/** toy example */ public static void test2() { int N = 500; double[][] m1 = new double[N][N]; double[][] m2 = new double[N][N]; double[][] m3 = new double[N][N]; // init Random rand = new Random(); for (int i = 0; i < N; i++) for (int j = 0; j < N; j++) { m1[i][j] = 10 * (rand.nextDouble() - 0.2); m2[i][j] = 20 * (rand.nextDouble() - 0.8); } // inverse System.out.println("Start"); Matrix mat1 = new Matrix(m1); Matrix mat2 = mat1.inverse(); Matrix mat3 = mat1.times(mat2); double[][] m4 = mat3.getArray(); /* for (int i = 0; i < m4.length; i++) { int ss = 10; for (int j = 0; j < ss; j++) { System.out.printf("%f ", m4[i][j]); } System.out.print("\n"); } */ System.out.println("Done"); /* // matrix * System.out.println("Start"); for (int i = 0; i < N; i++) for (int j = 0; j < N; j++) { double cell = 0; for (int k = 0; k < N; k++) cell += m1[i][k] * m2[k][j]; // System.out.printf("%f ", cell); m3[i][j] = cell; } System.out.println("Done"); */ }