public static void unitize(double[] array) {
        unitize2(array);
    }
@Test
    public void testUnitize() {
        System.out.println("unitize");
        double[] data = {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0};
        MathEx.unitize(data);
        assertEquals(1, MathEx.norm(data), 1E-7);
    }