def __init__(self, dtype=float, **kwargs):
self.true = results_kalman_filter.uc_bi
self.true_states = pd.DataFrame(self.true['states'])
# GDP and Unemployment, Quarterly, 1948.1 - 1995.3
data = pd.DataFrame(
self.true['data'],
index=pd.date_range('1947-01-01', '1995-07-01', freq='QS'),
columns=['GDP', 'UNEMP']
)[4:]
data['GDP'] = np.log(data['GDP'])
data['UNEMP'] = (data['UNEMP']/100)
k_states = 6
self.model = Model(data, k_states=k_states, **kwargs)
# Statespace representation
self.model.design[:, :, 0] = [[1, 1, 0, 0, 0, 0], [0, 0, 0, 0, 0, 1]]
self.model.transition[
([0, 0, 1, 1, 2, 3, 4, 5],
[0, 4, 1, 2, 1, 2, 4, 5],
[0, 0, 0, 0, 0, 0, 0, 0])
] = [1, 1, 0, 0, 1, 1, 1, 1]
self.model.selection = np.eye(self.model.k_states)
# Update matrices with given parameters
(sigma_v, sigma_e, sigma_w, sigma_vl, sigma_ec,
phi_1, phi_2, alpha_1, alpha_2, alpha_3) = np.array(
self.true['parameters'],
)
self.model.design[([1, 1, 1], [1, 2, 3], [0, 0, 0])] = [
alpha_1, alpha_2, alpha_3
]
self.model.transition[([1, 1], [1, 2], [0, 0])] = [phi_1, phi_2]
self.model.obs_cov[1, 1, 0] = sigma_ec**2
self.model.state_cov[
np.diag_indices(k_states)+(np.zeros(k_states, dtype=int),)] = [
sigma_v**2, sigma_e**2, 0, 0, sigma_w**2, sigma_vl**2
]
# Initialization
initial_state = np.zeros((k_states,))
initial_state_cov = np.eye(k_states)*100
# Initialization: self.modelification
initial_state_cov = np.dot(
np.dot(self.model.transition[:, :, 0], initial_state_cov),
self.model.transition[:, :, 0].T
)
self.model.initialize_known(initial_state, initial_state_cov)
def __init__(self, *args, **kwargs):
# Dummy data
endog = np.arange(10)
k_states = 1
self.model = Model(endog, k_states, *args, **kwargs)
def test_slice_notation():
endog = np.arange(10)*1.0
mod = Model(endog, k_states=2)
# Test invalid __setitem__
def set_designs():
mod['designs'] = 1
def set_designs2():
mod['designs',0,0] = 1
def set_designs3():
mod[0] = 1
assert_raises(IndexError, set_designs)
assert_raises(IndexError, set_designs2)
assert_raises(IndexError, set_designs3)
# Test invalid __getitem__
assert_raises(IndexError, lambda: mod['designs'])
assert_raises(IndexError, lambda: mod['designs',0,0,0])
assert_raises(IndexError, lambda: mod[0])
# Test valid __setitem__, __getitem__
assert_equal(mod.design[0,0,0], 0)
mod['design',0,0,0] = 1
assert_equal(mod['design'].sum(), 1)
assert_equal(mod.design[0,0,0], 1)
assert_equal(mod['design',0,0,0], 1)
# Test valid __setitem__, __getitem__ with unspecified time index
mod['design'] = np.zeros(mod['design'].shape)
assert_equal(mod.design[0,0], 0)
mod['design',0,0] = 1
assert_equal(mod.design[0,0], 1)
assert_equal(mod['design',0,0], 1)
def __init__(self, dtype=float, **kwargs):
self.true = results_kalman_filter.uc_uni
self.true_states = pd.DataFrame(self.true['states'])
# GDP, Quarterly, 1947.1 - 1995.3
data = pd.DataFrame(
self.true['data'],
index=pd.date_range('1947-01-01', '1995-07-01', freq='QS'),
columns=['GDP']
)
data['lgdp'] = np.log(data['GDP'])
# Construct the statespace representation
k_states = 4
self.model = Model(data['lgdp'], k_states=k_states, **kwargs)
self.model.design[:, :, 0] = [1, 1, 0, 0]
self.model.transition[([0, 0, 1, 1, 2, 3],
[0, 3, 1, 2, 1, 3],
[0, 0, 0, 0, 0, 0])] = [1, 1, 0, 0, 1, 1]
self.model.selection = np.eye(self.model.k_states)
# Update matrices with given parameters
(sigma_v, sigma_e, sigma_w, phi_1, phi_2) = np.array(
self.true['parameters']
)
self.model.transition[([1, 1], [1, 2], [0, 0])] = [phi_1, phi_2]
self.model.state_cov[
np.diag_indices(k_states)+(np.zeros(k_states, dtype=int),)] = [
sigma_v**2, sigma_e**2, 0, sigma_w**2
]
# Initialization
initial_state = np.zeros((k_states,))
initial_state_cov = np.eye(k_states)*100
# Initialization: modification
initial_state_cov = np.dot(
np.dot(self.model.transition[:, :, 0], initial_state_cov),
self.model.transition[:, :, 0].T
)
self.model.initialize_known(initial_state, initial_state_cov)
class Clark1987(object):
"""
Clark's (1987) univariate unobserved components model of real GDP (as
presented in Kim and Nelson, 1999)
Test data produced using GAUSS code described in Kim and Nelson (1999) and
found at http://econ.korea.ac.kr/~cjkim/SSMARKOV.htm
See `results.results_kalman_filter` for more information.
"""
def __init__(self, dtype=float, **kwargs):
self.true = results_kalman_filter.uc_uni
self.true_states = pd.DataFrame(self.true['states'])
# GDP, Quarterly, 1947.1 - 1995.3
data = pd.DataFrame(
self.true['data'],
index=pd.date_range('1947-01-01', '1995-07-01', freq='QS'),
columns=['GDP']
)
data['lgdp'] = np.log(data['GDP'])
# Construct the statespace representation
k_states = 4
self.model = Model(data['lgdp'], k_states=k_states, **kwargs)
self.model.design[:, :, 0] = [1, 1, 0, 0]
self.model.transition[([0, 0, 1, 1, 2, 3],
[0, 3, 1, 2, 1, 3],
[0, 0, 0, 0, 0, 0])] = [1, 1, 0, 0, 1, 1]
self.model.selection = np.eye(self.model.k_states)
# Update matrices with given parameters
(sigma_v, sigma_e, sigma_w, phi_1, phi_2) = np.array(
self.true['parameters']
)
self.model.transition[([1, 1], [1, 2], [0, 0])] = [phi_1, phi_2]
self.model.state_cov[
np.diag_indices(k_states)+(np.zeros(k_states, dtype=int),)] = [
sigma_v**2, sigma_e**2, 0, sigma_w**2
]
# Initialization
initial_state = np.zeros((k_states,))
initial_state_cov = np.eye(k_states)*100
# Initialization: modification
initial_state_cov = np.dot(
np.dot(self.model.transition[:, :, 0], initial_state_cov),
self.model.transition[:, :, 0].T
)
self.model.initialize_known(initial_state, initial_state_cov)
def run_filter(self):
# Filter the data
self.results = self.model.filter()
def test_loglike(self):
assert_almost_equal(
self.results.llf_obs[self.true['start']:].sum(),
self.true['loglike'], 5
)
def test_filtered_state(self):
assert_almost_equal(
self.results.filtered_state[0][self.true['start']:],
self.true_states.iloc[:, 0], 4
)
assert_almost_equal(
self.results.filtered_state[1][self.true['start']:],
self.true_states.iloc[:, 1], 4
)
assert_almost_equal(
self.results.filtered_state[3][self.true['start']:],
self.true_states.iloc[:, 2], 4
)
class Clark1989(object):
"""
Clark's (1989) bivariate unobserved components model of real GDP (as
presented in Kim and Nelson, 1999)
Tests two-dimensional observation data.
Test data produced using GAUSS code described in Kim and Nelson (1999) and
found at http://econ.korea.ac.kr/~cjkim/SSMARKOV.htm
See `results.results_kalman_filter` for more information.
"""
def __init__(self, dtype=float, **kwargs):
self.true = results_kalman_filter.uc_bi
self.true_states = pd.DataFrame(self.true['states'])
# GDP and Unemployment, Quarterly, 1948.1 - 1995.3
data = pd.DataFrame(
self.true['data'],
index=pd.date_range('1947-01-01', '1995-07-01', freq='QS'),
columns=['GDP', 'UNEMP']
)[4:]
data['GDP'] = np.log(data['GDP'])
data['UNEMP'] = (data['UNEMP']/100)
k_states = 6
self.model = Model(data, k_states=k_states, **kwargs)
# Statespace representation
self.model.design[:, :, 0] = [[1, 1, 0, 0, 0, 0], [0, 0, 0, 0, 0, 1]]
self.model.transition[
([0, 0, 1, 1, 2, 3, 4, 5],
[0, 4, 1, 2, 1, 2, 4, 5],
[0, 0, 0, 0, 0, 0, 0, 0])
] = [1, 1, 0, 0, 1, 1, 1, 1]
self.model.selection = np.eye(self.model.k_states)
# Update matrices with given parameters
(sigma_v, sigma_e, sigma_w, sigma_vl, sigma_ec,
phi_1, phi_2, alpha_1, alpha_2, alpha_3) = np.array(
self.true['parameters'],
)
self.model.design[([1, 1, 1], [1, 2, 3], [0, 0, 0])] = [
alpha_1, alpha_2, alpha_3
]
self.model.transition[([1, 1], [1, 2], [0, 0])] = [phi_1, phi_2]
self.model.obs_cov[1, 1, 0] = sigma_ec**2
self.model.state_cov[
np.diag_indices(k_states)+(np.zeros(k_states, dtype=int),)] = [
sigma_v**2, sigma_e**2, 0, 0, sigma_w**2, sigma_vl**2
]
# Initialization
initial_state = np.zeros((k_states,))
initial_state_cov = np.eye(k_states)*100
# Initialization: self.modelification
initial_state_cov = np.dot(
np.dot(self.model.transition[:, :, 0], initial_state_cov),
self.model.transition[:, :, 0].T
)
self.model.initialize_known(initial_state, initial_state_cov)
def run_filter(self):
# Filter the data
self.results = self.model.filter()
def test_loglike(self):
assert_almost_equal(
# self.results.llf_obs[self.true['start']:].sum(),
self.results.llf_obs[0:].sum(),
self.true['loglike'], 2
)
def test_filtered_state(self):
assert_almost_equal(
self.results.filtered_state[0][self.true['start']:],
self.true_states.iloc[:, 0], 4
)
assert_almost_equal(
self.results.filtered_state[1][self.true['start']:],
self.true_states.iloc[:, 1], 4
)
assert_almost_equal(
self.results.filtered_state[4][self.true['start']:],
self.true_states.iloc[:, 2], 4
)
assert_almost_equal(
self.results.filtered_state[5][self.true['start']:],
self.true_states.iloc[:, 3], 4
)
