test_regression.py 文件源码

def test_svd_build(self, level=rlevel):
        # Ticket 627.
        a = array([[0., 1.], [1., 1.], [2., 1.], [3., 1.]])
        m, n = a.shape
        u, s, vh = linalg.svd(a)

        b = dot(transpose(u[:, n:]), a)

        assert_array_almost_equal(b, np.zeros((2, 2)))