Here you can find the source of normalize(final double[] tab)
public static double[] normalize(final double[] tab)
//package com.java2s; /*#//from w w w . ja va2s . c om * The MIT License (MIT) * * Copyright (c) 2016 LE SAUCE Julien * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. #*/ public class Main { public static double[] normalize(final double[] tab) { if (tab == null) { throw new NullPointerException("Array cannot be null"); } if (tab.length == 0) { throw new IllegalArgumentException("Array has zero length"); } // Recherche de la valeur absolue du max double max = Math.abs(tab[maxAbs(tab)]); // On divise toutes les valeurs par le maximum for (int i = 0; i < tab.length; i++) { tab[i] /= max; } return tab; } public static int maxAbs(final double[] tab) { if (tab == null) { throw new NullPointerException("Array cannot be null"); } if (tab.length == 0) { throw new IllegalArgumentException("Array has zero length"); } int index = 0; double max = tab[0]; for (int i = 0; i < tab.length; i++) { if (tab[i] > max) { index = i; max = tab[i]; } } return index; } }