def test11():
X = np.array([[10, 11, 9], [4, 6, 9]]).T
Z = fracdiff(X, order=1)
target = np.array([[np.nan, 1.0, -2.0], [np.nan, 2.0, 3.0]]).T
npt.assert_allclose(Z, target)
def test8():
x = np.array([10, 11, 9])
z = fracdiff(x, order=2)
target = np.array([np.nan, np.nan, -3.0])
npt.assert_allclose(z, target)
def test7():
x = np.array([10, 11, 9])
z = fracdiff(x, order=1)
target = np.array([np.nan, 1.0, -2.0])
npt.assert_allclose(z, target)
def test1():
x = np.array([10, 11, 9])
w = [1.0, -1.0]
z = fracdiff(x, weights=w)
target = np.array([np.nan, 1.0, -2.0])
npt.assert_allclose(z, target)
def test4():
x = np.array([10, 11, 9])
z = fracdiff(x, order=2, truncation='find')
target = np.array([np.nan, np.nan, -3.0])
npt.assert_allclose(z, target)