@Test
	public void string_test() {
		
		try{
		double []vec1= {1.0,2.0};
		String result= Vector.toString(vec1);
		String expected="                     1.0\n                     2.0\n";
		Assert.assertEquals(result,expected);
		}		
		catch (Exception e) {
			// TODO Auto-generated catch block
			fail("Not yet implemented");
		}
	}