def main(args):
# Config
device = torch.device(f"cuda:{args.cuda}" if torch.cuda.is_available()
and args.cuda >= 0 else "cpu")
# model
model = MTSimpleMLP()
# CL Benchmark Creation
scenario = SplitMNIST(n_experiences=5, return_task_id=True)
train_stream = scenario.train_stream
test_stream = scenario.test_stream
# Prepare for training & testing
optimizer = Adam(model.parameters(), lr=0.01)
criterion = CrossEntropyLoss()
# choose some metrics and evaluation method
interactive_logger = InteractiveLogger()
eval_plugin = EvaluationPlugin(
accuracy_metrics(minibatch=False,
epoch=True,
experience=True,
stream=True),
forgetting_metrics(experience=True),
loggers=[interactive_logger],
)
# Choose a CL strategy
strategy = EWC(
model=model,
optimizer=optimizer,
criterion=criterion,
train_mb_size=128,
train_epochs=3,
eval_mb_size=128,
device=device,
evaluator=eval_plugin,
ewc_lambda=0.4,
)
# train and test loop
for train_task in train_stream:
strategy.train(train_task)
strategy.eval(test_stream)
def main(args):
model = SimpleMLP(hidden_size=args.hs)
optimizer = torch.optim.SGD(model.parameters(), lr=args.lr)
criterion = torch.nn.CrossEntropyLoss()
# check if selected GPU is available or use CPU
assert args.cuda == -1 or args.cuda >= 0, "cuda must be -1 or >= 0."
device = torch.device(f"cuda:{args.cuda}" if torch.cuda.is_available()
and args.cuda >= 0 else "cpu")
print(f'Using device: {device}')
# create scenario
if args.scenario == 'pmnist':
scenario = PermutedMNIST(n_experiences=args.permutations)
elif args.scenario == 'smnist':
scenario = SplitMNIST(n_experiences=5, return_task_id=False)
else:
raise ValueError("Wrong scenario name. Allowed pmnist, smnist.")
# choose some metrics and evaluation method
interactive_logger = InteractiveLogger()
text_logger = TextLogger(open('log.txt', 'a'))
eval_plugin = EvaluationPlugin(accuracy_metrics(minibatch=True,
epoch=True,
experience=True,
stream=True),
loss_metrics(minibatch=True,
epoch=True,
experience=True,
stream=True),
ExperienceForgetting(),
loggers=[interactive_logger])
# create strategy
strategy = EWC(model,
optimizer,
criterion,
args.ewc_lambda,
args.ewc_mode,
decay_factor=args.decay_factor,
train_epochs=args.epochs,
device=device,
train_mb_size=args.minibatch_size,
evaluator=eval_plugin)
# train on the selected scenario with the chosen strategy
print('Starting experiment...')
results = []
for experience in scenario.train_stream:
print("Start training on experience ", experience.current_experience)
strategy.train(experience)
print("End training on experience", experience.current_experience)
print('Computing accuracy on the test set')
results.append(strategy.eval(scenario.test_stream[:]))
def main(args):
model = SimpleMLP(hidden_size=args.hs)
optimizer = torch.optim.SGD(model.parameters(), lr=args.lr)
criterion = torch.nn.CrossEntropyLoss()
# check if selected GPU is available or use CPU
assert args.cuda == -1 or args.cuda >= 0, "cuda must be -1 or >= 0."
device = torch.device(f"cuda:{args.cuda}" if torch.cuda.is_available()
and args.cuda >= 0 else "cpu")
print(f"Using device: {device}")
# create scenario
if args.scenario == "pmnist":
scenario = PermutedMNIST(n_experiences=args.permutations)
elif args.scenario == "smnist":
mnist_train = MNIST(
root=expanduser("~") + "/.avalanche/data/mnist/",
train=True,
download=True,
transform=ToTensor(),
)
mnist_test = MNIST(
root=expanduser("~") + "/.avalanche/data/mnist/",
train=False,
download=True,
transform=ToTensor(),
)
scenario = nc_benchmark(mnist_train,
mnist_test,
5,
task_labels=False,
seed=1234)
else:
raise ValueError("Wrong scenario name. Allowed pmnist, smnist.")
# choose some metrics and evaluation method
interactive_logger = InteractiveLogger()
tensorboard_logger = TensorboardLogger()
eval_plugin = EvaluationPlugin(
accuracy_metrics(minibatch=True,
epoch=True,
experience=True,
stream=True),
loss_metrics(minibatch=True, epoch=True, experience=True, stream=True),
forgetting_metrics(experience=True, stream=True),
bwt_metrics(experience=True, stream=True),
loggers=[interactive_logger, tensorboard_logger],
)
# create strategy
strategy = EWC(
model,
optimizer,
criterion,
args.ewc_lambda,
args.ewc_mode,
decay_factor=args.decay_factor,
train_epochs=args.epochs,
device=device,
train_mb_size=args.minibatch_size,
evaluator=eval_plugin,
)
# train on the selected scenario with the chosen strategy
print("Starting experiment...")
results = []
for experience in scenario.train_stream:
print("Start training on experience ", experience.current_experience)
strategy.train(experience)
print("End training on experience", experience.current_experience)
print("Computing accuracy on the test set")
results.append(strategy.eval(scenario.test_stream[:]))