def test_impL1_num_den(self):
"""Test function for impL1() 2/4"""
sys1 = (np.array([-.4]), np.array([0, 0]), 1)
num = np.poly(sys1[0])
den = np.poly(sys1[1])
num[0] *= sys1[2]
tf = (num, den)
r3 = ds.impL1(tf, n=10)
self.assertTrue(np.allclose(self.r2, r3, atol=1e-8, rtol=1e-4))
def test_impL1_cplx(self):
"""Test function for impL1() 4/4"""
res = np.array([0.00000000000000 + 0.00000000000000j,
0.333000000000000 - 0.333000000000000j,
-0.110889000000000 + 0.110889000000000j,
0.0369260370000000 - 0.0369260370000000j,
-0.0122963703210000 + 0.0122963703210000j,
0.00409469131689300 - 0.00409469131689300j,
-0.00136353220852537 + 0.00136353220852537j,
0.000454056225438948 - 0.000454056225438948j,
-0.000151200723071170 + 0.000151200723071170j,
5.03498407826996e-05 - 5.03498407826996e-05j,
-1.67664969806390e-05 + 1.67664969806390e-05j])
a = [[-.3333], [-.3333j], 1]
y = ds.impL1(a)
self.assertTrue(np.allclose(y, res, atol=1e-3, rtol=1e-4))
def test_impL1_lti(self):
"""Test function for impL1() 3/4"""
sys1 = (np.array([-.4]), np.array([0, 0]), 1)
tf = lti(*sys1)
r4 = ds.impL1(tf, n=10)
self.assertTrue(np.allclose(self.r2, r4, atol=1e-8, rtol=1e-4))
def test_impL1_zpk(self):
"""Test function for impL1() 1/4"""
sys1 = (np.array([-.4]), np.array([0, 0]), 1) # zpk
r1 = ds.impL1(sys1, n=10)
self.assertTrue(np.allclose(r1, self.r2, atol=1e-8, rtol=1e-4))