Here you can find the source of abs(double[][] A)
public static double[][] abs(double[][] A)
//package com.java2s; /*/* ww w .j av a 2s .com*/ * This program 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 3 of the License, or * (at your option) any later version. * * This program 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. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ public class Main { /** * absolute value */ public static double[][] abs(double[][] A) { double[][] C = new double[A.length][A[0].length]; for (int i = 0; i < A.length; i++) { for (int j = 0; j < A[i].length; j++) { C[i][j] = Math.abs(A[i][j]); } } return C; } }