def test_conversion(self):
# Check the conversion functions
s = StateSpace(1, 2, 3, 4)
assert_(isinstance(s.to_ss(), StateSpace))
assert_(isinstance(s.to_tf(), TransferFunction))
assert_(isinstance(s.to_zpk(), ZerosPolesGain))
# Make sure copies work
assert_(StateSpace(s) is not s)
assert_(s.to_ss() is not s)
def test_properties(self):
# Test setters/getters for cross class properties.
# This implicitly tests to_tf() and to_zpk()
# Getters
s = StateSpace(1, 1, 1, 1)
assert_equal(s.num, [1, 0])
assert_equal(s.den, [1, -1])
assert_equal(s.poles, [1])
assert_equal(s.zeros, [0])
assert_equal(s.gain, 1)
# transfer function setters
s2 = StateSpace(2, 2, 2, 2)
s2.num = [1, 0]
s2.den = [1, -1]
self._compare_systems(s, s2)
# zpk setters
s2 = StateSpace(2, 2, 2, 2)
s2.poles = 1
s2.zeros = 0
s2.gain = 1
self._compare_systems(s, s2)
def test_initialization(self):
# Check that all initializations work
s = StateSpace(1, 1, 1, 1)
s = StateSpace([1], [2], [3], [4])
s = StateSpace(np.array([[1, 2], [3, 4]]), np.array([[1], [2]]),
np.array([[1, 0]]), np.array([[0]]))