def new_start(start_train_set, online_offset):
############################################################################
fashion_mnist = settings.fashion_mnist
svhn = settings.svhn
exponential_family = settings.exponential_family
classes = settings.classes
K = settings.K
structure = settings.structure
# 'poon-domingos'
pd_num_pieces = settings.pd_num_pieces
# 'binary-trees'
depth = settings.depth
num_repetitions = settings.num_repetitions_mixture
width = settings.width
height = settings.height
num_epochs = settings.num_epochs
batch_size = settings.batch_size
online_em_frequency = settings.online_em_frequency
online_em_stepsize = settings.online_em_stepsize
############################################################################
exponential_family_args = None
if exponential_family == EinsumNetwork.BinomialArray:
exponential_family_args = {'N': 255}
if exponential_family == EinsumNetwork.CategoricalArray:
exponential_family_args = {'K': 256}
if exponential_family == EinsumNetwork.NormalArray:
exponential_family_args = {'min_var': 1e-6, 'max_var': 0.1}
# get data
if fashion_mnist:
train_x, train_labels, test_x, test_labels = datasets.load_fashion_mnist()
elif svhn:
train_x, train_labels, test_x, test_labels, extra_x, extra_labels = datasets.load_svhn()
else:
train_x, train_labels, test_x, test_labels = datasets.load_mnist()
if not exponential_family != EinsumNetwork.NormalArray:
train_x /= 255.
test_x /= 255.
train_x -= .5
test_x -= .5
# validation split
valid_x = train_x[-10000:, :]
# online_x = train_x[-40000:, :]
train_x = train_x[:-(10000+online_offset-start_train_set), :]
valid_labels = train_labels[-10000:]
# online_labels = train_labels[-40000:]
train_labels = train_labels[:-(10000+online_offset-start_train_set)]
# # debug setup
# valid_x = train_x[-10000:, :]
# online_x = train_x[-45000:, :]
# train_x = train_x[:-55000, :]
# valid_labels = train_labels[-10000:]
# online_labels = train_labels[-45000:]
# train_labels = train_labels[:-55000]
# valid_x = train_x[-10000:, :]
# online_x = train_x[-10000:, :]
# train_x = train_x[:-20000, :]
# valid_labels = train_labels[-10000:]
# online_labels = train_labels[-10000:]
# train_labels = train_labels[:-20000]
# valid_x = train_x[-10000:, :]
# online_x = train_x[-20000:, :]
# train_x = train_x[:-30000, :]
# valid_labels = train_labels[-10000:]
# online_labels = train_labels[-20000:]
# train_labels = train_labels[:-30000]
# pick the selected classes
if classes is not None:
train_x = train_x[np.any(np.stack([train_labels == c for c in classes], 1), 1), :]
# online_x = online_x[np.any(np.stack([online_labels == c for c in classes], 1), 1), :]
valid_x = valid_x[np.any(np.stack([valid_labels == c for c in classes], 1), 1), :]
test_x = test_x[np.any(np.stack([test_labels == c for c in classes], 1), 1), :]
train_labels = [l for l in train_labels if l in classes]
# online_labels = [l for l in online_labels if l in classes]
valid_labels = [l for l in valid_labels if l in classes]
test_labels = [l for l in test_labels if l in classes]
else:
classes = np.unique(train_labels).tolist()
train_labels = [l for l in train_labels if l in classes]
# online_labels = [l for l in online_labels if l in classes]
valid_labels = [l for l in valid_labels if l in classes]
test_labels = [l for l in test_labels if l in classes]
train_x = torch.from_numpy(train_x).to(torch.device(device))
# online_x = torch.from_numpy(online_x).to(torch.device(device))
valid_x = torch.from_numpy(valid_x).to(torch.device(device))
test_x = torch.from_numpy(test_x).to(torch.device(device))
######################################
# Make EinsumNetworks for each class #
######################################
einets = []
ps = []
for c in classes:
if structure == 'poon-domingos':
pd_delta = [[height / d, width / d] for d in pd_num_pieces]
graph = Graph.poon_domingos_structure(shape=(height, width), delta=pd_delta)
elif structure == 'binary-trees':
graph = Graph.random_binary_trees(num_var=train_x.shape[1], depth=depth, num_repetitions=num_repetitions)
else:
raise AssertionError("Unknown Structure")
args = EinsumNetwork.Args(
num_var=train_x.shape[1],
num_dims=3 if svhn else 1,
num_classes=1,
num_sums=K,
num_input_distributions=K,
exponential_family=exponential_family,
exponential_family_args=exponential_family_args,
online_em_frequency=online_em_frequency,
online_em_stepsize=online_em_stepsize)
einet = EinsumNetwork.EinsumNetwork(graph, args)
init_dict = get_init_dict(einet, train_x, train_labels=train_labels, einet_class=c)
einet.initialize(init_dict)
einet.to(device)
einets.append(einet)
# Calculate amount of training samples per class
ps.append(train_labels.count(c))
print(f'Einsum network for class {c}:')
print(einet)
# normalize ps, construct mixture component
ps = [p / sum(ps) for p in ps]
ps = torch.tensor(ps).to(torch.device(device))
mixture = EinetMixture(ps, einets, classes=classes)
num_params = mixture.eval_size()
##################################
# Evalueate after initialization #
##################################
train_N = train_x.shape[0]
valid_N = valid_x.shape[0]
test_N = test_x.shape[0]
mixture.eval()
train_ll_before = mixture.eval_loglikelihood_batched(train_x, batch_size=batch_size)
valid_ll_before = mixture.eval_loglikelihood_batched(valid_x, batch_size=batch_size)
test_ll_before = mixture.eval_loglikelihood_batched(test_x, batch_size=batch_size)
print()
print("Experiment 3: Log-likelihoods --- train LL {} valid LL {} test LL {}".format(
train_ll_before / train_N,
valid_ll_before / valid_N,
test_ll_before / test_N))
train_lls.append(train_ll_before / train_N)
valid_lls.append(valid_ll_before / valid_N)
test_lls.append(test_ll_before / test_N)
################
# Experiment 4 #
################
train_labelsz = torch.tensor(train_labels).to(torch.device(device))
valid_labelsz = torch.tensor(valid_labels).to(torch.device(device))
test_labelsz = torch.tensor(test_labels).to(torch.device(device))
acc_train_before = mixture.eval_accuracy_batched(classes, train_x, train_labelsz, batch_size=batch_size)
acc_valid_before = mixture.eval_accuracy_batched(classes, valid_x, valid_labelsz, batch_size=batch_size)
acc_test_before = mixture.eval_accuracy_batched(classes, test_x, test_labelsz, batch_size=batch_size)
print()
print("Experiment 8: Classification accuracies --- train acc {} valid acc {} test acc {}".format(
acc_train_before,
acc_valid_before,
acc_test_before))
train_accs.append(acc_train_before)
valid_accs.append(acc_valid_before)
test_accs.append(acc_test_before)
def run_experiment(settings):
############################################################################
fashion_mnist = settings.fashion_mnist
svhn = settings.svhn
exponential_family = settings.exponential_family
classes = settings.classes
K = settings.K
structure = settings.structure
# 'poon-domingos'
pd_num_pieces = settings.pd_num_pieces
# 'binary-trees'
depth = settings.depth
num_repetitions = settings.num_repetitions_mixture
width = settings.width
height = settings.height
num_epochs = settings.num_epochs
batch_size = settings.batch_size
SGD_learning_rate = settings.SGD_learning_rate
############################################################################
exponential_family_args = None
if exponential_family == EinsumNetwork.BinomialArray:
exponential_family_args = {'N': 255}
if exponential_family == EinsumNetwork.CategoricalArray:
exponential_family_args = {'K': 256}
if exponential_family == EinsumNetwork.NormalArray:
exponential_family_args = {'min_var': 1e-6, 'max_var': 0.1}
# get data
if fashion_mnist:
train_x, train_labels, test_x, test_labels = datasets.load_fashion_mnist()
elif svhn:
train_x, train_labels, test_x, test_labels, extra_x, extra_labels = datasets.load_svhn()
else:
train_x, train_labels, test_x, test_labels = datasets.load_mnist()
if not exponential_family != EinsumNetwork.NormalArray:
train_x /= 255.
test_x /= 255.
train_x -= .5
test_x -= .5
# validation split
valid_x = train_x[-10000:, :]
train_x = train_x[:-10000, :]
valid_labels = train_labels[-10000:]
train_labels = train_labels[:-10000]
# pick the selected classes
if classes is not None:
train_x = train_x[np.any(np.stack([train_labels == c for c in classes], 1), 1), :]
valid_x = valid_x[np.any(np.stack([valid_labels == c for c in classes], 1), 1), :]
test_x = test_x[np.any(np.stack([test_labels == c for c in classes], 1), 1), :]
train_labels = [l for l in train_labels if l in classes]
valid_labels = [l for l in valid_labels if l in classes]
test_labels = [l for l in test_labels if l in classes]
else:
classes = np.unique(train_labels).tolist()
train_labels = [l for l in train_labels if l in classes]
valid_labels = [l for l in valid_labels if l in classes]
test_labels = [l for l in test_labels if l in classes]
train_x = torch.from_numpy(train_x).to(torch.device(device))
valid_x = torch.from_numpy(valid_x).to(torch.device(device))
test_x = torch.from_numpy(test_x).to(torch.device(device))
######################################
# Make EinsumNetworks for each class #
######################################
einets = []
ps = []
for c in classes:
if structure == 'poon-domingos':
pd_delta = [[height / d, width / d] for d in pd_num_pieces]
graph = Graph.poon_domingos_structure(shape=(height, width), delta=pd_delta)
elif structure == 'binary-trees':
graph = Graph.random_binary_trees(num_var=train_x.shape[1], depth=depth, num_repetitions=num_repetitions)
else:
raise AssertionError("Unknown Structure")
args = EinsumNetwork.Args(
num_var=train_x.shape[1],
num_dims=3 if svhn else 1,
num_classes=1,
num_sums=K,
num_input_distributions=K,
exponential_family=exponential_family,
exponential_family_args=exponential_family_args,
use_em=False)
einet = EinsumNetwork.EinsumNetwork(graph, args)
init_dict = get_init_dict(einet, train_x, train_labels=train_labels, einet_class=c)
einet.initialize(init_dict)
einet.to(device)
einets.append(einet)
# Calculate amount of training samples per class
ps.append(train_labels.count(c))
print(f'Einsum network for class {c}:')
print(einet)
# normalize ps, construct mixture component
ps = [p / sum(ps) for p in ps]
ps = torch.tensor(ps).to(torch.device(device))
mixture = EinetMixture(ps, einets, classes=classes)
num_params = mixture.eval_size()
##################################
# Evalueate after initialization #
##################################
train_lls = []
valid_lls = []
test_lls = []
train_accs = []
valid_accs = []
test_accs = []
train_N = train_x.shape[0]
valid_N = valid_x.shape[0]
test_N = test_x.shape[0]
mixture.eval()
train_ll_before = mixture.eval_loglikelihood_batched(train_x, batch_size=batch_size, skip_reparam=True)
valid_ll_before = mixture.eval_loglikelihood_batched(valid_x, batch_size=batch_size, skip_reparam=True)
test_ll_before = mixture.eval_loglikelihood_batched(test_x, batch_size=batch_size, skip_reparam=True)
print()
print("Experiment 3: Log-likelihoods --- train LL {} valid LL {} test LL {}".format(
train_ll_before / train_N,
valid_ll_before / valid_N,
test_ll_before / test_N))
train_lls.append(train_ll_before / train_N)
valid_lls.append(valid_ll_before / valid_N)
test_lls.append(test_ll_before / test_N)
################
# Experiment 4 #
################
train_labelsz = torch.tensor(train_labels).to(torch.device(device))
valid_labelsz = torch.tensor(valid_labels).to(torch.device(device))
test_labelsz = torch.tensor(test_labels).to(torch.device(device))
acc_train_before = mixture.eval_accuracy_batched(classes, train_x, train_labelsz, batch_size=batch_size, skip_reparam=True)
acc_valid_before = mixture.eval_accuracy_batched(classes, valid_x, valid_labelsz, batch_size=batch_size, skip_reparam=True)
acc_test_before = mixture.eval_accuracy_batched(classes, test_x, test_labelsz, batch_size=batch_size, skip_reparam=True)
print()
print("Experiment 4: Classification accuracies --- train acc {} valid acc {} test acc {}".format(
acc_train_before,
acc_valid_before,
acc_test_before))
train_accs.append(acc_train_before)
valid_accs.append(acc_valid_before)
test_accs.append(acc_test_before)
mixture.train()
##################
# Training phase #
##################
""" Learning each sub Network Generatively """
sub_net_parameters = None
for einet in mixture.einets:
if sub_net_parameters is None:
sub_net_parameters = list(einet.parameters())
else:
sub_net_parameters += list(einet.parameters())
sub_net_parameters += list(mixture.parameters())
optimizer = torch.optim.SGD(sub_net_parameters, lr=SGD_learning_rate)
start_time = time.time()
end_time = time.time()
for epoch_count in range(num_epochs):
for (einet, c) in zip(einets, classes):
train_x_c = train_x[[l == c for l in train_labels]]
valid_x_c = valid_x[[l == c for l in valid_labels]]
test_x_c = test_x[[l == c for l in test_labels]]
train_N = train_x_c.shape[0]
valid_N = valid_x_c.shape[0]
test_N = test_x_c.shape[0]
idx_batches = torch.randperm(train_N, device=device).split(batch_size)
total_loss = 0.0
for idx in idx_batches:
batch_x = train_x_c[idx, :]
optimizer.zero_grad()
outputs = einet.forward(batch_x)
ll_sample = EinsumNetwork.log_likelihoods(outputs)
log_likelihood = ll_sample.sum()
nll = log_likelihood * -1
nll.backward()
optimizer.step()
total_loss += nll.detach().item()
print(f'[{epoch_count}] total loss: {total_loss}')
mixture.eval()
train_N = train_x.shape[0]
valid_N = valid_x.shape[0]
test_N = test_x.shape[0]
train_ll = mixture.eval_loglikelihood_batched(train_x, batch_size=batch_size)
valid_ll = mixture.eval_loglikelihood_batched(valid_x, batch_size=batch_size)
test_ll = mixture.eval_loglikelihood_batched(test_x, batch_size=batch_size)
train_lls.append(train_ll / train_N)
valid_lls.append(valid_ll / valid_N)
test_lls.append(test_ll / test_N)
train_labelsz = torch.tensor(train_labels).to(torch.device(device))
valid_labelsz = torch.tensor(valid_labels).to(torch.device(device))
test_labelsz = torch.tensor(test_labels).to(torch.device(device))
acc_train = mixture.eval_accuracy_batched(classes, train_x, train_labelsz, batch_size=batch_size)
acc_valid = mixture.eval_accuracy_batched(classes, valid_x, valid_labelsz, batch_size=batch_size)
acc_test = mixture.eval_accuracy_batched(classes, test_x, test_labelsz, batch_size=batch_size)
train_accs.append(acc_train)
valid_accs.append(acc_valid)
test_accs.append(acc_test)
mixture.train()
print()
print("Experiment 3: Log-likelihoods --- train LL {} valid LL {} test LL {}".format(
train_ll / train_N,
valid_ll / valid_N,
test_ll / test_N))
print()
print("Experiment 4: Classification accuracies --- train acc {} valid acc {} test acc {}".format(
acc_train,
acc_valid,
acc_test))
print(f'Network size: {num_params} parameters')
print(f'Training time: {end_time - start_time}s')
return {
'train_lls': train_lls,
'valid_lls': valid_lls,
'test_lls': test_lls,
'train_accs': train_accs,
'valid_accs': valid_accs,
'test_accs': test_accs,
'network_size': num_params,
'training_time': end_time - start_time,
}
def run_experiment(settings):
############################################################################
fashion_mnist = settings.fashion_mnist
svhn = settings.svhn
exponential_family = settings.exponential_family
classes = settings.classes
K = settings.K
structure = settings.structure
# 'poon-domingos'
pd_num_pieces = settings.pd_num_pieces
# 'binary-trees'
depth = settings.depth
num_repetitions = settings.num_repetitions
width = settings.width
height = settings.height
num_epochs = settings.num_epochs
batch_size = settings.batch_size
online_em_frequency = settings.online_em_frequency
online_em_stepsize = settings.online_em_stepsize
SGD_learning_rate = settings.SGD_learning_rate
############################################################################
exponential_family_args = None
if exponential_family == EinsumNetwork.BinomialArray:
exponential_family_args = {'N': 255}
if exponential_family == EinsumNetwork.CategoricalArray:
exponential_family_args = {'K': 256}
if exponential_family == EinsumNetwork.NormalArray:
exponential_family_args = {'min_var': 1e-6, 'max_var': 0.1}
# get data
if fashion_mnist:
train_x, train_labels, test_x, test_labels = datasets.load_fashion_mnist(
)
elif svhn:
train_x, train_labels, test_x, test_labels, extra_x, extra_labels = datasets.load_svhn(
)
else:
train_x, train_labels, test_x, test_labels = datasets.load_mnist()
if not exponential_family != EinsumNetwork.NormalArray:
train_x /= 255.
test_x /= 255.
train_x -= .5
test_x -= .5
# validation split
valid_x = train_x[-10000:, :]
train_x = train_x[:-10000, :]
valid_labels = train_labels[-10000:]
train_labels = train_labels[:-10000]
# pick the selected classes
if classes is not None:
train_x = train_x[
np.any(np.stack([train_labels == c for c in classes], 1), 1), :]
valid_x = valid_x[
np.any(np.stack([valid_labels == c for c in classes], 1), 1), :]
test_x = test_x[
np.any(np.stack([test_labels == c for c in classes], 1), 1), :]
train_labels = [l for l in train_labels if l in classes]
valid_labels = [l for l in valid_labels if l in classes]
test_labels = [l for l in test_labels if l in classes]
else:
classes = np.unique(train_labels).tolist()
train_labels = [l for l in train_labels if l in classes]
valid_labels = [l for l in valid_labels if l in classes]
test_labels = [l for l in test_labels if l in classes]
train_x = torch.from_numpy(train_x).to(torch.device(device))
valid_x = torch.from_numpy(valid_x).to(torch.device(device))
test_x = torch.from_numpy(test_x).to(torch.device(device))
# Make EinsumNetwork
######################################
if structure == 'poon-domingos':
pd_delta = [[height / d, width / d] for d in pd_num_pieces]
graph = Graph.poon_domingos_structure(shape=(height, width),
delta=pd_delta)
elif structure == 'binary-trees':
graph = Graph.random_binary_trees(num_var=train_x.shape[1],
depth=depth,
num_repetitions=num_repetitions)
else:
raise AssertionError("Unknown Structure")
args = EinsumNetwork.Args(num_var=train_x.shape[1],
num_dims=3 if svhn else 1,
num_classes=1,
num_sums=K,
num_input_distributions=K,
exponential_family=exponential_family,
exponential_family_args=exponential_family_args,
online_em_frequency=online_em_frequency,
online_em_stepsize=online_em_stepsize,
use_em=True)
einet = EinsumNetwork.EinsumNetwork(graph, args)
print(einet)
init_dict = get_init_dict(einet, train_x)
einet.initialize(init_dict)
einet.to(device)
num_params = EinsumNetwork.eval_size(einet)
data_dir = '../src/experiments/round5/data/weights_analysis/'
data_file = os.path.join(data_dir, f"weights_before.json")
weights = einet.einet_layers[-1].params.data.cpu()
np.savetxt(data_file, weights[0])
# Train
######################################
optimizer = torch.optim.SGD(einet.parameters(), lr=SGD_learning_rate)
train_N = train_x.shape[0]
valid_N = valid_x.shape[0]
test_N = test_x.shape[0]
start_time = time.time()
for epoch_count in range(num_epochs):
idx_batches = torch.randperm(train_N, device=device).split(batch_size)
total_loss = 0.0
for idx in idx_batches:
batch_x = train_x[idx, :]
# optimizer.zero_grad()
outputs = einet.forward(batch_x)
ll_sample = EinsumNetwork.log_likelihoods(outputs)
log_likelihood = ll_sample.sum()
log_likelihood.backward()
# nll = log_likelihood * -1
# nll.backward()
# optimizer.step()
einet.em_process_batch()
einet.em_update()
print(f'[{epoch_count}] total loss: {total_loss}')
end_time = time.time()
data_dir = '../src/experiments/round5/data/weights_analysis/'
data_file = os.path.join(data_dir, f"weights_after.json")
weights = einet.einet_layers[-1].params.data.cpu()
np.savetxt(data_file, weights[0])
# exit()
################
# Experiment 1 #
################
einet.eval()
train_ll = EinsumNetwork.eval_loglikelihood_batched(einet,
train_x,
batch_size=batch_size)
valid_ll = EinsumNetwork.eval_loglikelihood_batched(einet,
valid_x,
batch_size=batch_size)
test_ll = EinsumNetwork.eval_loglikelihood_batched(einet,
test_x,
batch_size=batch_size)
print()
print(
"Experiment 1: Log-likelihoods --- train LL {} valid LL {} test LL {}"
.format(train_ll / train_N, valid_ll / valid_N, test_ll / test_N))
################
# Experiment 2 #
################
train_labels = torch.tensor(train_labels).to(torch.device(device))
valid_labels = torch.tensor(valid_labels).to(torch.device(device))
test_labels = torch.tensor(test_labels).to(torch.device(device))
acc_train = EinsumNetwork.eval_accuracy_batched(einet,
classes,
train_x,
train_labels,
batch_size=batch_size)
acc_valid = EinsumNetwork.eval_accuracy_batched(einet,
classes,
valid_x,
valid_labels,
batch_size=batch_size)
acc_test = EinsumNetwork.eval_accuracy_batched(einet,
classes,
test_x,
test_labels,
batch_size=batch_size)
print()
print(
"Experiment 2: Classification accuracies --- train acc {} valid acc {} test acc {}"
.format(acc_train, acc_valid, acc_test))
print()
print(f'Network size: {num_params} parameters')
print(f'Training time: {end_time - start_time}s')
return {
'train_ll': train_ll / train_N,
'valid_ll': valid_ll / valid_N,
'test_ll': test_ll / test_N,
'train_acc': acc_train,
'valid_acc': acc_valid,
'test_acc': acc_test,
'network_size': num_params,
'training_time': end_time - start_time,
}
def run_experiment(settings):
############################################################################
fashion_mnist = settings.fashion_mnist
svhn = settings.svhn
exponential_family = settings.exponential_family
classes = settings.classes
K = settings.K
structure = settings.structure
# 'poon-domingos'
pd_num_pieces = settings.pd_num_pieces
# 'binary-trees'
depth = settings.depth
num_repetitions_mixture = settings.num_repetitions_mixture
width = settings.width
height = settings.height
num_epochs = settings.num_epochs
batch_size = settings.batch_size
SGD_learning_rate = settings.SGD_learning_rate
############################################################################
exponential_family_args = None
if exponential_family == EinsumNetwork.BinomialArray:
exponential_family_args = {'N': 255}
if exponential_family == EinsumNetwork.CategoricalArray:
exponential_family_args = {'K': 256}
if exponential_family == EinsumNetwork.NormalArray:
exponential_family_args = {'min_var': 1e-6, 'max_var': 0.1}
# get data
if fashion_mnist:
train_x, train_labels, test_x, test_labels = datasets.load_fashion_mnist(
)
elif svhn:
train_x, train_labels, test_x, test_labels, extra_x, extra_labels = datasets.load_svhn(
)
else:
train_x, train_labels, test_x, test_labels = datasets.load_mnist()
if not exponential_family != EinsumNetwork.NormalArray:
train_x /= 255.
test_x /= 255.
train_x -= .5
test_x -= .5
# validation split
valid_x = train_x[-10000:, :]
online_x = train_x[-11000:-10000, :]
train_x = train_x[-56000:-11000, :]
# init_x = train_x[-13000:-10000, :]
valid_labels = train_labels[-10000:]
online_labels = train_labels[-11000:-10000]
train_labels = train_labels[-56000:-11000]
# init_labels = train_labels[-13000:-10000]
# full set of training
# valid_x = train_x[-10000:, :]
# online_x = train_x[-11000:-10000, :]
# train_x = train_x[:-10000, :]
# valid_labels = train_labels[-10000:]
# online_labels = train_labels[-11000:-10000]
# train_labels = train_labels[:-10000]
# print('train_x:')
# print(train_x.shape)
# print(train_labels.shape)
# print('online_x:')
# print(online_x.shape)
# print(online_labels.shape)
# exit()
# pick the selected classes
if classes is not None:
train_x = train_x[
np.any(np.stack([train_labels == c for c in classes], 1), 1), :]
online_x = online_x[
np.any(np.stack([online_labels == c for c in classes], 1), 1), :]
# init_x = init_x[np.any(np.stack([init_labels == c for c in classes], 1), 1), :]
valid_x = valid_x[
np.any(np.stack([valid_labels == c for c in classes], 1), 1), :]
test_x = test_x[
np.any(np.stack([test_labels == c for c in classes], 1), 1), :]
train_labels = [l for l in train_labels if l in classes]
train_labels_backup = train_labels
online_labels = [l for l in online_labels if l in classes]
# init_labels = [l for l in init_labels if l in classes]
valid_labels = [l for l in valid_labels if l in classes]
test_labels = [l for l in test_labels if l in classes]
else:
classes = np.unique(train_labels).tolist()
train_labels = [l for l in train_labels if l in classes]
train_labels_backup = train_labels
online_labels = [l for l in online_labels if l in classes]
# init_labels = [l for l in init_labels if l in classes]
valid_labels = [l for l in valid_labels if l in classes]
test_labels = [l for l in test_labels if l in classes]
train_x = torch.from_numpy(train_x).to(torch.device(device))
train_x_backup = train_x
online_x = torch.from_numpy(online_x).to(torch.device(device))
# init_x = torch.from_numpy(init_x).to(torch.device(device))
valid_x = torch.from_numpy(valid_x).to(torch.device(device))
test_x = torch.from_numpy(test_x).to(torch.device(device))
######################################
# Make EinsumNetworks for each class #
######################################
einets = []
ps = []
for c in classes:
if structure == 'poon-domingos':
pd_delta = [[height / d, width / d] for d in pd_num_pieces]
graph = Graph.poon_domingos_structure(shape=(height, width),
delta=pd_delta)
elif structure == 'binary-trees':
graph = Graph.random_binary_trees(
num_var=train_x.shape[1],
depth=depth,
num_repetitions=num_repetitions_mixture)
else:
raise AssertionError("Unknown Structure")
args = EinsumNetwork.Args(
num_var=train_x.shape[1],
num_dims=3 if svhn else 1,
num_classes=1,
num_sums=K,
num_input_distributions=K,
exponential_family=exponential_family,
exponential_family_args=exponential_family_args,
use_em=False)
einet = EinsumNetwork.EinsumNetwork(graph, args)
# init_dict = get_init_dict(einet, init_x, train_labels=init_labels, einet_class=c)
init_dict = get_init_dict(einet,
train_x,
train_labels=train_labels,
einet_class=c)
einet.initialize(init_dict)
einet.to(device)
einets.append(einet)
# Calculate amount of training samples per class
ps.append(train_labels.count(c))
print(f'Einsum network for class {c}:')
print(einet)
# normalize ps, construct mixture component
ps = [p / sum(ps) for p in ps]
ps = torch.tensor(ps).to(torch.device(device))
mixture = EinetMixture(ps, einets, classes=classes)
num_params = mixture.eval_size()
# data_dir = '../src/experiments/round5/data/weights_analysis/'
# utils.mkdir_p(data_dir)
# for (einet, c) in zip(einets, classes):
# data_file = os.path.join(data_dir, f"weights_before_{c}.json")
# weights = einet.einet_layers[-1].params.data.cpu()
# np.savetxt(data_file, einet.einet_layers[-1].reparam(weights)[0])
##################
# Training phase #
##################
sub_net_parameters = None
for einet in mixture.einets:
if sub_net_parameters is None:
sub_net_parameters = list(einet.parameters())
else:
sub_net_parameters += list(einet.parameters())
sub_net_parameters += list(mixture.parameters())
optimizer = torch.optim.SGD(sub_net_parameters, lr=SGD_learning_rate)
start_time = time.time()
""" Learning each sub Network Generatively """
for (einet, c) in zip(einets, classes):
train_x_c = train_x[[l == c for l in train_labels]]
train_N = train_x_c.shape[0]
for epoch_count in range(num_epochs):
idx_batches = torch.randperm(train_N,
device=device).split(batch_size)
total_loss = 0.0
for idx in idx_batches:
batch_x = train_x_c[idx, :]
optimizer.zero_grad()
outputs = einet.forward(batch_x)
ll_sample = EinsumNetwork.log_likelihoods(outputs)
log_likelihood = ll_sample.sum()
nll = log_likelihood * -1
nll.backward()
optimizer.step()
total_loss += nll.detach().item()
print(f'[{epoch_count}] total log-likelihood: {total_loss}')
# data_dir = '../src/experiments/round5/data/weights_analysis/'
# utils.mkdir_p(data_dir)
# for (einet, c) in zip(einets, classes):
# data_file = os.path.join(data_dir, f"weights_after_{c}.json")
# weights = einet.einet_layers[-1].params.data.cpu()
# np.savetxt(data_file, einet.einet_layers[-1].reparam(weights)[0])
# exit()
##################################
# Evalueate after initialization #
##################################
train_lls = []
valid_lls = []
test_lls = []
train_accs = []
valid_accs = []
test_accs = []
train_lls_ref = []
valid_lls_ref = []
test_lls_ref = []
train_accs_ref = []
valid_accs_ref = []
test_accs_ref = []
added_samples = [0]
def eval_network(do_print=False, no_OA=False):
if no_OA:
train_N = train_x_backup.shape[0]
else:
train_N = train_x.shape[0]
valid_N = valid_x.shape[0]
test_N = test_x.shape[0]
mixture.eval()
if no_OA:
train_ll_before = mixture.eval_loglikelihood_batched(
train_x_backup, batch_size=batch_size)
else:
train_ll_before = mixture.eval_loglikelihood_batched(
train_x, batch_size=batch_size)
valid_ll_before = mixture.eval_loglikelihood_batched(
valid_x, batch_size=batch_size)
test_ll_before = mixture.eval_loglikelihood_batched(
test_x, batch_size=batch_size)
if do_print:
print()
print(
"Experiment 3: Log-likelihoods --- train LL {} valid LL {} test LL {}"
.format(train_ll_before / train_N, valid_ll_before / valid_N,
test_ll_before / test_N))
if no_OA:
train_lls_ref.append(train_ll_before / train_N)
valid_lls_ref.append(valid_ll_before / valid_N)
test_lls_ref.append(test_ll_before / test_N)
else:
train_lls.append(train_ll_before / train_N)
valid_lls.append(valid_ll_before / valid_N)
test_lls.append(test_ll_before / test_N)
################
# Experiment 4 #
################
if no_OA:
train_labelsz = torch.tensor(train_labels_backup).to(
torch.device(device))
else:
train_labelsz = torch.tensor(train_labels).to(torch.device(device))
valid_labelsz = torch.tensor(valid_labels).to(torch.device(device))
test_labelsz = torch.tensor(test_labels).to(torch.device(device))
if no_OA:
acc_train_before = mixture.eval_accuracy_batched(
classes, train_x_backup, train_labelsz, batch_size=batch_size)
else:
acc_train_before = mixture.eval_accuracy_batched(
classes, train_x, train_labelsz, batch_size=batch_size)
acc_valid_before = mixture.eval_accuracy_batched(classes,
valid_x,
valid_labelsz,
batch_size=batch_size)
acc_test_before = mixture.eval_accuracy_batched(classes,
test_x,
test_labelsz,
batch_size=batch_size)
if do_print:
print()
print(
"Experiment 4: Classification accuracies --- train acc {} valid acc {} test acc {}"
.format(acc_train_before, acc_valid_before, acc_test_before))
if no_OA:
train_accs_ref.append(acc_train_before)
valid_accs_ref.append(acc_valid_before)
test_accs_ref.append(acc_test_before)
else:
train_accs.append(acc_train_before)
valid_accs.append(acc_valid_before)
test_accs.append(acc_test_before)
mixture.train()
eval_network(do_print=True, no_OA=False)
eval_network(do_print=False, no_OA=True)
#####################################################
# Evaluate the network with different training sets #
#####################################################
idx_batches = torch.randperm(online_x.shape[0], device=device).split(20)
for idx in tqdm(idx_batches):
online_x_idx = online_x[idx]
online_labels_idx = [online_labels[i] for i in idx]
for (einet, c) in zip(einets, classes):
batch_x = online_x_idx[[l == c for l in online_labels_idx]]
train_x_backup = torch.cat((train_x_backup, batch_x))
train_labels_backup += [c for i in batch_x]
added_samples.append(added_samples[-1] + len(idx))
eval_network(do_print=False, no_OA=True)
#####################
# Online adaptation #
#####################
for idx in tqdm(idx_batches):
online_x_idx = online_x[idx]
online_labels_idx = [online_labels[i] for i in idx]
for (einet, c) in zip(einets, classes):
batch_x = online_x_idx[[l == c for l in online_labels_idx]]
online_update(einet, batch_x)
train_x = torch.cat((train_x, batch_x))
train_labels += [c for i in batch_x]
eval_network(do_print=False, no_OA=False)
print()
print(f'Network size: {num_params} parameters')
return {
'train_lls': train_lls,
'valid_lls': valid_lls,
'test_lls': test_lls,
'train_accs': train_accs,
'valid_accs': valid_accs,
'test_accs': test_accs,
'train_lls_ref': train_lls_ref,
'valid_lls_ref': valid_lls_ref,
'test_lls_ref': test_lls_ref,
'train_accs_ref': train_accs_ref,
'valid_accs_ref': valid_accs_ref,
'test_accs_ref': test_accs_ref,
'network_size': num_params,
'online_samples': added_samples,
}
def run_experiment(settings):
############################################################################
fashion_mnist = settings.fashion_mnist
svhn = settings.svhn
exponential_family = settings.exponential_family
classes = settings.classes
K = settings.K
structure = settings.structure
# 'poon-domingos'
pd_num_pieces = settings.pd_num_pieces
# 'binary-trees'
depth = settings.depth
num_repetitions = settings.num_repetitions
width = settings.width
height = settings.height
num_epochs = settings.num_epochs
batch_size = settings.batch_size
SGD_learning_rate = settings.SGD_learning_rate
############################################################################
exponential_family_args = None
if exponential_family == EinsumNetwork.BinomialArray:
exponential_family_args = {'N': 255}
if exponential_family == EinsumNetwork.CategoricalArray:
exponential_family_args = {'K': 256}
if exponential_family == EinsumNetwork.NormalArray:
exponential_family_args = {'min_var': 1e-6, 'max_var': 0.1}
# get data
if fashion_mnist:
train_x, train_labels, test_x, test_labels = datasets.load_fashion_mnist(
)
elif svhn:
train_x, train_labels, test_x, test_labels, extra_x, extra_labels = datasets.load_svhn(
)
else:
train_x, train_labels, test_x, test_labels = datasets.load_mnist()
if not exponential_family != EinsumNetwork.NormalArray:
train_x /= 255.
test_x /= 255.
train_x -= .5
test_x -= .5
# validation split
valid_x = train_x[-10000:, :]
train_x = train_x[:-10000, :]
valid_labels = train_labels[-10000:]
train_labels = train_labels[:-10000]
# pick the selected classes
if classes is not None:
train_x = train_x[
np.any(np.stack([train_labels == c for c in classes], 1), 1), :]
valid_x = valid_x[
np.any(np.stack([valid_labels == c for c in classes], 1), 1), :]
test_x = test_x[
np.any(np.stack([test_labels == c for c in classes], 1), 1), :]
train_labels = [l for l in train_labels if l in classes]
valid_labels = [l for l in valid_labels if l in classes]
test_labels = [l for l in test_labels if l in classes]
else:
classes = np.unique(train_labels).tolist()
train_labels = [l for l in train_labels if l in classes]
valid_labels = [l for l in valid_labels if l in classes]
test_labels = [l for l in test_labels if l in classes]
train_x = torch.from_numpy(train_x).to(torch.device(device))
valid_x = torch.from_numpy(valid_x).to(torch.device(device))
test_x = torch.from_numpy(test_x).to(torch.device(device))
######################################
# Make EinsumNetworks for each class #
######################################
if structure == 'poon-domingos':
pd_delta = [[height / d, width / d] for d in pd_num_pieces]
graph = Graph.poon_domingos_structure(shape=(height, width),
delta=pd_delta)
elif structure == 'binary-trees':
graph = Graph.random_binary_trees(num_var=train_x.shape[1],
depth=depth,
num_repetitions=num_repetitions)
else:
raise AssertionError("Unknown Structure")
args = EinsumNetwork.Args(num_var=train_x.shape[1],
num_dims=3 if svhn else 1,
num_classes=len(classes),
num_sums=K,
num_input_distributions=K,
exponential_family=exponential_family,
exponential_family_args=exponential_family_args,
use_em=False)
einet = EinsumNetwork.EinsumNetwork(graph, args)
init_dict = get_init_dict(einet, train_x)
einet.initialize(init_dict)
einet.to(device)
print(einet)
num_params = EinsumNetwork.eval_size(einet)
#################################
# Discriminative training phase #
#################################
optimizer = torch.optim.SGD(einet.parameters(), lr=SGD_learning_rate)
loss_function = torch.nn.CrossEntropyLoss()
train_N = train_x.shape[0]
valid_N = valid_x.shape[0]
test_N = test_x.shape[0]
start_time = time.time()
for epoch_count in range(num_epochs):
idx_batches = torch.randperm(train_N, device=device).split(batch_size)
total_loss = 0
for idx in idx_batches:
batch_x = train_x[idx, :]
optimizer.zero_grad()
outputs = einet.forward(batch_x)
target = torch.tensor([
classes.index(train_labels[i]) for i in idx
]).to(torch.device(device))
loss = loss_function(outputs, target)
loss.backward()
optimizer.step()
total_loss += loss.detach().item()
print(f'[{epoch_count}] total loss: {total_loss}')
end_time = time.time()
################
# Experiment 5 #
################
einet.eval()
train_ll = EinsumNetwork.eval_loglikelihood_batched(einet,
train_x,
batch_size=batch_size)
valid_ll = EinsumNetwork.eval_loglikelihood_batched(einet,
valid_x,
batch_size=batch_size)
test_ll = EinsumNetwork.eval_loglikelihood_batched(einet,
test_x,
batch_size=batch_size)
print()
print(
"Experiment 5: Log-likelihoods --- train LL {} valid LL {} test LL {}"
.format(train_ll / train_N, valid_ll / valid_N, test_ll / test_N))
################
# Experiment 6 #
################
train_labels = torch.tensor(train_labels).to(torch.device(device))
valid_labels = torch.tensor(valid_labels).to(torch.device(device))
test_labels = torch.tensor(test_labels).to(torch.device(device))
acc_train = EinsumNetwork.eval_accuracy_batched(einet,
classes,
train_x,
train_labels,
batch_size=batch_size)
acc_valid = EinsumNetwork.eval_accuracy_batched(einet,
classes,
valid_x,
valid_labels,
batch_size=batch_size)
acc_test = EinsumNetwork.eval_accuracy_batched(einet,
classes,
test_x,
test_labels,
batch_size=batch_size)
print()
print(
"Experiment 6: Classification accuracies --- train acc {} valid acc {} test acc {}"
.format(acc_train, acc_valid, acc_test))
print()
print(f'Network size: {num_params} parameters')
print(f'Training time: {end_time - start_time}s')
return {
'train_ll': train_ll / train_N,
'valid_ll': valid_ll / valid_N,
'test_ll': test_ll / test_N,
'train_acc': acc_train,
'valid_acc': acc_valid,
'test_acc': acc_test,
'network_size': num_params,
'training_time': end_time - start_time,
}
def run_experiment(settings):
############################################################################
exponential_family = EinsumNetwork.BinomialArray
K = 2
# structure = 'poon-domingos'
structure = 'binary-trees'
# 'poon-domingos'
pd_num_pieces = [2]
# 'binary-trees'
depth = 1
num_repetitions = 2
width = 4
num_epochs = 2
batch_size = 3
online_em_frequency = 1
online_em_stepsize = 0.05
print_weights = False
print_weights = True
############################################################################
exponential_family_args = None
if exponential_family == EinsumNetwork.BinomialArray:
exponential_family_args = {'N': 80}
if exponential_family == EinsumNetwork.CategoricalArray:
exponential_family_args = {'K': 256}
if exponential_family == EinsumNetwork.NormalArray:
exponential_family_args = {'min_var': 1e-6, 'max_var': 0.1}
iris = datasets.load_iris()
train_x = iris.data * 10
train_labels = iris.target
# self generated data
# train_x = np.array([np.array([1, 1, 1, 1]) for i in range(50)] + [np.array([3, 3, 3, 3]) for i in range(50)] + [np.array([8, 8, 8, 8]) for i in range(50)])
# train_labels = [0 for i in range(50)] + [1 for i in range(50)] + [2 for i in range(50)]
if not exponential_family != EinsumNetwork.NormalArray:
train_x /= 255.
train_x -= .5
classes = np.unique(train_labels).tolist()
train_x = torch.from_numpy(train_x).to(torch.device(device))
# Make EinsumNetwork
######################################
if structure == 'poon-domingos':
pd_delta = [[width / d] for d in pd_num_pieces]
graph = Graph.poon_domingos_structure(shape=(width), delta=pd_delta)
elif structure == 'binary-trees':
graph = Graph.random_binary_trees(num_var=train_x.shape[1], depth=depth, num_repetitions=num_repetitions)
else:
raise AssertionError("Unknown Structure")
args = EinsumNetwork.Args(
num_var=train_x.shape[1],
num_dims=1,
num_classes=1,
num_sums=K,
num_input_distributions=K,
exponential_family=exponential_family,
exponential_family_args=exponential_family_args,
online_em_frequency=online_em_frequency,
online_em_stepsize=online_em_stepsize)
einet = EinsumNetwork.EinsumNetwork(graph, args)
print(einet)
init_dict = get_init_dict(einet, train_x)
einet.initialize(init_dict)
einet.to(device)
einet = einet.float()
num_params = EinsumNetwork.eval_size(einet)
# Train
######################################
train_N = train_x.shape[0]
start_time = time.time()
for epoch_count in range(num_epochs):
idx_batches = torch.randperm(train_N, device=device).split(batch_size)
total_ll = 0.0
for idx in idx_batches:
batch_x = train_x[idx, :].float()
# exit()
outputs = einet.forward(batch_x)
ll_sample = EinsumNetwork.log_likelihoods(outputs)
log_likelihood = ll_sample.sum()
log_likelihood.backward()
einet.em_process_batch()
total_ll += log_likelihood.detach().item()
einet.em_update()
print(f'[{epoch_count}] total log-likelihood: {total_ll/train_N}')
end_time = time.time()
################
# Experiment 1 #
################
einet.eval()
train_ll = EinsumNetwork.eval_loglikelihood_batched(einet, train_x.float(), batch_size=batch_size)
print()
print("Experiment 1: Log-likelihoods --- train LL {}".format(
train_ll / train_N))
################
# Experiment 2 #
################
train_labels = torch.tensor(train_labels).to(torch.device(device))
acc_train = EinsumNetwork.eval_accuracy_batched(einet, classes, train_x.float(), train_labels, batch_size=batch_size)
print()
print("Experiment 2: Classification accuracies --- train acc {}".format(
acc_train))
print()
print(f'Network size: {num_params} parameters')
print(f'Training time: {end_time - start_time}s')
if print_weights:
for l in einet.einet_layers:
print()
if isinstance(l, FactorizedLeafLayer.FactorizedLeafLayer):
print(l.ef_array.params)
else:
print(l.params)
return {
'train_ll': train_ll / train_N,
'train_acc': acc_train,
'network_size': num_params,
'training_time': end_time - start_time,
}
def construct_network_and_train(
num_starts, svhn, exponential_family, classes, K, structure,
pd_num_pieces, depth, num_repetitions, width, height, num_epochs,
batch_size, online_em_frequency, online_em_stepsize,
exponential_family_args, train_x, train_labels, test_x,
test_labels, valid_x, valid_labels):
train_lls = []
valid_lls = []
test_lls = []
train_accs = []
valid_accs = []
test_accs = []
training_times = []
num_params = None
for s in range(num_starts):
print(f"""
Running start: {s}/{num_starts}
""")
# train_lls.append(0)
# valid_lls.append(0)
# test_lls.append(0)
# train_accs.append(0)
# valid_accs.append(0)
# test_accs.append(0)
# training_times.append(0)
# continue
######################################
# Make EinsumNetworks for each class #
######################################
einets = []
ps = []
for c in classes:
if structure == 'poon-domingos':
pd_delta = [[height / d, width / d] for d in pd_num_pieces]
graph = Graph.poon_domingos_structure(shape=(height,
width),
delta=pd_delta)
elif structure == 'binary-trees':
graph = Graph.random_binary_trees(
num_var=train_x.shape[1],
depth=depth,
num_repetitions=num_repetitions)
else:
raise AssertionError("Unknown Structure")
args = EinsumNetwork.Args(
num_var=train_x.shape[1],
num_dims=3 if svhn else 1,
num_classes=1,
num_sums=K,
num_input_distributions=K,
exponential_family=exponential_family,
exponential_family_args=exponential_family_args,
online_em_frequency=online_em_frequency,
online_em_stepsize=online_em_stepsize)
einet = EinsumNetwork.EinsumNetwork(graph, args)
init_dict = get_init_dict(einet,
train_x,
train_labels=train_labels,
einet_class=c)
einet.initialize(init_dict)
einet.to(device)
einets.append(einet)
# Calculate amount of training samples per class
ps.append(train_labels.count(c))
# print(f'Einsum network for class {c}:')
# print(einet)
# normalize ps, construct mixture component
ps = [p / sum(ps) for p in ps]
ps = torch.tensor(ps).to(torch.device(device))
mixture = EinetMixture(ps, einets, classes=classes)
if num_params == None:
num_params = mixture.eval_size()
##################
# Training phase #
##################
""" Learning each sub Network Generatively """
start_time = time.time()
for (einet, c) in zip(einets, classes):
train_x_c = train_x[[l == c for l in train_labels]]
valid_x_c = valid_x[[l == c for l in valid_labels]]
test_x_c = test_x[[l == c for l in test_labels]]
train_N = train_x_c.shape[0]
valid_N = valid_x_c.shape[0]
test_N = test_x_c.shape[0]
for epoch_count in range(num_epochs):
idx_batches = torch.randperm(
train_N, device=device).split(batch_size)
total_ll = 0.0
for idx in idx_batches:
batch_x = train_x_c[idx, :]
outputs = einet.forward(batch_x)
ll_sample = EinsumNetwork.log_likelihoods(outputs)
log_likelihood = ll_sample.sum()
log_likelihood.backward()
einet.em_process_batch()
total_ll += log_likelihood.detach().item()
einet.em_update()
print(
f'[{epoch_count}] total log-likelihood: {total_ll}')
end_time = time.time()
################
# Experiment 3 #
################
train_N = train_x.shape[0]
valid_N = valid_x.shape[0]
test_N = test_x.shape[0]
mixture.eval()
train_ll = mixture.eval_loglikelihood_batched(
train_x, batch_size=batch_size)
valid_ll = mixture.eval_loglikelihood_batched(
valid_x, batch_size=batch_size)
test_ll = mixture.eval_loglikelihood_batched(test_x,
batch_size=batch_size)
print()
print(
"Experiment 3: Log-likelihoods --- train LL {} valid LL {} test LL {}"
.format(train_ll / train_N, valid_ll / valid_N,
test_ll / test_N))
################
# Experiment 4 #
################
train_labels_tensor = torch.tensor(train_labels).to(
torch.device(device))
valid_labels_tensor = torch.tensor(valid_labels).to(
torch.device(device))
test_labels_tensor = torch.tensor(test_labels).to(
torch.device(device))
acc_train = mixture.eval_accuracy_batched(classes,
train_x,
train_labels_tensor,
batch_size=batch_size)
acc_valid = mixture.eval_accuracy_batched(classes,
valid_x,
valid_labels_tensor,
batch_size=batch_size)
acc_test = mixture.eval_accuracy_batched(classes,
test_x,
test_labels_tensor,
batch_size=batch_size)
print()
print(
"Experiment 4: Classification accuracies --- train acc {} valid acc {} test acc {}"
.format(acc_train, acc_valid, acc_test))
print()
print(f'Network size: {num_params} parameters')
print(f'Training time: {end_time - start_time}s')
train_lls.append(train_ll / train_N)
valid_lls.append(valid_ll / valid_N)
test_lls.append(test_ll / test_N)
train_accs.append(acc_train)
valid_accs.append(acc_valid)
test_accs.append(acc_test)
training_times.append(end_time - start_time)
return {
'train_ll': train_lls,
'valid_ll': valid_lls,
'test_ll': test_lls,
'train_acc': train_accs,
'valid_acc': valid_accs,
'test_acc': test_accs,
'network_size': num_params,
'training_time': training_times,
}
def run_experiment(settings):
############################################################################
exponential_family = EinsumNetwork.BinomialArray
K = 1
# structure = 'poon-domingos'
structure = 'binary-trees'
# 'poon-domingos'
pd_num_pieces = [2]
# 'binary-trees'
depth = 1
num_repetitions = 2
width = 4
num_epochs = 2
batch_size = 3
online_em_frequency = 1
online_em_stepsize = 0.05
SGD_learning_rate = 0.05
############################################################################
exponential_family_args = None
if exponential_family == EinsumNetwork.BinomialArray:
exponential_family_args = {'N': 80}
if exponential_family == EinsumNetwork.CategoricalArray:
exponential_family_args = {'K': 256}
if exponential_family == EinsumNetwork.NormalArray:
exponential_family_args = {'min_var': 1e-6, 'max_var': 0.1}
iris = datasets.load_iris()
train_x = iris.data * 10
train_labels = iris.target
# print(train_x[0])
# print(train_labels[0])
# exit()
# self generated data
# train_x = np.array([np.array([1, 1, 1, 1]) for i in range(50)] + [np.array([3, 3, 3, 3]) for i in range(50)] + [np.array([8, 8, 8, 8]) for i in range(50)])
# train_labels = np.array([0 for i in range(50)] + [1 for i in range(50)] + [2 for i in range(50)])
if not exponential_family != EinsumNetwork.NormalArray:
train_x /= 255.
train_x -= .5
classes = np.unique(train_labels).tolist()
train_x = torch.from_numpy(train_x).to(torch.device(device))
# Make EinsumNetwork
######################################
einets = []
ps = []
for c in classes:
if structure == 'poon-domingos':
pd_delta = [[width / d] for d in pd_num_pieces]
graph = Graph.poon_domingos_structure(shape=(width),
delta=pd_delta)
elif structure == 'binary-trees':
graph = Graph.random_binary_trees(num_var=train_x.shape[1],
depth=depth,
num_repetitions=num_repetitions)
else:
raise AssertionError("Unknown Structure")
args = EinsumNetwork.Args(
num_var=train_x.shape[1],
num_dims=1,
num_classes=1,
num_sums=K,
num_input_distributions=K,
exponential_family=exponential_family,
exponential_family_args=exponential_family_args,
online_em_frequency=online_em_frequency,
online_em_stepsize=online_em_stepsize)
einet = EinsumNetwork.EinsumNetwork(graph, args)
print(einet)
init_dict = get_init_dict(einet,
train_x,
train_labels=train_labels,
einet_class=c)
einet.initialize(init_dict)
einet.to(device)
einet = einet.float()
einets.append(einet)
ps.append(np.count_nonzero(train_labels == c))
ps = [p / sum(ps) for p in ps]
ps = torch.tensor(ps).to(torch.device(device))
mixture = EinetMixture(ps, einets, classes=classes)
num_params = mixture.eval_size()
# Train
######################################
""" Generative training """
start_time = time.time()
for (einet, c) in zip(einets, classes):
train_x_c = train_x[[l == c for l in train_labels]]
train_N = train_x_c.shape[0]
for epoch_count in range(num_epochs):
idx_batches = torch.randperm(train_N,
device=device).split(batch_size)
total_ll = 0.0
for idx in idx_batches:
batch_x = train_x_c[idx, :].float()
outputs = einet.forward(batch_x)
ll_sample = EinsumNetwork.log_likelihoods(outputs)
log_likelihood = ll_sample.sum()
log_likelihood.backward()
einet.em_process_batch()
total_ll += log_likelihood.detach().item()
einet.em_update()
print(
f'[{epoch_count}] total log-likelihood: {total_ll/train_N}')
end_time = time.time()
""" Discriminative training """
def discriminative_learning():
sub_net_parameters = None
for einet in mixture.einets:
if sub_net_parameters is None:
sub_net_parameters = list(einet.parameters())
else:
sub_net_parameters += list(einet.parameters())
sub_net_parameters += list(mixture.parameters())
optimizer = torch.optim.SGD(sub_net_parameters, lr=SGD_learning_rate)
loss_function = torch.nn.CrossEntropyLoss()
train_N = train_x.shape[0]
start_time = time.time()
for epoch_count in range(num_epochs):
idx_batches = torch.randperm(train_N,
device=device).split(batch_size)
total_loss = 0
for idx in idx_batches:
batch_x = train_x[idx, :].float()
optimizer.zero_grad()
outputs = mixture.forward(batch_x)
target = torch.tensor([
classes.index(train_labels[i]) for i in idx
]).to(torch.device(device))
loss = loss_function(outputs, target)
loss.backward()
optimizer.step()
total_loss += loss.detach().item()
print(f'[{epoch_count}] total loss: {total_loss}')
end_time = time.time()
################
# Experiment 1 #
################
mixture.eval()
train_ll = EinsumNetwork.eval_loglikelihood_batched(mixture,
train_x.float(),
batch_size=1)
print()
print("Experiment 1: Log-likelihoods --- train LL {}".format(train_ll /
train_N))
################
# Experiment 2 #
################
train_labels = torch.tensor(train_labels).to(torch.device(device))
acc_train = EinsumNetwork.eval_accuracy_batched(mixture,
classes,
train_x.float(),
train_labels,
batch_size=1)
print()
print("Experiment 2: Classification accuracies --- train acc {}".format(
acc_train))
print()
print(f'Network size: {num_params} parameters')
print(f'Training time: {end_time - start_time}s')
return {
'train_ll': train_ll / train_N,
'train_acc': acc_train,
'network_size': num_params,
'training_time': end_time - start_time,
}
def run_experiment(settings):
############################################################################
fashion_mnist = settings.fashion_mnist
svhn = settings.svhn
exponential_family = settings.exponential_family
classes = settings.classes
K = settings.K
structure = settings.structure
# 'poon-domingos'
pd_num_pieces = settings.pd_num_pieces
# 'binary-trees'
depth = settings.depth
num_repetitions_mixture = settings.num_repetitions_mixture
width = settings.width
height = settings.height
num_epochs = settings.num_epochs
batch_size = settings.batch_size
online_em_frequency = settings.online_em_frequency
online_em_stepsize = settings.online_em_stepsize
SGD_learning_rate = settings.SGD_learning_rate
############################################################################
exponential_family_args = None
if exponential_family == EinsumNetwork.BinomialArray:
exponential_family_args = {'N': 255}
if exponential_family == EinsumNetwork.CategoricalArray:
exponential_family_args = {'K': 256}
if exponential_family == EinsumNetwork.NormalArray:
exponential_family_args = {'min_var': 1e-6, 'max_var': 0.1}
# get data
if fashion_mnist:
train_x, train_labels, test_x, test_labels = datasets.load_fashion_mnist(
)
elif svhn:
train_x, train_labels, test_x, test_labels, extra_x, extra_labels = datasets.load_svhn(
)
else:
train_x, train_labels, test_x, test_labels = datasets.load_mnist()
if not exponential_family != EinsumNetwork.NormalArray:
train_x /= 255.
test_x /= 255.
train_x -= .5
test_x -= .5
# validation split
valid_x = train_x[-10000:, :]
train_x = train_x[:-10000, :]
valid_labels = train_labels[-10000:]
train_labels = train_labels[:-10000]
# valid_x = train_x[-10000:, :]
# train_x = train_x[-12000:-11000, :]
# valid_labels = train_labels[-10000:]
# train_labels = train_labels[-12000:-11000]
# pick the selected classes
if classes is not None:
train_x = train_x[
np.any(np.stack([train_labels == c for c in classes], 1), 1), :]
valid_x = valid_x[
np.any(np.stack([valid_labels == c for c in classes], 1), 1), :]
test_x = test_x[
np.any(np.stack([test_labels == c for c in classes], 1), 1), :]
train_labels = [l for l in train_labels if l in classes]
valid_labels = [l for l in valid_labels if l in classes]
test_labels = [l for l in test_labels if l in classes]
else:
classes = np.unique(train_labels).tolist()
train_labels = [l for l in train_labels if l in classes]
valid_labels = [l for l in valid_labels if l in classes]
test_labels = [l for l in test_labels if l in classes]
train_x = torch.from_numpy(train_x).to(torch.device(device))
valid_x = torch.from_numpy(valid_x).to(torch.device(device))
test_x = torch.from_numpy(test_x).to(torch.device(device))
######################################
# Make EinsumNetworks for each class #
######################################
einets = []
ps = []
for c in classes:
if structure == 'poon-domingos':
pd_delta = [[height / d, width / d] for d in pd_num_pieces]
graph = Graph.poon_domingos_structure(shape=(height, width),
delta=pd_delta)
elif structure == 'binary-trees':
graph = Graph.random_binary_trees(
num_var=train_x.shape[1],
depth=depth,
num_repetitions=num_repetitions_mixture)
else:
raise AssertionError("Unknown Structure")
args = EinsumNetwork.Args(
num_var=train_x.shape[1],
num_dims=3 if svhn else 1,
num_classes=1,
num_sums=K,
num_input_distributions=K,
exponential_family=exponential_family,
exponential_family_args=exponential_family_args,
online_em_frequency=online_em_frequency,
online_em_stepsize=online_em_stepsize,
use_em=False)
einet = EinsumNetwork.EinsumNetwork(graph, args)
init_dict = get_init_dict(einet,
train_x,
train_labels=train_labels,
einet_class=c)
einet.initialize(init_dict)
einet.to(device)
einets.append(einet)
# Calculate amount of training samples per class
ps.append(train_labels.count(c))
print(f'Einsum network for class {c}:')
print(einet)
# normalize ps, construct mixture component
ps = [p / sum(ps) for p in ps]
ps = torch.tensor(ps).to(torch.device(device))
mixture = EinetMixture(ps, einets, classes=classes)
num_params = mixture.eval_size()
"""Code for weight analysis, section 7.3"""
# data_dir = '../src/experiments/round5/data/weights_analysis/'
# utils.mkdir_p(data_dir)
# data_file = os.path.join(data_dir, f"weights_before_{c}.json")
# weights = {}
# for (einet, c) in zip(einets, classes):
# einet_weights = {}
# for i, l in enumerate(reversed(einet.einet_layers)):
# if type(l) != FactorizedLeafLayer.FactorizedLeafLayer:
# einet_weights[i] = l.reparam(l.params.data)
# else:
# einet_weights[i] = l.ef_array.reparam(l.ef_array.params.data)
# weights[c] = einet_weights
##################
# Training phase #
##################
sub_net_parameters = None
for einet in mixture.einets:
if sub_net_parameters is None:
sub_net_parameters = list(einet.parameters())
else:
sub_net_parameters += list(einet.parameters())
sub_net_parameters += list(mixture.parameters())
optimizer = torch.optim.SGD(sub_net_parameters, lr=SGD_learning_rate)
""" Learning each sub Network Generatively """
start_time = time.time()
for (einet, c) in zip(einets, classes):
train_x_c = train_x[[l == c for l in train_labels]]
valid_x_c = valid_x[[l == c for l in valid_labels]]
test_x_c = test_x[[l == c for l in test_labels]]
train_N = train_x_c.shape[0]
valid_N = valid_x_c.shape[0]
test_N = test_x_c.shape[0]
for epoch_count in range(num_epochs):
idx_batches = torch.randperm(train_N,
device=device).split(batch_size)
total_loss = 0.0
for idx in idx_batches:
batch_x = train_x_c[idx, :]
optimizer.zero_grad()
outputs = einet.forward(batch_x)
ll_sample = EinsumNetwork.log_likelihoods(outputs)
log_likelihood = ll_sample.sum()
# log_likelihood.backward()
nll = log_likelihood * -1
nll.backward()
optimizer.step()
total_loss += nll.detach().item()
# einet.em_process_batch()
# einet.em_update()
print(f'[{epoch_count}] total loss: {total_loss}')
end_time = time.time()
"""Code for weight analysis"""
# data_dir = '../src/experiments/round5/data/weights_analysis/'
# utils.mkdir_p(data_dir)
# percentual_change = []
# percentual_change_formatted = []
# data_file = os.path.join(data_dir, f"percentual_change.json")
# for (einet, c) in zip(einets, classes):
# einet_change = {}
# for i, l in enumerate(reversed(einet.einet_layers)):
# if type(l) != FactorizedLeafLayer.FactorizedLeafLayer:
# weights_new = l.reparam(l.params.data)
# else:
# weights_new = l.ef_array.reparam(l.ef_array.params.data)
# change = torch.mean(torch.abs(weights[c][i] - weights_new)/weights[c][i]).item()
# einet_change[i] = change
# if i == 0:
# percentual_change_formatted.append(change)
# percentual_change.append(einet_change)
# print(percentual_change)
# with open(data_file, 'w') as f:
# json.dump(percentual_change, f)
# data_file = os.path.join(data_dir, f"percentual_change_formatted.json")
# with open(data_file, 'w') as f:
# json.dump(percentual_change_formatted, f)
################
# Experiment 3 #
################
train_N = train_x.shape[0]
valid_N = valid_x.shape[0]
test_N = test_x.shape[0]
mixture.eval()
train_ll = mixture.eval_loglikelihood_batched(train_x,
batch_size=batch_size,
skip_reparam=True)
valid_ll = mixture.eval_loglikelihood_batched(valid_x,
batch_size=batch_size,
skip_reparam=True)
test_ll = mixture.eval_loglikelihood_batched(test_x,
batch_size=batch_size,
skip_reparam=True)
print()
print(
"Experiment 3: Log-likelihoods --- train LL {} valid LL {} test LL {}"
.format(train_ll / train_N, valid_ll / valid_N, test_ll / test_N))
################
# Experiment 4 #
################
train_labels = torch.tensor(train_labels).to(torch.device(device))
valid_labels = torch.tensor(valid_labels).to(torch.device(device))
test_labels = torch.tensor(test_labels).to(torch.device(device))
acc_train = mixture.eval_accuracy_batched(classes,
train_x,
train_labels,
batch_size=batch_size,
skip_reparam=True)
acc_valid = mixture.eval_accuracy_batched(classes,
valid_x,
valid_labels,
batch_size=batch_size,
skip_reparam=True)
acc_test = mixture.eval_accuracy_batched(classes,
test_x,
test_labels,
batch_size=batch_size,
skip_reparam=True)
print()
print(
"Experiment 4: Classification accuracies --- train acc {} valid acc {} test acc {}"
.format(acc_train, acc_valid, acc_test))
print()
print(f'Network size: {num_params} parameters')
print(f'Training time: {end_time - start_time}s')
return {
'train_ll': train_ll / train_N,
'valid_ll': valid_ll / valid_N,
'test_ll': test_ll / test_N,
'train_acc': acc_train,
'valid_acc': acc_valid,
'test_acc': acc_test,
'network_size': num_params,
'training_time': end_time - start_time,
}