permit persons to whom this work is furnished to do so, subject to
 * the following conditions:
 * 
 * 1. The code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 * 2. Any modifications must be clearly marked as such.
 * 3. Original authors' names are not deleted.
 * 4. The authors' names are not used to endorse or promote products
 *    derived from this software without specific prior written
 *    permission.
 *
 * DFKI GMBH AND THE CONTRIBUTORS TO THIS WORK DISCLAIM ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL DFKI GMBH NOR THE
 * CONTRIBUTORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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 */
//package com.java2s;

public class Main {
    /**
     * Find the maximum of the absolute values of all elements in the array, ignoring elements that are NaN.
     *
     * @param data the data
     * @return the double
     */
    public static double absMax(double[] data) {
        double max = Double.NaN;
        for (int i = 0; i < data.length; i++) {
            if (Double.isNaN(data[i]))
                continue;
            double abs = Math.abs(data[i]);
            if (Double.isNaN(max) || abs > max)
                max = abs;
        }
        return max;
    }
}

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