def random_search(learning_rates, num_epochs, threshold=0.42, data_aug=True):
"""
Random search learning rates
Args:
learning_rates -- List of floats
num_epochs -- Boolean, number of epochs to run
threshold -- Float, whether to continue training after the first epoch
Return:
Just print best
"""
best_val_acc = -1
best_lr = -1
val_accs = []
lrs = []
if data_aug:
train_generator, X_test, y_test = get_cifar10()
else:
X_train, y_train, X_test, y_test = get_cifar10(data_augmentation=False)
for count, lr in enumerate(learning_rates):
start = time.time()
print('Count:', count+1)
print('learning_rate: {:.4e}'.format(lr))
# Create a model
model = inception_v1((32, 32, 3), 10)
opt = keras.optimizers.Adam(lr, decay=1e-6)
model.compile(opt, loss='categorical_crossentropy', metrics=['accuracy'])
if data_aug:
h = model.fit_generator(train_generator, epochs=1, verbose=1)
if h.history['acc'][0] > threshold:
model.fit_generator(train_generator, epochs=num_epochs-1, verbose=1)
else:
h = model.fit(X_train, y_train, batch_size=128, epochs=1, verbose=1)
if h.history['acc'][0] > threshold:
h = model.fit(X_train, y_train, batch_size=128, epochs=num_epochs-1, verbose=1)
val_res = model.evaluate(X_test, y_test, batch_size=128, verbose=1)
print('Validation loss: %.4f, accuracy: %.4f' % (val_res[0], val_res[1]))
if best_val_acc < val_res[1]:
best_val_acc = val_res[1]
best_lr = lr
val_accs.append(val_res[1])
lrs.append(lr)
print('Time: %.2f\n' % (time.time()-start))
print('Best val_accuracy: %.4f, learning_rate: %.4e\n' % (best_val_acc, best_lr))
for item in sorted(list(zip(lrs, val_accs)), key=lambda x: x[1], reverse=True):
print('learning_rate: %.4e, val_accuracy: %.4f' % (item[0], item[1]))
def main():
if DATA_AUGMENTATION:
print('Using data augmentation.')
train_generator, X_test, y_test = get_cifar10(batch_size=BATCH_SIZE,
center=True,
normalization=True,
data_augmentation=True)
else:
print('Not using data augmentation.')
(X_train, y_train), (X_test,
y_test) = get_cifar10(batch_size=BATCH_SIZE,
center=True,
normalization=True,
data_augmentation=False)
# Create a ResNet-20 model
model = ResNet_20(input_shape=(32, 32, 3),
n_classes=10,
data_format='channels_last',
initializer='he_normal',
regularizer=l2(REGULARIZATION))
opt = keras.optimizers.Adam(LEARNING_RATE, decay=1e-6)
model.compile(optimizer=opt,
loss='categorical_crossentropy',
metrics=['accuracy'])
# Callbacks
hists = History()
es = keras.callbacks.EarlyStopping(monitor='val_acc', patience=15)
reduce_lr = keras.callbacks.ReduceLROnPlateau(monitor='val_acc',
factor=0.1,
patience=10,
verbose=1)
callbacks = [hists, es, reduce_lr]
if DATA_AUGMENTATION:
model.fit_generator(train_generator,
epochs=EPOCHS,
validation_data=(X_test, y_test),
callbacks=callbacks)
else:
model.fit(X_train,
y_train,
batch_size=BATCH_SIZE,
epochs=EPOCHS,
validation_data=(X_test, y_test),
callbacks=callbacks)
hists.plot()
def main():
if DATA_AUGMENTATION:
print('Using data augmentation.')
train_generator, X_test, y_test = get_cifar10(batch_size=BATCH_SIZE,
center=True,
normalization=True,
data_augmentation=True)
else:
print('Not using data augmentation.')
(X_train, y_train), (X_test,
y_test) = get_cifar10(batch_size=BATCH_SIZE,
center=True,
normalization=True,
data_augmentation=False)
model = inception_v1(input_shape=(32, 32, 3),
n_classes=10,
initializer=KERNEL_INITIALIZER)
model.summary()
optimizer = keras.optimizers.Adam(LEARNING_RATE, decay=1e-6)
model.compile(optimizer=optimizer,
loss='categorical_crossentropy',
metrics=['accuracy'])
# Prepare callbacks for model saving and for learning rate adjustment.
hists = History()
es = keras.callbacks.EarlyStopping(monitor='val_acc', patience=15)
lr_reducer = keras.callbacks.ReduceLROnPlateau(monitor='val_acc',
factor=0.1,
cooldown=0,
patience=10,
verbose=1)
callbacks = [hists]
if DATA_AUGMENTATION:
model.fit_generator(train_generator,
epochs=EPOCHS,
validation_data=(X_test, y_test),
callbacks=callbacks)
else:
model.fit(X_train,
y_train,
batch_size=BATCH_SIZE,
epochs=EPOCHS,
validation_data=(X_test, y_test),
callbacks=callbacks)
hists.plot()
def train():
"""
Performs training and evaluation of ConvNet model.
"""
# Set the random seeds for reproducibility
np.random.seed(42)
cifar10 = cifar10_utils.get_cifar10('cifar10/cifar-10-batches-py')
myConvNet = ConvNet(3, 10)
loss_criterion = nn.CrossEntropyLoss()
optimizer = optim.Adam(myConvNet.parameters())
accuracies = {'train': [], 'test': []}
loss_curve = {'train': [], 'test': []}
for j in range(FLAGS.max_steps):
x, y = cifar10['train'].next_batch(FLAGS.batch_size)
x = torch.from_numpy(x).contiguous()
y = torch.from_numpy(y).contiguous()
optimizer.zero_grad()
outputs = myConvNet(x)
loss = loss_criterion(outputs, torch.argmax(y, 1))
loss.backward()
optimizer.step()
if j % FLAGS.eval_freq == 0:
accuracies['train'].append(accuracy(outputs.detach().numpy(), y.detach().numpy()))
loss_curve['train'].append(loss.detach().numpy())
x, y = cifar10['test'].images, cifar10['test'].labels
x = torch.from_numpy(x)
y = torch.from_numpy(y)
x = x[:1000]
y = y[:1000]
outputs = myConvNet(x)
loss = loss_criterion(outputs, torch.argmax(y, 1))
loss_curve['test'].append(loss.detach().numpy())
print(j)
print(accuracy(outputs.detach().numpy(), y.detach().numpy()))
accuracies['test'].append(accuracy(outputs.detach().numpy(), y.detach().numpy()))
accuracies['train'].append(accuracy(outputs.detach().numpy(), y.detach().numpy()))
loss_curve['train'].append(loss.detach().numpy())
x, y = cifar10['test'].images, cifar10['test'].labels
x = torch.from_numpy(x)
y = torch.from_numpy(y)
x= x[:1000]
y = y[:1000]
outputs = myConvNet(x)
loss = loss_criterion(outputs, torch.argmax(y, 1))
loss_curve['test'].append(loss.detach().numpy())
print(accuracy(outputs.detach().numpy(), y.detach().numpy()))
accuracies['test'].append(accuracy(outputs.detach().numpy(), y.detach().numpy()))
plot_results(accuracies, loss_curve)
def main(argv):
if DATA_AUGMENTATION:
print('Using data augmentation.')
train_generator, X_test, y_test = get_cifar10(batch_size=BATCH_SIZE,
center=True,
normalization=True,
data_augmentation=True)
else:
print('Not using data augmentation.')
(X_train, y_train), (X_test,
y_test) = get_cifar10(batch_size=BATCH_SIZE,
center=True,
normalization=True,
data_augmentation=False)
# Create a keras model
model = my_model(reg=REGULARIZATION, bn=BATCH_NORMALIZATION)
opt = keras.optimizers.Adam(LEARNING_RATE, decay=1e-6)
model.compile(optimizer=opt,
loss='categorical_crossentropy',
metrics=['accuracy'])
# Callbacks
hists = History()
es = keras.callbacks.EarlyStopping(monitor='val_acc', patience=15)
reduce_lr = keras.callbacks.ReduceLROnPlateau(monitor='val_acc',
factor=0.1,
patience=10,
verbose=1)
lr_scheduler = keras.callbacks.LearningRateScheduler(lr_schedule)
callbacks = [hists, lr_scheduler]
if DATA_AUGMENTATION:
model.fit_generator(train_generator,
epochs=EPOCHS,
validation_data=(X_test, y_test),
callbacks=callbacks)
else:
model.fit(X_train,
y_train,
batch_size=BATCH_SIZE,
epochs=EPOCHS,
validation_data=(X_test, y_test),
callbacks=callbacks)
hists.plot()
def train():
"""
Performs training and evaluation of MLP model.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
## Prepare all functions
# Get number of units in each hidden layer specified in the string such as 100,100
if FLAGS.dnn_hidden_units:
dnn_hidden_units = FLAGS.dnn_hidden_units.split(",")
dnn_hidden_units = [
int(dnn_hidden_unit_) for dnn_hidden_unit_ in dnn_hidden_units
]
else:
dnn_hidden_units = []
########################
# PUT YOUR CODE HERE #
#######################
# set up the data
cifar10 = cifar10_utils.get_cifar10(FLAGS.data_dir)
test_images, test_labels = cifar10['test'].images, cifar10['test'].labels
test_vectors = reshape_images(test_images)
# set up the model
mlp_model = MLP(3072, dnn_hidden_units, 10)
loss_module = CrossEntropyModule()
accuracies = []
losses = []
for i in range(FLAGS.max_steps):
images, labels = cifar10['train'].next_batch(FLAGS.batch_size)
image_vectors = reshape_images(images)
# forward pass
model_pred = mlp_model.forward(image_vectors)
# backward pass
loss = loss_module.forward(model_pred, labels)
loss_grad = loss_module.backward(model_pred, labels)
mlp_model.backward(loss_grad)
# update all weights and biases
mlp_model.update(FLAGS.learning_rate)
# evaluate the model on the data set every eval_freq steps
if i % FLAGS.eval_freq == 0:
test_pred = mlp_model.forward(test_vectors)
test_accuracy = accuracy(test_pred, test_labels)
accuracies.append(test_accuracy)
losses.append(loss)
plot_curve(accuracies, 'Accuracy')
plot_curve(losses, 'Loss')
def train():
"""
Performs training and evaluation of MLP model.
TODO:
Implement training and evaluation of MLP model. Evaluate your model on the whole test set each eval_freq iterations.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
## Prepare all functions
# Get number of units in each hidden layer specified in the string such as 100,100
if FLAGS.dnn_hidden_units:
dnn_hidden_units = FLAGS.dnn_hidden_units.split(",")
dnn_hidden_units = [
int(dnn_hidden_unit_) for dnn_hidden_unit_ in dnn_hidden_units
]
else:
dnn_hidden_units = []
dataset = cifar10_utils.get_cifar10(DATA_DIR_DEFAULT)
a, b, c = dataset['train'].images.shape[1:]
n_classes = dataset['train'].labels.shape[1]
n_inputs = a * b * c
mlp = MLP(n_inputs, dnn_hidden_units, n_classes)
crossentropy = CrossEntropyModule()
test_input, test_labels = dataset['test'].images, dataset['test'].labels
test_input = np.reshape(test_input, (test_input.shape[0], n_inputs))
for step in range(FLAGS.max_steps):
input, labels = dataset['train'].next_batch(FLAGS.batch_size)
input = np.reshape(input, (FLAGS.batch_size, n_inputs))
predictions = mlp.forward(input)
dL = crossentropy.backward(predictions, labels)
mlp.backward(dL)
for layer in mlp.layers:
if (layer.__class__ == LinearModule):
layer.params[
'weight'] -= FLAGS.learning_rate * layer.grads['weight']
layer.params[
'bias'] -= FLAGS.learning_rate * layer.grads['bias']
loss = crossentropy.forward(predictions, labels)
if (step % FLAGS.eval_freq == 0):
test_prediction = mlp.forward(test_input)
test_loss = crossentropy.forward(test_prediction, test_labels)
test_accuracy = accuracy(test_prediction, test_labels)
sys.stdout = open(
str(FLAGS.dnn_hidden_units) + '_' + str(FLAGS.learning_rate) +
'_' + str(FLAGS.max_steps) + '_' + str(FLAGS.batch_size) +
'_' + str(FLAGS.batch_size) + '_mlp_numpy.csv', 'a')
print("{},{:f},{:f}".format(step, test_loss, test_accuracy))
def standard_cifar10_get(FLAGS):
if FLAGS.train_model == 'siamese':
cifar10 = cifar10_siamese_utils.get_cifar10(FLAGS.data_dir)
else:
cifar10 = cifar10_utils.get_cifar10(FLAGS.data_dir)
cifar10 = wrap_cifar(cifar10, FLAGS)
image_shape = cifar10.train.images.shape[1:4]
num_classes = cifar10.test.labels.shape[1]
return cifar10, image_shape, num_classes
def train():
"""
Performs training and evaluation of ConvNet model.
TODO:
Implement training and evaluation of ConvNet model. Evaluate your model on the whole test set each eval_freq iterations.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
########################
# PUT YOUR CODE HERE #
#######################
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
cifar10 = cifar10_utils.get_cifar10()
n_channels = 3
n_classes = 10
nr_iterations = FLAGS.max_steps+1
convnet = ConvNet(n_channels, n_classes).to(device)
optimizer = optim.Adam(convnet.parameters(), lr=FLAGS.learning_rate)
loss = nn.CrossEntropyLoss()
accuracies_test = []
accuracies_train = []
losses = []
for i in range(nr_iterations):
x, y = cifar10['train'].next_batch(FLAGS.batch_size) # (batch_size, 3, 32, 32) (batch_size, 10)
x = torch.from_numpy(x).to(device)
y = torch.from_numpy(y).type(torch.LongTensor).to(device)
_, y_target = y.max(1)
optimizer.zero_grad()
prediction = convnet(x)
cross_entropy_loss = loss(prediction, y_target)
losses.append(cross_entropy_loss.item())
cross_entropy_loss.backward()
optimizer.step()
del x, y_target
if i % FLAGS.eval_freq == 0:
x_test, y_test = cifar10['test'].images, cifar10['test'].labels
x_test = torch.from_numpy(x_test).to(device)
y_test = torch.from_numpy(y_test).type(torch.LongTensor).to(device)
pred_test = convnet(x_test)
acc_test = accuracy(pred_test, y_test)
acc_train = accuracy(prediction, y)
accuracies_test.append(acc_test )
accuracies_train.append(acc_train)
print('accuracy at step', i, ': ', acc_test)
del x_test, y_test, pred_test, prediction
def train():
"""
Performs training and evaluation of ConvNet model.
TODO:
Implement training and evaluation of ConvNet model. Evaluate your model on the whole test set each eval_freq iterations.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
########################
# PUT YOUR CODE HERE #
#######################
glb.net = ConvNet([100], 10)
glb.net.cuda()
criterion = nn.CrossEntropyLoss()
optimizer = optim.Adam(glb.net.parameters(), lr=LEARNING_RATE_DEFAULT)
##optimizer = optim.Adagrad(glb.net.parameters(),lr=0.01,weight_decay=0.001)
entropy_sum_list = []
entropies = []
accuracies = []
cifar10 = cifar10_utils.get_cifar10(
'/home/vik1/Downloads/subj/deep_learning/uvadlc_practicals_2018/assignment_1/code/cifar10/cifar-10-batches-py'
)
running_loss = 0
for i in range(1, MAX_STEPS_DEFAULT + 1):
x, y = cifar10['train'].next_batch(BATCH_SIZE_DEFAULT)
##x = x.reshape((BATCH_SIZE_DEFAULT, 32 * 32 * 3))
x = torch.from_numpy(x)
x = x.cuda()
y = torch.from_numpy(y)
y = y.type(torch.LongTensor)
y = y.cuda()
optimizer.zero_grad()
# forward + backward + optimize
outputs = glb.net(x)
loss = criterion(outputs, torch.max(y, 1)[1])
loss.backward()
optimizer.step()
# print statistics
running_loss += loss.item()
if (i % EVAL_FREQ_DEFAULT == 0):
acc = test("test", 312)
print(i, running_loss, acc)
entropy_sum_list.append(running_loss)
running_loss = 0
accuracies.append(acc)
print(entropy_sum_list)
print(accuracies)
plt.plot(entropy_sum_list, 'r-')
plt.show()
plt.close()
plt.plot(accuracies, 'r-')
plt.show()
print("done")
def train():
"""
Performs training and evaluation of ConvNet model.
Implement training and evaluation of ConvNet model. Evaluate your model on the whole test set each eval_freq iterations.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
dataset = cifar10_utils.get_cifar10(DATA_DIR_DEFAULT)
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
a, b, c = dataset['train'].images.shape[1:]
n_classes = dataset['train'].labels.shape[1]
cnn = ConvNet(3, n_classes).to(device)
optimizer = optim.Adam(cnn.parameters(), lr=FLAGS.learning_rate)
crossentropy = nn.CrossEntropyLoss()
n_test = dataset['test'].images.shape[0]
for step in range(FLAGS.max_steps):
input, labels = dataset['train'].next_batch(FLAGS.batch_size)
labels = np.argmax(labels, axis=1)
input, labels = torch.from_numpy(input).to(device), torch.from_numpy(
labels).long().to(device)
predictions = cnn.forward(input)
loss = crossentropy(predictions, labels)
# clean up old gradients
cnn.zero_grad()
loss.backward()
optimizer.step()
if (step == FLAGS.max_steps - 1 or step % FLAGS.eval_freq == 0):
test_loss = []
test_accuracy = []
for i in range(0, n_test, FLAGS.batch_size):
test_input, test_labels = dataset['test'].next_batch(
FLAGS.batch_size)
test_input = torch.from_numpy(test_input).to(device)
test_labels = torch.from_numpy(np.argmax(
test_labels, axis=1)).long().to(device)
test_prediction = cnn.forward(test_input)
test_loss.append(
crossentropy(test_prediction, test_labels).item())
test_accuracy.append(accuracy(test_prediction, test_labels))
sys.stdout = open(
str(FLAGS.learning_rate) + '_' + str(FLAGS.max_steps) + '_' +
str(FLAGS.batch_size) + '_' + str(FLAGS.batch_size) +
'conv.txt', 'a')
print("{},{:f},{:f}".format(step, np.mean(test_loss),
np.mean(test_accuracy)))
def train():
"""
Performs training and evaluation of MLP model.
TODO:
Implement training and evaluation of MLP model. Evaluate your model on the whole test set each eval_freq iterations.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
## Prepare all functions
# Get number of units in each hidden layer specified in the string such as 100,100
if FLAGS.dnn_hidden_units:
dnn_hidden_units = FLAGS.dnn_hidden_units.split(",")
dnn_hidden_units = [
int(dnn_hidden_unit_) for dnn_hidden_unit_ in dnn_hidden_units
]
else:
dnn_hidden_units = []
########################
# PUT YOUR CODE HERE #
#######################
data = cifar10_utils.get_cifar10(FLAGS.data_dir)
n_inputs = 3 * 32 * 32
n_classes = 10
model = MLP(n_inputs, dnn_hidden_units, n_classes)
loss_fn = CrossEntropyModule()
max_accuracy = 0.0
start_time = time.perf_counter()
for step in range(1, FLAGS.max_steps + 1):
x, targets = data['train'].next_batch(FLAGS.batch_size)
input = x.reshape((FLAGS.batch_size, -1))
predictions = model.forward(input)
gradient = loss_fn.backward(predictions, targets)
model.backward(gradient)
model.step(FLAGS.learning_rate)
if step == 1 or step % FLAGS.eval_freq == 0:
training_loss = loss_fn.forward(predictions, targets)
test_predictions = model.forward(data['test'].images.reshape(
data['test'].num_examples, -1))
test_loss = loss_fn.forward(test_predictions, data['test'].labels)
test_acc = accuracy(test_predictions, data['test'].labels)
if test_acc > max_accuracy:
max_accuracy = test_acc
print(
"step %d/%d: training loss: %.3f test loss: %.3f accuracy: %.1f%%"
% (step, FLAGS.max_steps, training_loss, test_loss,
test_acc * 100))
time_taken = time.perf_counter() - start_time
print("Done. Scored %.1f%% in %.1f seconds." %
(max_accuracy * 100, time_taken))
def train():
"""
Performs training and evaluation of MLP model. Evaluate your model on the whole test set each 100 iterations.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
## Prepare all functions
# Get number of units in each hidden layer specified in the string such as 100,100
if FLAGS.dnn_hidden_units:
dnn_hidden_units = FLAGS.dnn_hidden_units.split(",")
dnn_hidden_units = [int(dnn_hidden_unit_) for dnn_hidden_unit_ in dnn_hidden_units]
else:
dnn_hidden_units = []
########################
# PUT YOUR CODE HERE #
#######################
batch_size = FLAGS.batch_size
# Get cifar data
print('Get cifar data')
cifar10 = cifar10_utils.get_cifar10('cifar10/cifar-10-batches-py')
x, y = cifar10.train.next_batch(batch_size)
#x = x.flatten()
x = x.reshape(batch_size, -1)
input_dimensions = x.shape[1]
n_classes = y.shape[1]
print('Data obtained')
# Initialize MLP instance
MLP = mlp_numpy.MLP(dnn_hidden_units, n_classes, input_dimensions, batch_size, FLAGS.weight_reg_strength, FLAGS.weight_init_scale)
# Train
#FLAGS.max_steps = 7
for step in range(FLAGS.max_steps):
logits = MLP.inference(x)
#print(logits)
loss, logits = MLP.loss(logits, y)
#print(logits)
MLP.train_step(loss, FLAGS, logits, y)
if step%10 == 0:
# Calculate accuracy
print(str(step) + ": " + str(MLP.accuracy(logits,y)) + ",\tloss: " + str(loss))
x, y = cifar10.train.next_batch(batch_size)
x = x.reshape(batch_size, -1)
if (step + 1) == FLAGS.max_steps:
# Load test data
test_x, test_y = cifar10.test.images, cifar10.test.labels
test_x = test_x.reshape(test_x.shape[0], -1)
logits = MLP.inference(test_x)
print("Accuracy on test data: " + str(MLP.accuracy(logits,test_y)))
def train():
"""
Performs training and evaluation of ConvNet model.
TODO:
Implement training and evaluation of ConvNet model. Evaluate your model on the whole test set each eval_freq iterations.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
torch.manual_seed(42)
########################
# PUT YOUR CODE HERE #
#######################
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
data = cifar10_utils.get_cifar10(FLAGS.data_dir)
n_inputs = 3 * 32 * 32
n_classes = 10
batches_per_epoch = (int)(data['test'].images.shape[0] /
FLAGS.batch_size) # need this for test set
model = ConvNet(n_inputs, n_classes).to(device)
loss_fn = nn.CrossEntropyLoss()
optimizer = torch.optim.Adam(model.parameters())
max_accuracy = 0.0
start_time = time.perf_counter()
for step in range(1, FLAGS.max_steps + 1):
x, y = get_batch(data, 'train', FLAGS.batch_size, device)
predictions = model.forward(x)
training_loss = loss_fn(predictions, y.argmax(dim=1))
optimizer.zero_grad()
training_loss.backward()
optimizer.step()
if step == 1 or step % FLAGS.eval_freq == 0:
with torch.no_grad():
test_loss = 0
test_acc = 0
for test_batch in range(batches_per_epoch):
x, y = get_batch(data, 'test', FLAGS.batch_size, device)
predictions = model(x)
test_loss += loss_fn(predictions,
y.argmax(dim=1)) / batches_per_epoch
test_acc += accuracy(predictions, y) / batches_per_epoch
if test_acc > max_accuracy:
max_accuracy = test_acc
print(
"step %d/%d: training loss: %.3f test loss: %.3f accuracy: %.1f%%"
% (step, FLAGS.max_steps, training_loss, test_loss,
test_acc * 100))
time_taken = time.perf_counter() - start_time
print("Done. Scored %.1f%% in %.1f seconds." %
(max_accuracy * 100, time_taken))
def train():
"""
Performs training and evaluation of MLP model.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
## Prepare all functions
# Get number of units in each hidden layer specified in the string such as 100,100
if FLAGS.dnn_hidden_units:
dnn_hidden_units = FLAGS.dnn_hidden_units.split(",")
dnn_hidden_units = [
int(dnn_hidden_unit_) for dnn_hidden_unit_ in dnn_hidden_units
]
else:
dnn_hidden_units = []
data = cifar10_utils.get_cifar10(data_dir=FLAGS.data_dir)
train = data['train']
test = data['test']
n_inputs = train.images[0].flatten().shape[0]
n_classes = train.labels[0].shape[0]
mlp = MLP(n_inputs, dnn_hidden_units, n_classes)
loss_mod = CrossEntropyModule()
loss_history = []
acc_history = []
for step in range(FLAGS.max_steps): #FLAGS.max_steps
x, y = train.next_batch(FLAGS.batch_size)
x = x.reshape(x.shape[0], n_inputs)
out = mlp.forward(x)
loss = loss_mod.forward(out, y)
loss_history.append(loss)
dout = loss_mod.backward(out, y)
mlp.backward(dout)
mlp.update(FLAGS.learning_rate)
if step == 0 or (step + 1) % FLAGS.eval_freq == 0:
x, y = test.images, test.labels
x = x.reshape(x.shape[0], n_inputs)
test_out = mlp.forward(x)
acc = accuracy(test_out, y)
print('Accuracy:', acc)
acc_history.append(acc)
print('Final loss:', loss_history[-1])
print('Final acc:', acc_history[-1])
print(len(acc_history))
plt.plot(loss_history)
plt.step(range(0, FLAGS.max_steps + 1, FLAGS.eval_freq), acc_history)
plt.legend(['loss', 'accuracy'])
plt.show()
def train():
#In order to run this function from Jupyter, we must add a class FLAGS as input argument for train
"""
Performs training and evaluation of MLP model. Evaluate your model on the whole test set each 100 iterations.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
## Prepare all functions
# Get number of units in each hidden layer specified in the string such as 100,100
if FLAGS.dnn_hidden_units:
dnn_hidden_units = FLAGS.dnn_hidden_units.split(",")
dnn_hidden_units = [
int(dnn_hidden_unit_) for dnn_hidden_unit_ in dnn_hidden_units
]
else:
dnn_hidden_units = []
########################
# PUT YOUR CODE HERE #
#######################
cifar10 = cifar10_utils.get_cifar10(FLAGS.data_dir)
x_train, y_train = cifar10.train.images, cifar10.train.labels
x_test, y_test = cifar10.test.images, cifar10.test.labels
n_classes = y_test.shape[1]
dim = x_test.shape[1] * x_test.shape[2] * x_test.shape[3]
mlp = mlp_numpy.MLP(dnn_hidden_units,
n_classes,
weight_decay=FLAGS.weight_reg_strength,
weight_scale=FLAGS.weight_init_scale)
#reshape test set
x_test_res = np.reshape(x_test, (x_test.shape[0], dim))
#Perform SGD
for i in range(FLAGS.max_steps + 1):
batch_x, batch_y = next_batch(FLAGS.batch_size, x_train, y_train)
x_res = np.reshape(batch_x, (batch_x.shape[0], batch_x.shape[1] *
batch_x.shape[2] * batch_x.shape[3]))
logits = mlp.inference(x_res)
loss = mlp.loss(logits, batch_y)
mlp.train_step(loss, FLAGS.learning_rate)
if i in [i * 100 for i in range(1, 16)]:
print('Performing iteration ' + str(i) + ' ...')
x_test_res = np.reshape(x_test,
(x_test.shape[0], x_test.shape[1] *
x_test.shape[2] * x_test.shape[3]))
#predict
preds = mlp.inference(x_test_res)
acc = mlp.accuracy(preds, y_test)
print('Accuracy on the test set: ' + str(acc * 100) + '%')
def train():
"""
Performs training and evaluation of MLP model. Evaluate your model on the whole test set each 100 iterations.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
## Prepare all functions
# Get number of units in each hidden layer specified in the string such as 100,100
if FLAGS.dnn_hidden_units:
dnn_hidden_units = FLAGS.dnn_hidden_units.split(",")
dnn_hidden_units = [
int(dnn_hidden_unit_) for dnn_hidden_unit_ in dnn_hidden_units
]
else:
dnn_hidden_units = []
########################
# PUT YOUR CODE HERE #
#######################
model = MLP(n_hidden=dnn_hidden_units,
n_classes=10,
batch_size=FLAGS.batch_size,
input_dim=32 * 32 * 3,
weight_decay=FLAGS.weight_reg_strength,
weight_scale=FLAGS.weight_init_scale)
Datasets = utils.get_cifar10(data_dir=DATA_DIR_DEFAULT,
one_hot=True,
validation_size=0)
for i in range(1500): #(FLAGS.max_steps):
train_batch = Datasets.train.next_batch(batch_size=FLAGS.batch_size)
#Get the model output
logits = model.inference(
x=train_batch[0].reshape([FLAGS.batch_size, 32 * 32 * 3]))
#Get the loss and let the model set the loss derivative.
loss = model.loss(logits=logits, labels=train_batch[1])
#Perform training step
model.train_step(loss=loss, flags=FLAGS)
#Every 100th iteratin print accuracy on the whole test set.
if i % 100 == 0:
# for layer in model.layers:
test_batch = Datasets.test.next_batch(
batch_size=200) #Datasets.test.num_examples
logits = model.inference(
x=test_batch[0].reshape([200, 32 * 32 * 3]))
print('-- Step: ', i, " accuracy: ",
model.accuracy(logits=logits, labels=test_batch[1]), 'loss',
loss)
def train():
"""
Performs training and evaluation of ConvNet model.
TODO:
Implement training and evaluation of ConvNet model. Evaluate your model on the whole test set each eval_freq iterations.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
########################
# PUT YOUR CODE HERE #
#######################
ce_loss = nn.CrossEntropyLoss()
convnet = ConvNet(3, 10)
optimizer = optim.Adam(convnet.parameters(), lr=FLAGS.learning_rate)
c10 = cifar10_utils.get_cifar10(FLAGS.data_dir)
test_data = c10['test'].images[:32]
test_data = torch.tensor(test_data)
targets = c10['test'].labels[:32]
acc_values = []
loss_values = []
for i in range(FLAGS.max_steps): #range(FLAGS.max_steps)
x, y = c10['train'].next_batch(FLAGS.batch_size)
y = y.argmax(axis=1)
x = torch.tensor(x)
y = torch.tensor(y)
optimizer.zero_grad()
out = convnet(x)
loss = ce_loss(out, y)
loss.backward()
optimizer.step()
loss_values.append(loss.item())
# evaluate
if i % FLAGS.eval_freq == 0:
with torch.no_grad():
predictions = convnet(test_data).detach().numpy()
acc = accuracy(predictions, targets)
print('acc', acc, 'loss', loss.item())
acc_values.append(acc)
# save loss and accuracy to file
with open('accuracy_cnn.txt', 'a') as f_acc:
print(acc_values, file=f_acc)
with open('loss_cnn.txt', 'a') as f_loss:
print(loss_values, file=f_loss)
def main():
# Load data
path_to_data = os.path.abspath('cifar10/cifar-10-batches-py/')
cifar10 = cifar10_utils.get_cifar10(data_dir=path_to_data,
one_hot=False,
validation_size=0)
train_set = cifar10['train']
# Initialize model
input_dim = train_set.images[0, :, :, :].size
n_classes = train_set.labels.max() + 1
net = skorch.NeuralNetClassifier(MLP,
criterion=nn.CrossEntropyLoss,
module__n_inputs=input_dim,
module__n_classes=n_classes,
optimizer=torch.optim.Adam)
# params = {
# 'lr' : [0.1, 0.01, 0.001],
# 'module__n_hidden' : [
# [100, 100],
# [1000],
# [50,30,20]
# ],
# 'batch_size' : [64, 128, 256, 512]
# }
params = {
'lr': [0.002],
'module__n_hidden': [[500, 500, 500, 500]],
'optimizer': [torch.optim.Adam]
}
gs = GridSearchCV(net,
params,
cv=5,
scoring='accuracy',
n_jobs=4,
refit=False,
verbose=2)
gs.fit(train_set.images.reshape(train_set.images.shape[0], -1),
train_set.labels)
print()
print('--------')
print()
print('Best params:\t', gs.best_params_)
print('Best score:\t', gs.best_score_)
print()
with open('gridsearch_full_training_set.dill', 'wb') as f:
dill.dump(gs, f)
def train():
"""
Performs training and evaluation of ConvNet model.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
cifar10 = cifar10_utils.get_cifar10('cifar10/cifar-10-batches-py')
x, y = cifar10['train'].next_batch(FLAGS.batch_size)
device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
n_channels = np.size(x, 1)
net = ConvNet(n_channels, 10).to(device)
crossEntropy = nn.CrossEntropyLoss()
optimizer = torch.optim.Adam(net.parameters(), lr=FLAGS.learning_rate)
loss_list = []
accuracy_list = []
test_eval_list = []
for i in range(FLAGS.max_steps):
x = Variable(torch.from_numpy(x), requires_grad = True).to(device)
predictions = net(x).to(device)
numpy_predictions = predictions.cpu().data[:].numpy()
label_index = torch.LongTensor(np.argmax(y, axis = 1)).to(device)
loss = crossEntropy(predictions, label_index)
if i % FLAGS.eval_freq == 0:
current_accuracy = accuracy(numpy_predictions, y)
current_test_accuracy = test(net)
current_loss = loss.cpu().data.numpy()
loss_list.append(current_loss)
accuracy_list.append(current_accuracy)
test_eval_list.append(current_test_accuracy)
print ('Training epoch %d out of %d. Loss %.3f, Train accuracy %.3f, Test accuracy %.3f' % (i, FLAGS.max_steps, current_loss, current_accuracy, current_test_accuracy))
optimizer.zero_grad()
loss.backward()
optimizer.step()
x, y = cifar10['train'].next_batch(FLAGS.batch_size)
# save model
torch.save(net, MODEL_DIRECTORY + CNN_PYTORCH_FILE)
test_accuracy = test(net)
print('Test accuracy %.3f' % (test_accuracy))
def test(net=None):
np.random.seed(42)
cifar10 = cifar10_utils.get_cifar10('cifar10/cifar-10-batches-py')
net = net if net else torch.load(MODEL_DIRECTORY + NUMPY_PYTORCH_FILE)
x = cifar10['test'].images
y = cifar10['test'].labels
x = x.reshape(np.size(x, 0), -1)
predictions = net.forward(x)
return accuracy(predictions, y)
def feature_extraction_siamese():
"""
This method restores a TensorFlow checkpoint file (.ckpt) and rebuilds inference
model with restored parameters. From then on you can basically use that model in
any way you want, for instance, feature extraction, finetuning or as a submodule
of a larger architecture. However, this method should extract features from a
specified layer and store them in data files such as '.h5', '.npy'/'.npz'
depending on your preference. You will use those files later in the assignment.
Args:
[optional]
Returns:
None
"""
########################
# PUT YOUR CODE HERE #
########################
tf.reset_default_graph()
classes = [
'plane', 'car', 'bird', 'cat', 'deer', 'dog', 'frog', 'horse', 'ship',
'truck'
]
tf.set_random_seed(42)
np.random.seed(42)
cifar10 = cifar10_utils.get_cifar10(FLAGS.data_dir)
x_test, y_test = cifar10.test.images, cifar10.test.labels
y_test = np.argmax(y_test, axis=1)
input_data_dim = cifar10.test.images.shape[1]
n_classes = 10
cnn_siamese = Siamese()
x = tf.placeholder(tf.float32,
shape=(None, input_data_dim, input_data_dim, 3),
name="x1")
y = tf.placeholder(tf.float32, shape=(None, 1), name="y")
with tf.name_scope('train_cnn'):
infs1 = cnn_siamese.inference(x, reuse=None)
l2_out = cnn_siamese.l2_out
with tf.Session() as sess:
saver = tf.train.Saver()
saver.restore(sess, FLAGS.checkpoint_dir + '/cnn_model_siamese.ckpt')
l2_out_features = sess.run([l2_out], feed_dict={x: x_test})[0]
_plot_tsne("L2 out", l2_out_features, y_test)
_train_one_vs_all(l2_out_features, y_test, "L2 norm", classes)
def train():
"""
Performs training and evaluation of ConvNet model.
TODO:
Implement training and evaluation of ConvNet model. Evaluate your model on the whole test set each eval_freq iterations.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
########################
# PUT YOUR CODE HERE #
#######################
if FLAGS.batch_size:
batch_size = int(FLAGS.batch_size)
cifar10 = cifar10_utils.get_cifar10();
convNet = ConvNet(3, 10);
print(convNet);
lossfunc = nn.CrossEntropyLoss();
optimizer = torch.optim.Adam(convNet.parameters(),lr=LEARNING_RATE_DEFAULT)
cifar10_train = cifar10['train'];
# get all test image labels and features:
cifar10_test = cifar10['test'];
while (cifar10_train.epochs_completed < 10):
x, y = cifar10_train.next_batch(batch_size);
x_test, y_target = cifar10_test.next_batch(batch_size);
x = torch.autograd.Variable(torch.from_numpy(x));
y = torch.autograd.Variable(torch.from_numpy(y).long());
x_test = torch.autograd.Variable(torch.from_numpy(x_test));
#x_test = x_test.reshape((batch_size, -1));
optimizer.zero_grad();
out = convNet(x);
loss = lossfunc(out,torch.max(y, 1)[1]);
loss.backward();
optimizer.step();
y_test = convNet(x_test);
rate = accuracy(y_test, y_target)
#print('loss: ', crossentropy_loss);
print("Accuracy:", rate)
def test(net=None):
np.random.seed(42)
cifar10 = cifar10_utils.get_cifar10('cifar10/cifar-10-batches-py')
device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
net = net if net else torch.load(MODEL_DIRECTORY +
MLP_PYTORCH_FILE).to(device)
x = cifar10['test'].images
y = cifar10['test'].labels
x = x.reshape(np.size(x, 0), -1)
x = Variable(torch.from_numpy(x), requires_grad=True).to(device)
predictions = net(x)
numpy_predictions = predictions.cpu().data[:].numpy()
return accuracy(numpy_predictions, y)
def test(data_type, num_times):
cifar10 = cifar10_utils.get_cifar10(
'/home/vik1/Downloads/subj/deep_learning/uvadlc_practicals_2018/assignment_1/code/cifar10/cifar-10-batches-py'
)
accu = []
for i in range(0, num_times):
x, y = cifar10[data_type].next_batch(BATCH_SIZE_DEFAULT)
##x=x/2550;
##x[:, 0, :, :] = (x[:, 0, :, :] - glb.mean_red) / (glb.std_red )
##x[:, 1, :, :] = (x[:, 1, :, :] - glb.mean_green) / (glb.std_green )
##x[:, 2, :, :] = (x[:, 2, :, :] - glb.mean_blue) / (glb.std_blue)
x = x.reshape((BATCH_SIZE_DEFAULT, 32 * 32 * 3))
prob = glb.mlp.forward(x)
acc = accuracy(prob, y)
##print(acc)
accu.append(acc)
full_acc = sum(accu) / len(accu)
return full_acc
def train():
"""
Performs training and evaluation of MLP model.
TODO:
Implement training and evaluation of MLP model. Evaluate your model on the whole test set each eval_freq iterations.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
## Prepare all functions
# Get number of units in each hidden layer specified in the string such as 100,100
if FLAGS.dnn_hidden_units:
dnn_hidden_units = FLAGS.dnn_hidden_units.split(",")
dnn_hidden_units = [int(dnn_hidden_unit_) for dnn_hidden_unit_ in dnn_hidden_units]
else:
dnn_hidden_units = []
########################
# PUT YOUR CODE HERE #
#######################
if FLAGS.batch_size:
batch_size = int(FLAGS.batch_size)
data = cifar10_utils.get_cifar10()
data_train = data['train']
x_dim = np.prod(data_train.images.shape[1:])
y_dim = np.prod(data_train.labels.shape[1:])
print(x_dim, y_dim)
mlp = MLP(x_dim, dnn_hidden_units, y_dim)
while data_train.epochs_completed <= 10:
x, y = data_train.next_batch(batch_size)
x = x.reshape(x_dim, batch_size)
out = mlp.forward(x)
loss = mlp.loss.forward(out, y)
dout = mlp.loss.backward(out, y)
mlp.backward(dout)
print("LOSS:", loss)
def test(data_type, num_times):
cifar10 = cifar10_utils.get_cifar10(
'/home/vik1/Downloads/subj/deep_learning/uvadlc_practicals_2018/assignment_1/code/cifar10/cifar-10-batches-py'
)
accu = []
for i in range(0, num_times):
x, y = cifar10[data_type].next_batch(BATCH_SIZE_DEFAULT)
x = x.reshape((BATCH_SIZE_DEFAULT, 32 * 32 * 3))
x = torch.from_numpy(x)
x = x.cuda()
output = glb.net(x)
softmax = torch.nn.Softmax(1)
x = softmax(output)
output = output.cpu()
output = output.detach().numpy()
acc = accuracy(output, y)
accu.append(acc)
full_acc = sum(accu) / len(accu)
return full_acc
def train():
"""
Performs training and evaluation of MLP model.
TODO:
Implement training and evaluation of MLP model. Evaluate your model on the whole test set each eval_freq iterations.
"""
### DO NOT CHANGE SEEDS!
# Set the random seeds for reproducibility
np.random.seed(42)
## Prepare all functions
# Get number of units in each hidden layer specified in the string such as 100,100
if FLAGS.dnn_hidden_units:
dnn_hidden_units = FLAGS.dnn_hidden_units.split(",")
dnn_hidden_units = [
int(dnn_hidden_unit_) for dnn_hidden_unit_ in dnn_hidden_units
]
else:
dnn_hidden_units = []
########################
# PUT YOUR CODE HERE #
#######################
batch_size = 100
image_dim = 32
channels = 3
mlp_classes = 10
mlp_input_size = image_dim * image_dim * channels
data = cifar10_utils.get_cifar10()
train_data = data['train']
validation_data = data['validation']
test_data = data['test']
NN = MLP(mlp_input_size, dnn_hidden_units[0], mlp_classes)
x, y = train_data.next_batch(batch_size)
print(x.shape, y.shape)
for image_label in zip(x, y):
im = np.reshape(image_label[0], (1, mlp_input_size))
im = torch.tensor(im)
out = NN.forward(im)
print(out, image_label[1])
def test(net = None):
np.random.seed(42)
cifar10 = cifar10_utils.get_cifar10('cifar10/cifar-10-batches-py')
device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
net = net if net else torch.load(MODEL_DIRECTORY + CNN_PYTORCH_FILE).to(device)
x, y = cifar10['test'].next_batch(FLAGS.test_batch_size)
accuracy_list = []
number_of_examples = len(cifar10['test'].labels)
counter = 0
while counter <= number_of_examples:
x = Variable(torch.from_numpy(x), requires_grad=False).to(device)
predictions = net(x).to(device)
numpy_predictions = predictions.cpu().data[:].numpy()
accuracy_list.append(accuracy(numpy_predictions, y))
x, y = cifar10['test'].next_batch(FLAGS.batch_size)
counter += FLAGS.test_batch_size
return np.mean(accuracy_list)
def main():
"""
Main function
"""
# Print all Flags to confirm parameter settings
print_flags()
if not os.path.exists(FLAGS.data_dir):
os.makedirs(FLAGS.data_dir)
## Prepare all functions
# Get number of units in each hidden layer specified in the string such as 100,100
if FLAGS.dnn_hidden_units:
dnn_hidden_units = FLAGS.dnn_hidden_units.split(",")
dnn_hidden_units = [
int(dnn_hidden_unit_) for dnn_hidden_unit_ in dnn_hidden_units
]
else:
dnn_hidden_units = []
# neg_slope = FLAGS.neg_slope
data = cifar10_utils.get_cifar10(FLAGS.data_dir,
one_hot=False,
validation_size=0)
img_shape = data["train"].images[0].shape
# print(np.prod(img_shape), dnn_hidden_units, N_CLASSES)
mlp = MLP(np.prod(img_shape), dnn_hidden_units, N_CLASSES)
print(mlp)
optimizer = optim.SGD(mlp.parameters(), lr=FLAGS.learning_rate)
loss_module = nn.CrossEntropyLoss()
# run the training operation
train(mlp, data, optimizer, loss_module)