def test_cos(self):
lbs = np.linspace(-2 * math.pi, 2 * math.pi, 10)
ubs = np.linspace(-2 * math.pi, 2 * math.pi, 10)
for xl in lbs:
for xu in ubs:
if xu >= xl:
zl, zu = interval.cos(xl, xu)
x = np.linspace(xl, xu, 100)
_z = np.cos(x)
self.assertTrue(np.all(zl <= _z))
self.assertTrue(np.all(zu >= _z))
def test_cos(self):
if not numpy_available:
raise unittest.SkipTest('Numpy is not available.')
lbs = np.linspace(-2 * math.pi, 2 * math.pi, 10)
ubs = np.linspace(-2 * math.pi, 2 * math.pi, 10)
for xl in lbs:
for xu in ubs:
if xu >= xl:
zl, zu = self.cos(xl, xu)
x = np.linspace(xl, xu, 100)
_z = np.cos(x)
self.assertTrue(np.all(zl <= _z + 1e-14))
self.assertTrue(np.all(zu >= _z - 1e-14))