def test_conversion(self):
#Check the conversion functions
s = ZerosPolesGain(1, 2, 3)
assert_(isinstance(s.to_ss(), StateSpace))
assert_(isinstance(s.to_tf(), TransferFunction))
assert_(isinstance(s.to_zpk(), ZerosPolesGain))
# Make sure copies work
assert_(ZerosPolesGain(s) is not s)
assert_(s.to_zpk() is not s)
def test_properties(self):
# Test setters/getters for cross class properties.
# This implicitly tests to_ss() and to_tf()
# Getters
s = ZerosPolesGain(0, 1, 1)
assert_equal(s.num, [1, 0])
assert_equal(s.den, [1, -1])
assert_equal(s.A, 1)
assert_equal(s.B, 1)
assert_equal(s.C, 1)
assert_equal(s.D, 1)
# state space setters
s2 = ZerosPolesGain([2], [6], 3)
s2.A = 1
s2.B = 1
s2.C = 1
s2.D = 1
self._compare_systems(s, s2)
# tf setters
s2 = ZerosPolesGain([2], [5], 3)
s2.num = [1, 0]
s2.den = [1, -1]
self._compare_systems(s, s2)
def test_initialization(self):
# Check that all initializations work
s = ZerosPolesGain(1, 1, 1)
s = ZerosPolesGain([1], [2], 1)
s = ZerosPolesGain(np.array([1]), np.array([2]), 1)
