def test_poly_eq(self):
# Ticket #554
x = np.poly1d([1, 2, 3])
y = np.poly1d([3, 4])
assert_(x != y)
assert_(x == x)
def test_poly_div(self):
# Ticket #553
u = np.poly1d([1, 2, 3])
v = np.poly1d([1, 2, 3, 4, 5])
q, r = np.polydiv(u, v)
assert_equal(q*v + r, u)
def test_polyder_return_type(self):
# Ticket #1249
assert_(isinstance(np.polyder(np.poly1d([1]), 0), np.poly1d))
assert_(isinstance(np.polyder([1], 0), np.ndarray))
assert_(isinstance(np.polyder(np.poly1d([1]), 1), np.poly1d))
assert_(isinstance(np.polyder([1], 1), np.ndarray))
def test_poly1d_nan_roots(self):
# Ticket #396
p = np.poly1d([np.nan, np.nan, 1], r=0)
assert_raises(np.linalg.LinAlgError, getattr, p, "r")
def test_poly1d(self):
# Ticket #28
assert_equal(np.poly1d([1]) - np.poly1d([1, 0]),
np.poly1d([-1, 1]))