@Test
	public void scale_test() {
		
		try{
		double [][]mat1= {{1.0,2.0}, {3.0,1.0}};
		double factor= 2;
		double[][]result = Matrix.scale(mat1, factor);
		double exp[][]={{2.0,4.0},{6.0,2.0}};
		Assert.assertArrayEquals(exp, result);
		}		
		catch (Exception e) {
			// TODO Auto-generated catch block
			fail("Not yet implemented");
		}
	}