Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * This file is part of the Java Machine Learning Library
 * <p/>
 * The Java Machine Learning Library 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 2 of the License, or
 * (at your option) any later version.
 * <p/>
 * The Java Machine Learning 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 General Public License for more details.
 * <p/>
 * You should have received a copy of the GNU General Public License
 * along with the Java Machine Learning Library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 * <p/>
 * Copyright (c) 2006-2012, Thomas Abeel
 * <p/>
 * Project: http://java-ml.sourceforge.net/
 */

public class Main {
    /**
     * Normalizes the doubles in the array by their sum.
     *
     * @param doubles
     *            the array of double
     * @exception IllegalArgumentException
     *                if sum is Zero or NaN
     */
    public static void normalize(double[] doubles) {
        normalize(doubles, sum(doubles));
    }

    /**
     * Normalizes the doubles in the array using the given value.
     *
     * @param doubles
     *            the array of double
     * @param sum
     *            the value by which the doubles are to be normalized
     * @exception IllegalArgumentException
     *                if sum is zero or NaN
     */
    public static void normalize(double[] doubles, double sum) {
        if (Double.isNaN(sum)) {
            throw new IllegalArgumentException("Can't normalize array. Sum is NaN.");
        }
        if (sum == 0) {
            return;
        }
        for (int i = 0; i < doubles.length; i++) {
            doubles[i] /= sum;
        }
    }

    /**
     * Computes the sum of the elements of an array of doubles.
     *
     * @param doubles
     *            the array of double
     * @return the sum of the elements
     */
    public static double sum(double[] doubles) {

        double sum = 0;

        for (int i = 0; i < doubles.length; i++) {
            sum += doubles[i];
        }
        return sum;
    }

    public static double[] sum(double[] a, double[] b) {
        double[] out = a.clone();
        for (int i = 0; i < out.length; i++)
            out[i] += b[i];
        return out;
    }
}