def test_equivalence_GSFA_PCA_for_DT_0():
""" Test of iGSFA and PCA when delta_threshold is smaller than 0.0
"""
x = numx.random.normal(size=(300, 15))
n = iGSFANode(output_dim=5, slow_feature_scaling_method=None,
delta_threshold=0.0)
n.train(x, train_mode="regular")
# n.stop_training() has been automatically called
y = n.execute(x)
deltas_igsfa = comp_delta(y)
n2 = mdp.nodes.PCANode(output_dim=5)
n2.train(x)
n2.stop_training()
y2 = n2.execute(x)
deltas_pca = comp_delta(y2)
assert_array_almost_equal(deltas_igsfa, deltas_pca, decimal)
def test_equivalence_GSFA_PCA_for_DT_0():
""" Test of iGSFA and PCA when delta_threshold is smaller than 0.0
"""
x = numx.random.normal(size=(300, 15))
n = iGSFANode(output_dim=5,
slow_feature_scaling_method=None,
delta_threshold=0.0)
n.train(x, train_mode="regular")
# n.stop_training() has been automatically called
y = n.execute(x)
deltas_igsfa = comp_delta(y)
n2 = mdp.nodes.PCANode(output_dim=5)
n2.train(x)
n2.stop_training()
y2 = n2.execute(x)
deltas_pca = comp_delta(y2)
assert_array_almost_equal(deltas_igsfa, deltas_pca, decimal)
def test_equivalence_smirror_window32_mirror_window32():
"""Tests the equivalence of slow and fast mirroring sliding windows
for GSFA.
"""
x = numx.random.normal(size=(200, 15))
training_modes = ("smirror_window32", "mirror_window32")
delta_values = []
for training_mode in training_modes:
n = mdp.nodes.GSFANode(output_dim=5)
n.train(x, train_mode=training_mode)
n.stop_training()
y = n.execute(x)
delta = comp_delta(y)
delta_values.append(delta)
assert_array_almost_equal(delta_values[1], delta_values[0], decimal)
def test_equivalence_smirror_window32_mirror_window32():
"""Tests the equivalence of slow and fast mirroring sliding windows
for GSFA.
"""
x = numx.random.normal(size=(200, 15))
training_modes = ("smirror_window32", "mirror_window32")
delta_values = []
for training_mode in training_modes:
n = mdp.nodes.GSFANode(output_dim=5)
n.train(x, train_mode=training_mode)
n.stop_training()
y = n.execute(x)
delta = comp_delta(y)
delta_values.append(delta)
assert_array_almost_equal(delta_values[1], delta_values[0], decimal)