def test_mdla_dict_update():
n_kernels = 10
# n_samples, n_features, n_dims = 100, 5, 3
n_samples, n_features, n_dims = 80, 5, 3
X = [rng_global.randn(n_features, n_dims) for i in range(n_samples)]
dico = MultivariateDictLearning(
n_kernels=n_kernels, random_state=0, max_iter=10, n_jobs=-1
).fit(X)
first_epoch = list(dico.kernels_)
dico = dico.fit(X)
second_epoch = list(dico.kernels_)
for k, c in zip(first_epoch, second_epoch):
assert (k - c).sum() != 0.0
dico = MiniBatchMultivariateDictLearning(
n_kernels=n_kernels, random_state=0, n_iter=10, n_jobs=-1
).fit(X)
first_epoch = list(dico.kernels_)
dico = dico.fit(X)
second_epoch = list(dico.kernels_)
for k, c in zip(first_epoch, second_epoch):
assert (k - c).sum() != 0.0
dico = MiniBatchMultivariateDictLearning(
n_kernels=n_kernels, random_state=0, n_iter=10, n_jobs=-1
).partial_fit(X)
first_epoch = list(dico.kernels_)
dico = dico.partial_fit(X)
second_epoch = list(dico.kernels_)
for k, c in zip(first_epoch, second_epoch):
assert (k - c).sum() != 0.0
def test_multivariate_input_shape():
n_samples, n_features, n_dims = 10, 5, 3
X = [rng_global.randn(n_features, n_dims) for i in range(n_samples)]
n_kernels = 7
n_dims_w = 6
Xw = [rng_global.randn(n_features, n_dims_w) for i in range(n_samples)]
dico = MultivariateDictLearning(n_kernels=n_kernels).fit(X)
for i in range(n_kernels):
assert dico.kernels_[i].shape == (n_features, n_dims)
dico = MultivariateDictLearning(n_kernels=n_kernels)
assert_raises(ValueError, dico.fit, Xw)
dico = MiniBatchMultivariateDictLearning(n_kernels=n_kernels).fit(X)
for i in range(n_kernels):
assert dico.kernels_[i].shape == (n_features, n_dims)
dico = MiniBatchMultivariateDictLearning(n_kernels=n_kernels)
assert_raises(ValueError, dico.fit, Xw)
dico = MiniBatchMultivariateDictLearning(n_kernels=n_kernels).partial_fit(X)
for i in range(n_kernels):
assert dico.kernels_[i].shape == (n_features, n_dims)
dico = MiniBatchMultivariateDictLearning(n_kernels=n_kernels)
assert_raises(ValueError, dico.partial_fit, Xw)
def test_callback():
n_samples, n_features, n_dims = 10, 5, 3
X = [rng_global.randn(n_features, n_dims) for i in range(n_samples)]
n_kernels = 8
def my_callback(loc):
_ = loc["dict_obj"]
dico = MultivariateDictLearning(
n_kernels=n_kernels,
random_state=0,
max_iter=2,
n_nonzero_coefs=1,
callback=my_callback,
)
code = dico.fit(X).transform(X[0])
assert len(code[0]) <= 1
dico = MiniBatchMultivariateDictLearning(
n_kernels=n_kernels,
random_state=0,
n_iter=2,
n_nonzero_coefs=1,
callback=my_callback,
)
code = dico.fit(X).transform(X[0])
assert len(code[0]) <= 1
def test_dict_init():
n_samples, n_features, n_dims = 10, 5, 3
X = [rng_global.randn(n_features, n_dims) for i in range(n_samples)]
n_kernels = 8
d = [rng_global.randn(n_features, n_dims) for i in range(n_kernels)]
for i in range(len(d)):
d[i] /= np.linalg.norm(d[i], "fro")
dico = MultivariateDictLearning(
n_kernels=n_kernels,
random_state=0,
max_iter=1,
n_nonzero_coefs=1,
learning_rate=0.0,
dict_init=d,
verbose=5,
).fit(X)
dico = dico.fit(X)
for i in range(n_kernels):
assert_array_almost_equal(dico.kernels_[i], d[i])
# code = dico.fit(X).transform(X[0])
# assert (len(code[0]) > 1)
dico = MiniBatchMultivariateDictLearning(
n_kernels=n_kernels,
random_state=0,
n_iter=1,
n_nonzero_coefs=1,
dict_init=d,
verbose=1,
learning_rate=0.0,
).fit(X)
dico = dico.fit(X)
for i in range(n_kernels):
assert_array_almost_equal(dico.kernels_[i], d[i])
def test_n_kernels():
n_samples, n_features, n_dims = 10, 5, 3
X = [rng_global.randn(n_features, n_dims) for i in range(n_samples)]
dico = MultivariateDictLearning(
random_state=0, max_iter=2, n_nonzero_coefs=1, verbose=5
).fit(X)
assert len(dico.kernels_) == 2 * n_features
dico = MiniBatchMultivariateDictLearning(
random_state=0, n_iter=2, n_nonzero_coefs=1, verbose=5
).fit(X)
assert len(dico.kernels_) == 2 * n_features
dico = MiniBatchMultivariateDictLearning(
random_state=0, n_iter=2, n_nonzero_coefs=1, verbose=5
).partial_fit(X)
assert len(dico.kernels_) == 2 * n_features
def test_mdla_shuffle():
n_samples, n_features, n_dims = 10, 5, 3
X = [rng_global.randn(n_features, n_dims) for i in range(n_samples)]
n_kernels = 8
dico = MiniBatchMultivariateDictLearning(n_kernels=n_kernels,
random_state=0,
n_iter=3,
n_nonzero_coefs=1,
verbose=5,
shuffle=False)
code = dico.fit(X).transform(X[0])
assert_true(len(code[0]) <= 1)
def test_mdla_nonzero_coef_errors():
n_samples, n_features, n_dims = 10, 5, 3
X = [rng_global.randn(n_features, n_dims) for i in range(n_samples)]
n_kernels = 8
dico = MultivariateDictLearning(
n_kernels=n_kernels, random_state=0, max_iter=2, n_nonzero_coefs=0
)
assert_raises(ValueError, dico.fit, X)
dico = MiniBatchMultivariateDictLearning(
n_kernels=n_kernels, random_state=0, n_iter=2, n_nonzero_coefs=n_kernels + 1
)
assert_raises(ValueError, dico.fit, X)
def test_mdla_normalization():
n_samples, n_features, n_dims = 10, 5, 3
X = [rng_global.randn(n_features, n_dims) for i in range(n_samples)]
n_kernels = 8
dico = MultivariateDictLearning(
n_kernels=n_kernels, random_state=0, max_iter=2, verbose=1
).fit(X)
for k in dico.kernels_:
assert_almost_equal(np.linalg.norm(k, "fro"), 1.0)
dico = MiniBatchMultivariateDictLearning(
n_kernels=n_kernels, random_state=0, n_iter=2, verbose=1
).fit(X)
for k in dico.kernels_:
assert_almost_equal(np.linalg.norm(k, "fro"), 1.0)
def test_mdla_shapes():
n_samples, n_features, n_dims = 10, 5, 3
X = [rng_global.randn(n_features, n_dims) for i in range(n_samples)]
n_kernels = 8
dico = MultivariateDictLearning(
n_kernels=n_kernels, random_state=0, max_iter=10, verbose=5
).fit(X)
for i in range(n_kernels):
assert dico.kernels_[i].shape == (n_features, n_dims)
dico = MiniBatchMultivariateDictLearning(
n_kernels=n_kernels, random_state=0, verbose=5, n_iter=10
).fit(X)
for i in range(n_kernels):
assert dico.kernels_[i].shape == (n_features, n_dims)
def test_X_array():
n_samples, n_features, n_dims = 10, 5, 3
n_kernels = 8
X = rng_global.randn(n_samples, n_features, n_dims)
dico = MultivariateDictLearning(
n_kernels=n_kernels, random_state=0, max_iter=3, n_nonzero_coefs=3, verbose=5
)
code = dico.fit(X).transform(X[0])
assert len(code[0]) <= 3
dico = MiniBatchMultivariateDictLearning(
n_kernels=n_kernels, random_state=0, n_iter=3, n_nonzero_coefs=3, verbose=5
)
code = dico.fit(X).transform(X[0])
assert len(code[0]) <= 3
n_samples = len(X)
n_dims = X[0].shape[0] # 22 electrodes
n_features = X[0].shape[1] # 375, 3s of decimated signal at 125Hz
kernel_init_len = 80 # kernel size is 50
n_kernels = 60
n_nonzero_coefs = 2
learning_rate = 5.0
n_iter = 40 # 100
n_jobs, batch_size = -1, None # n_cpu, 5*n_cpu
figname = "-60ker-K3-klen80-lr5.0-emm-all"
d = MiniBatchMultivariateDictLearning(n_kernels=n_kernels,
batch_size=batch_size,
n_iter=n_iter,
n_nonzero_coefs=n_nonzero_coefs,
n_jobs=n_jobs,
learning_rate=learning_rate,
kernel_init_len=kernel_init_len,
verbose=1,
random_state=rng_global)
d = d.fit(X)
plot_objective_func(d.error_, n_iter, figname)
n_jobs = 4
plot_atom_usage(X, d.kernels_, n_nonzero_coefs, n_jobs, figname)
with open('EEG-savedico' + figname + '.pkl', 'wb') as f:
o = {
'kernels': d.kernels_,
'error': d.error_,
n_jobs, batch_size = -1, 10
detect_rate, wasserstein, objective_error = list(), list(), list()
generating_dict, X, code = _generate_testbed(kernel_init_len, n_nonzero_coefs,
n_kernels, n_samples, n_features,
n_dims)
# # Create a dictionary
# dict_init = [rand(kernel_init_len, n_dims) for i in range(n_kernels)]
# for i in range(len(dict_init)):
# dict_init[i] /= norm(dict_init[i], 'fro')
dict_init = None
learned_dict = MiniBatchMultivariateDictLearning(n_kernels=n_kernels,
batch_size=batch_size, n_iter=n_iter,
n_nonzero_coefs=n_nonzero_coefs,
n_jobs=n_jobs, learning_rate=learning_rate,
kernel_init_len=kernel_init_len, verbose=1,
dict_init=dict_init, random_state=rng_global)
# Update learned dictionary at each iteration and compute a distance
# with the generating dictionary
for i in range(max_iter):
learned_dict = learned_dict.partial_fit(X)
# Compute the detection rate
detect_rate.append(detection_rate(learned_dict.kernels_,
generating_dict, 0.99))
# Compute the Wasserstein distance
wasserstein.append(emd(learned_dict.kernels_, generating_dict,
'chordal', scale=True))
# Get the objective error
objective_error.append(learned_dict.error_.sum())
