def get_deep_learning_model(model_args, valid_dataset):
cuda = torch.cuda.is_available()
device = model_args["device"] if cuda else 'cpu'
if cuda:
torch.backends.cudnn.benchmark = True
seed = model_args["seed"]
# = 20200220 random seed to make results reproducible
# Set random seed to be able to reproduce results
if seed:
set_random_seeds(seed=seed, cuda=cuda)
if model_args["model_type"] == "ShallowFBCSPNet":
model = ShallowFBCSPNet(
model_args["n_chans"],
model_args["n_classes"] + 1,
input_window_samples=model_args["input_window_samples"],
final_conv_length='auto',
)
elif model_args["model_type"] == "SleepStager":
model = model = SleepStager(
n_channels=model_args["n_chans"],
sfreq=model_args["sfreq"],
n_classes=model_args["n_classes"] + 1,
input_size_s=model_args["input_window_samples"] /
model_args["sfreq"],
)
else:
raise ValueError("Boom !")
if cuda:
model.cuda()
clf = EEGClassifier(
model,
criterion=model_args["criterion"],
optimizer=torch.optim.AdamW,
# using test_sample for validation
train_split=predefined_split(valid_dataset),
optimizer__lr=model_args["lr"],
optimizer__weight_decay=model_args["weight_decay"],
batch_size=model_args["batch_size"],
callbacks=[
"accuracy",
("lr_scheduler",
LRScheduler('CosineAnnealingLR',
T_max=model_args["n_epochs"] - 1)),
("early_stopping",
EarlyStopping(monitor='valid_loss',
patience=model_args["patience"]))
],
device=device,
iterator_train__num_workers=20,
iterator_train__pin_memory=True) # torch.in torch.out
return clf
def exp(subject_id):
dataset = MOABBDataset(dataset_name="BNCI2014001", subject_ids=subject_id)
from braindecode.datautil.preprocess import exponential_moving_standardize
from braindecode.datautil.preprocess import MNEPreproc, NumpyPreproc, preprocess
low_cut_hz = 0. # low cut frequency for filtering
high_cut_hz = 49. # high cut frequency for filtering
# Parameters for exponential moving standardization
factor_new = 1e-3
init_block_size = 1000
preprocessors = [
# keep only EEG sensors
MNEPreproc(fn='pick_types', eeg=True, meg=False, stim=False),
# convert from volt to microvolt, directly modifying the numpy array
NumpyPreproc(fn=lambda x: x * 1e6),
# bandpass filter
MNEPreproc(fn='filter', l_freq=low_cut_hz, h_freq=high_cut_hz),
# exponential moving standardization
# NumpyPreproc(fn=exponential_moving_standardize, factor_new=factor_new,
# init_block_size=init_block_size)
]
# Transform the data
preprocess(dataset, preprocessors)
######################################################################
# Create model and compute windowing parameters
# ---------------------------------------------
#
######################################################################
# In contrast to trialwise decoding, we first have to create the model
# before we can cut the dataset into windows. This is because we need to
# know the receptive field of the network to know how large the window
# stride should be.
#
######################################################################
# We first choose the compute/input window size that will be fed to the
# network during training This has to be larger than the networks
# receptive field size and can otherwise be chosen for computational
# efficiency (see explanations in the beginning of this tutorial). Here we
# choose 1000 samples, which are 4 seconds for the 250 Hz sampling rate.
#
input_window_samples = 1000
######################################################################
# Now we create the model. To enable it to be used in cropped decoding
# efficiently, we manually set the length of the final convolution layer
# to some length that makes the receptive field of the ConvNet smaller
# than ``input_window_samples`` (see ``final_conv_length=30`` in the model
# definition).
#
import torch
from braindecode.util import set_random_seeds
from braindecode.models import ShallowFBCSPNet, Deep4Net
cuda = torch.cuda.is_available(
) # check if GPU is available, if True chooses to use it
device = 'cuda:1' if cuda else 'cpu'
if cuda:
torch.backends.cudnn.benchmark = True
seed = 20190706 # random seed to make results reproducible
# Set random seed to be able to reproduce results
set_random_seeds(seed=seed, cuda=cuda)
n_classes = 4
# Extract number of chans from dataset
n_chans = dataset[0][0].shape[0]
# model = Deep4Net(
# n_chans,
# n_classes,
# input_window_samples=input_window_samples,
# final_conv_length="auto",
# )
#
#
#
# embedding_net = Deep4Net_origin(4, 22, input_window_samples)
# model = FcClfNet(embedding_net)
model = ShallowFBCSPNet(
n_chans,
n_classes,
input_window_samples=input_window_samples,
final_conv_length=30,
)
print(model)
# Send model to GPU
if cuda:
model.cuda(device)
######################################################################
# And now we transform model with strides to a model that outputs dense
# prediction, so we can use it to obtain predictions for all
# crops.
#
from braindecode.models.util import to_dense_prediction_model, get_output_shape
to_dense_prediction_model(model)
n_preds_per_input = get_output_shape(model, n_chans,
input_window_samples)[2]
print("n_preds_per_input : ", n_preds_per_input)
print(model)
######################################################################
# Cut the data into windows
# -------------------------
#
######################################################################
# In contrast to trialwise decoding, we have to supply an explicit window size and window stride to the
# ``create_windows_from_events`` function.
#
import numpy as np
from braindecode.datautil.windowers import create_windows_from_events
trial_start_offset_seconds = -0.5
# Extract sampling frequency, check that they are same in all datasets
sfreq = dataset.datasets[0].raw.info['sfreq']
assert all([ds.raw.info['sfreq'] == sfreq for ds in dataset.datasets])
# Calculate the trial start offset in samples.
trial_start_offset_samples = int(trial_start_offset_seconds * sfreq)
# Create windows using braindecode function for this. It needs parameters to define how
# trials should be used.
windows_dataset = create_windows_from_events(
dataset,
trial_start_offset_samples=trial_start_offset_samples,
trial_stop_offset_samples=0,
window_size_samples=input_window_samples,
window_stride_samples=n_preds_per_input,
drop_last_window=False,
preload=True,
)
######################################################################
# Split the dataset
# -----------------
#
# This code is the same as in trialwise decoding.
#
from braindecode.datasets.base import BaseConcatDataset
splitted = windows_dataset.split('session')
train_set = splitted['session_T']
valid_set = splitted['session_E']
lr = 0.0625 * 0.01
weight_decay = 0
batch_size = 8
n_epochs = 100
train_loader = torch.utils.data.DataLoader(train_set,
batch_size=batch_size,
shuffle=True)
# valid_loader = torch.utils.data.DataLoader(valid_set, batch_size=batch_size, shuffle=False)
test_loader = torch.utils.data.DataLoader(valid_set,
batch_size=batch_size,
shuffle=False)
# Send model to GPU
if cuda:
model.cuda(device)
from torch.optim import lr_scheduler
import torch.optim as optim
import argparse
parser = argparse.ArgumentParser(
description='cross subject domain adaptation')
parser.add_argument('--batch-size',
type=int,
default=50,
metavar='N',
help='input batch size for training (default: 64)')
parser.add_argument('--test-batch-size',
type=int,
default=50,
metavar='N',
help='input batch size for testing (default: 1000)')
parser.add_argument('--epochs',
type=int,
default=100,
metavar='N',
help='number of epochs to train (default: 10)')
parser.add_argument('--lr',
type=float,
default=0.001,
metavar='LR',
help='learning rate (default: 0.01)')
parser.add_argument('--momentum',
type=float,
default=0.5,
metavar='M',
help='SGD momentum (default: 0.5)')
parser.add_argument('--no-cuda',
action='store_true',
default=False,
help='disables CUDA training')
parser.add_argument(
'--log-interval',
type=int,
default=10,
metavar='N',
help='how many batches to wait before logging training status')
parser.add_argument('--save-model',
action='store_true',
default=True,
help='For Saving the current Model')
args = parser.parse_args()
args.gpuidx = 0
args.seed = 0
args.use_tensorboard = False
args.save_model = False
optimizer = optim.AdamW(model.parameters(),
lr=lr,
weight_decay=weight_decay)
# scheduler = lr_scheduler.CosineAnnealingWarmRestarts(optimizer, T_0=10, T_mult=1)
scheduler = lr_scheduler.CosineAnnealingLR(optimizer, T_max=n_epochs - 1)
import pandas as pd
results_columns = ['test_loss', 'test_accuracy']
df = pd.DataFrame(columns=results_columns)
for epochidx in range(1, n_epochs):
print(epochidx)
train_crop(10, model, device, train_loader, optimizer, scheduler, cuda,
args.gpuidx)
test_loss, test_score = eval_crop(model, device, test_loader)
results = {'test_loss': test_loss, 'test_accuracy': test_score}
df = df.append(results, ignore_index=True)
print(results)
return df
def test_variable_length_trials_cropped_decoding():
cuda = False
set_random_seeds(seed=20210726, cuda=cuda)
# create fake tuh abnormal dataset
tuh = _TUHAbnormalMock(path='')
# fake variable length trials by cropping first recording
splits = tuh.split([[i] for i in range(len(tuh.datasets))])
preprocess(
concat_ds=splits['0'],
preprocessors=[
Preprocessor('crop', tmax=300),
],
)
variable_tuh = BaseConcatDataset(
[splits[str(i)] for i in range(len(tuh.datasets))])
# make sure we actually have different length trials
assert any(np.diff([ds.raw.n_times for ds in variable_tuh.datasets]) != 0)
# create windows
variable_tuh_windows = create_fixed_length_windows(
concat_ds=variable_tuh,
window_size_samples=1000,
window_stride_samples=1000,
drop_last_window=False,
mapping={
True: 1,
False: 0
},
)
# create train and valid set
splits = variable_tuh_windows.split(
[[i] for i in range(len(variable_tuh_windows.datasets))])
variable_tuh_windows_train = BaseConcatDataset(
[splits[str(i)] for i in range(len(tuh.datasets) - 1)])
variable_tuh_windows_valid = BaseConcatDataset(
[splits[str(len(tuh.datasets) - 1)]])
for x, y, ind in variable_tuh_windows_train:
break
train_split = predefined_split(variable_tuh_windows_valid)
# initialize a model
model = ShallowFBCSPNet(
in_chans=x.shape[0],
n_classes=len(tuh.description.pathological.unique()),
)
to_dense_prediction_model(model)
if cuda:
model.cuda()
# create and train a classifier
clf = EEGClassifier(
model,
cropped=True,
criterion=CroppedLoss,
criterion__loss_function=torch.nn.functional.nll_loss,
optimizer=torch.optim.Adam,
batch_size=32,
callbacks=['accuracy'],
train_split=train_split,
)
clf.fit(variable_tuh_windows_train, y=None, epochs=3)
# make sure it does what we expect
np.testing.assert_allclose(
clf.history[:, 'train_loss'],
np.array([
0.689495325088501,
0.1353449523448944,
0.006638816092163324,
]),
rtol=1e-1,
atol=1e-1,
)
np.testing.assert_allclose(
clf.history[:, 'valid_loss'],
np.array([
2.925871,
3.611423,
4.23494,
]),
rtol=1e-1,
atol=1e-1,
)
def test_trialwise_decoding():
# 5,6,7,10,13,14 are codes for executed and imagined hands/feet
subject_id = 1
event_codes = [5, 6, 9, 10, 13, 14]
# This will download the files if you don't have them yet,
# and then return the paths to the files.
physionet_paths = mne.datasets.eegbci.load_data(subject_id,
event_codes,
update_path=False)
# Load each of the files
parts = [
mne.io.read_raw_edf(path,
preload=True,
stim_channel="auto",
verbose="WARNING") for path in physionet_paths
]
# Concatenate them
raw = concatenate_raws(parts)
raw.apply_function(lambda x: x * 1000000)
# Find the events in this dataset
events, _ = mne.events_from_annotations(raw)
# Use only EEG channels
eeg_channel_inds = mne.pick_types(raw.info,
meg=False,
eeg=True,
stim=False,
eog=False,
exclude="bads")
# Extract trials, only using EEG channels
epoched = mne.Epochs(
raw,
events,
dict(hands=2, feet=3),
tmin=1,
tmax=4.1,
proj=False,
picks=eeg_channel_inds,
baseline=None,
preload=True,
)
ds = EpochsDataset(epoched)
train_set = Subset(ds, np.arange(60))
valid_set = Subset(ds, np.arange(60, len(ds)))
train_valid_split = predefined_split(valid_set)
cuda = False
if cuda:
device = 'cuda'
else:
device = 'cpu'
set_random_seeds(seed=20170629, cuda=cuda)
n_classes = 2
in_chans = train_set[0][0].shape[0]
input_time_length = train_set[0][0].shape[1]
model = ShallowFBCSPNet(
in_chans=in_chans,
n_classes=n_classes,
input_time_length=input_time_length,
final_conv_length="auto",
)
if cuda:
model.cuda()
clf = EEGClassifier(
model,
cropped=False,
criterion=torch.nn.NLLLoss,
optimizer=torch.optim.Adam,
train_split=train_valid_split,
optimizer__lr=0.001,
batch_size=30,
callbacks=["accuracy"],
device=device,
)
clf.fit(train_set, y=None, epochs=6)
np.testing.assert_allclose(
clf.history[:, 'train_loss'],
np.array([
1.1114974617958069, 1.0976492166519165, 0.668171226978302,
0.5880511999130249, 0.7054798305034637, 0.5272344648838043
]),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'valid_loss'],
np.array([
0.8467752933502197, 0.9804958701133728, 0.9134824872016907,
0.8305345773696899, 0.8263336420059204, 0.8535978198051453
]),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'train_accuracy'],
np.array([
0.7166666666666667, 0.6666666666666666, 0.85, 0.9333333333333333,
0.9166666666666666, 0.9
]),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'valid_accuracy'],
np.array([
0.6, 0.5666666666666667, 0.5333333333333333, 0.5333333333333333,
0.6, 0.6666666666666666
]),
rtol=1e-4,
atol=1e-5,
)
def test_eeg_classifier():
# 5,6,7,10,13,14 are codes for executed and imagined hands/feet
subject_id = 1
event_codes = [5, 6, 9, 10, 13, 14]
# This will download the files if you don't have them yet,
# and then return the paths to the files.
physionet_paths = mne.datasets.eegbci.load_data(subject_id,
event_codes,
update_path=False)
# Load each of the files
parts = [
mne.io.read_raw_edf(path,
preload=True,
stim_channel="auto",
verbose="WARNING") for path in physionet_paths
]
# Concatenate them
raw = concatenate_raws(parts)
# Find the events in this dataset
events, _ = mne.events_from_annotations(raw)
# Use only EEG channels
eeg_channel_inds = mne.pick_types(raw.info,
meg=False,
eeg=True,
stim=False,
eog=False,
exclude="bads")
# Extract trials, only using EEG channels
epoched = mne.Epochs(
raw,
events,
dict(hands=2, feet=3),
tmin=1,
tmax=4.1,
proj=False,
picks=eeg_channel_inds,
baseline=None,
preload=True,
)
# Convert data from volt to millivolt
# Pytorch expects float32 for input and int64 for labels.
X = (epoched.get_data() * 1e6).astype(np.float32)
y = (epoched.events[:, 2] - 2).astype(np.int64) # 2,3 -> 0,1
# Set if you want to use GPU
# You can also use torch.cuda.is_available() to determine if cuda is available on your machine.
cuda = False
set_random_seeds(seed=20170629, cuda=cuda)
# This will determine how many crops are processed in parallel
input_window_samples = 450
n_classes = 2
in_chans = X.shape[1]
# final_conv_length determines the size of the receptive field of the ConvNet
model = ShallowFBCSPNet(
in_chans=in_chans,
n_classes=n_classes,
input_window_samples=input_window_samples,
final_conv_length=12,
)
to_dense_prediction_model(model)
if cuda:
model.cuda()
# determine output size
test_input = np_to_var(
np.ones((2, in_chans, input_window_samples, 1), dtype=np.float32))
if cuda:
test_input = test_input.cuda()
out = model(test_input)
n_preds_per_input = out.cpu().data.numpy().shape[2]
train_set = create_from_X_y(X[:48],
y[:48],
drop_last_window=False,
window_size_samples=input_window_samples,
window_stride_samples=n_preds_per_input)
valid_set = create_from_X_y(X[48:60],
y[48:60],
drop_last_window=False,
window_size_samples=input_window_samples,
window_stride_samples=n_preds_per_input)
cropped_cb_train = CroppedTrialEpochScoring(
"accuracy",
name="train_trial_accuracy",
lower_is_better=False,
on_train=True,
)
cropped_cb_valid = CroppedTrialEpochScoring(
"accuracy",
on_train=False,
name="valid_trial_accuracy",
lower_is_better=False,
)
clf = EEGClassifier(
model,
cropped=True,
criterion=CroppedLoss,
criterion__loss_function=nll_loss,
optimizer=optim.Adam,
train_split=predefined_split(valid_set),
batch_size=32,
callbacks=[
("train_trial_accuracy", cropped_cb_train),
("valid_trial_accuracy", cropped_cb_valid),
],
)
clf.fit(train_set, y=None, epochs=4)
expected = [{
'batches': [{
'train_batch_size': 32,
'train_loss': 1.6639312505722046
}, {
'train_batch_size': 32,
'train_loss': 2.6161606311798096
}, {
'train_batch_size': 32,
'train_loss': 1.627132773399353
}, {
'valid_batch_size': 24,
'valid_loss': 0.9677614569664001
}],
'epoch':
1,
'train_batch_count':
3,
'train_loss':
1.9690748850504558,
'train_loss_best':
True,
'train_trial_accuracy':
0.4791666666666667,
'train_trial_accuracy_best':
True,
'valid_batch_count':
1,
'valid_loss':
0.9677614569664001,
'valid_loss_best':
True,
'valid_trial_accuracy':
0.5,
'valid_trial_accuracy_best':
True
}, {
'batches': [{
'train_batch_size': 32,
'train_loss': 1.3829222917556763
}, {
'train_batch_size': 32,
'train_loss': 1.3123714923858643
}, {
'train_batch_size': 32,
'train_loss': 1.0109959840774536
}, {
'valid_batch_size': 24,
'valid_loss': 1.9435862302780151
}],
'epoch':
2,
'train_batch_count':
3,
'train_loss':
1.2354299227396648,
'train_loss_best':
True,
'train_trial_accuracy':
0.5,
'train_trial_accuracy_best':
True,
'valid_batch_count':
1,
'valid_loss':
1.9435862302780151,
'valid_loss_best':
False,
'valid_trial_accuracy':
0.5,
'valid_trial_accuracy_best':
False
}, {
'batches': [{
'train_batch_size': 32,
'train_loss': 1.172208547592163
}, {
'train_batch_size': 32,
'train_loss': 0.8899562954902649
}, {
'train_batch_size': 32,
'train_loss': 1.0232216119766235
}, {
'valid_batch_size': 24,
'valid_loss': 0.9585554599761963
}],
'epoch':
3,
'train_batch_count':
3,
'train_loss':
1.0284621516863506,
'train_loss_best':
True,
'train_trial_accuracy':
0.5,
'train_trial_accuracy_best':
False,
'valid_batch_count':
1,
'valid_loss':
0.9585554599761963,
'valid_loss_best':
True,
'valid_trial_accuracy':
0.5,
'valid_trial_accuracy_best':
False
}, {
'batches': [{
'train_batch_size': 32,
'train_loss': 0.9693693518638611
}, {
'train_batch_size': 32,
'train_loss': 0.900641918182373
}, {
'train_batch_size': 32,
'train_loss': 0.8839665651321411
}, {
'valid_batch_size': 24,
'valid_loss': 0.873468816280365
}],
'epoch':
4,
'train_batch_count':
3,
'train_loss':
0.9179926117261251,
'train_loss_best':
True,
'train_trial_accuracy':
0.625,
'train_trial_accuracy_best':
True,
'valid_batch_count':
1,
'valid_loss':
0.873468816280365,
'valid_loss_best':
True,
'valid_trial_accuracy':
0.4166666666666667,
'valid_trial_accuracy_best':
False
}]
history_without_dur = [{k: v
for k, v in h.items() if k != "dur"}
for h in clf.history]
assert_deep_allclose(expected, history_without_dur, atol=1e-3, rtol=1e-3)
#net = EEGNetv4(n_chans, class_number, input_window_samples=input_window_samples, final_conv_length='auto', drop_prob=0.5)
#net = deepnet(n_chans,class_number,input_window_samples=wind,final_conv_length='auto',) # 81%
#net = deepnet_resnet(n_chans,n_classes,input_window_samples=input_window_samples,expand=True) # 50%
#net=d2lresnet() # 92%
#net=TSception(208)
#net=TSception(1000,n_chans,3,3,0.5)
img_size = [n_chans, wind]
#net = timm.create_model('visformer_tiny',num_classes=n_classes,in_chans=1,img_size=img_size)
if cuda:
net.cuda()
lr = 0.005
weight_decay = 1e-10
criterion = torch.nn.CrossEntropyLoss()
#criterion = nn.NLLLoss()
#optimizer = torch.optim.SGD(net.parameters(), lr=lr, momentum=0.9)
#optimizer = torch.optim.Adadelta(net.parameters(), lr=lr)
optimizer = torch.optim.Adam(net.parameters(), lr=lr)
# Decay LR by a factor of 0.1 every 7 epochs
lr_schedulerr = lr_scheduler.StepLR(optimizer, step_size=5, gamma=0.1)
epoch_num = 100
for epoch in range(epoch_num):
def test_eeg_classifier():
# 5,6,7,10,13,14 are codes for executed and imagined hands/feet
subject_id = 1
event_codes = [5, 6, 9, 10, 13, 14]
# This will download the files if you don't have them yet,
# and then return the paths to the files.
physionet_paths = mne.datasets.eegbci.load_data(subject_id,
event_codes,
update_path=False)
# Load each of the files
parts = [
mne.io.read_raw_edf(path,
preload=True,
stim_channel="auto",
verbose="WARNING") for path in physionet_paths
]
# Concatenate them
raw = concatenate_raws(parts)
# Find the events in this dataset
events, _ = mne.events_from_annotations(raw)
# Use only EEG channels
eeg_channel_inds = mne.pick_types(raw.info,
meg=False,
eeg=True,
stim=False,
eog=False,
exclude="bads")
# Extract trials, only using EEG channels
epoched = mne.Epochs(
raw,
events,
dict(hands=2, feet=3),
tmin=1,
tmax=4.1,
proj=False,
picks=eeg_channel_inds,
baseline=None,
preload=True,
)
# Convert data from volt to millivolt
# Pytorch expects float32 for input and int64 for labels.
X = (epoched.get_data() * 1e6).astype(np.float32)
y = (epoched.events[:, 2] - 2).astype(np.int64) # 2,3 -> 0,1
# Set if you want to use GPU
# You can also use torch.cuda.is_available() to determine if cuda is available on your machine.
cuda = False
set_random_seeds(seed=20170629, cuda=cuda)
# This will determine how many crops are processed in parallel
input_window_samples = 450
n_classes = 2
in_chans = X.shape[1]
# final_conv_length determines the size of the receptive field of the ConvNet
model = ShallowFBCSPNet(
in_chans=in_chans,
n_classes=n_classes,
input_window_samples=input_window_samples,
final_conv_length=12,
)
to_dense_prediction_model(model)
if cuda:
model.cuda()
# determine output size
test_input = np_to_th(
np.ones((2, in_chans, input_window_samples, 1), dtype=np.float32))
if cuda:
test_input = test_input.cuda()
out = model(test_input)
n_preds_per_input = out.cpu().data.numpy().shape[2]
train_set = create_from_X_y(X[:48],
y[:48],
drop_last_window=False,
sfreq=100,
window_size_samples=input_window_samples,
window_stride_samples=n_preds_per_input)
valid_set = create_from_X_y(X[48:60],
y[48:60],
drop_last_window=False,
sfreq=100,
window_size_samples=input_window_samples,
window_stride_samples=n_preds_per_input)
cropped_cb_train = CroppedTrialEpochScoring(
"accuracy",
name="train_trial_accuracy",
lower_is_better=False,
on_train=True,
)
cropped_cb_valid = CroppedTrialEpochScoring(
"accuracy",
on_train=False,
name="valid_trial_accuracy",
lower_is_better=False,
)
clf = EEGClassifier(
model,
cropped=True,
criterion=CroppedLoss,
criterion__loss_function=nll_loss,
optimizer=optim.Adam,
train_split=predefined_split(valid_set),
batch_size=32,
callbacks=[
("train_trial_accuracy", cropped_cb_train),
("valid_trial_accuracy", cropped_cb_valid),
],
)
clf.fit(train_set, y=None, epochs=4)
# Reproduce this exact output by using pprint(history_without_dur) and adjusting
# indentation of all lines after first
expectedh = [{
'batches': [{
'train_batch_size': 32,
'train_loss': 1.4175944328308105
}, {
'train_batch_size': 32,
'train_loss': 2.4414331912994385
}, {
'train_batch_size': 32,
'train_loss': 1.476792812347412
}, {
'valid_batch_size': 24,
'valid_loss': 1.2322615385055542
}],
'epoch':
1,
'train_batch_count':
3,
'train_loss':
1.7786068121592205,
'train_loss_best':
True,
'train_trial_accuracy':
0.5,
'train_trial_accuracy_best':
True,
'valid_batch_count':
1,
'valid_loss':
1.2322615385055542,
'valid_loss_best':
True,
'valid_trial_accuracy':
0.5,
'valid_trial_accuracy_best':
True
}, {
'batches': [{
'train_batch_size': 32,
'train_loss': 0.9673743844032288
}, {
'train_batch_size': 32,
'train_loss': 1.218681812286377
}, {
'train_batch_size': 32,
'train_loss': 1.5651403665542603
}, {
'valid_batch_size': 24,
'valid_loss': 1.123423457145691
}],
'epoch':
2,
'train_batch_count':
3,
'train_loss':
1.250398854414622,
'train_loss_best':
True,
'train_trial_accuracy':
0.5,
'train_trial_accuracy_best':
False,
'valid_batch_count':
1,
'valid_loss':
1.123423457145691,
'valid_loss_best':
True,
'valid_trial_accuracy':
0.5,
'valid_trial_accuracy_best':
False
}, {
'batches': [{
'train_batch_size': 32,
'train_loss': 1.1562678813934326
}, {
'train_batch_size': 32,
'train_loss': 1.5787755250930786
}, {
'train_batch_size': 32,
'train_loss': 1.306514859199524
}, {
'valid_batch_size': 24,
'valid_loss': 1.037418007850647
}],
'epoch':
3,
'train_batch_count':
3,
'train_loss':
1.3471860885620117,
'train_loss_best':
False,
'train_trial_accuracy':
0.5208333333333334,
'train_trial_accuracy_best':
True,
'valid_batch_count':
1,
'valid_loss':
1.037418007850647,
'valid_loss_best':
True,
'valid_trial_accuracy':
0.5,
'valid_trial_accuracy_best':
False
}, {
'batches': [{
'train_batch_size': 32,
'train_loss': 1.8480840921401978
}, {
'train_batch_size': 32,
'train_loss': 1.0466501712799072
}, {
'train_batch_size': 32,
'train_loss': 0.9813234210014343
}, {
'valid_batch_size': 24,
'valid_loss': 0.9420649409294128
}],
'epoch':
4,
'train_batch_count':
3,
'train_loss':
1.2920192281405132,
'train_loss_best':
False,
'train_trial_accuracy':
0.75,
'train_trial_accuracy_best':
True,
'valid_batch_count':
1,
'valid_loss':
0.9420649409294128,
'valid_loss_best':
True,
'valid_trial_accuracy':
0.4166666666666667,
'valid_trial_accuracy_best':
False
}]
history_without_dur = [{k: v
for k, v in h.items() if k != "dur"}
for h in clf.history]
assert_deep_allclose(expectedh, history_without_dur, atol=1e-3, rtol=1e-3)
return clf
def test_trialwise_decoding():
# 5,6,7,10,13,14 are codes for executed and imagined hands/feet
subject_id = 1
event_codes = [5, 6, 9, 10, 13, 14]
# This will download the files if you don't have them yet,
# and then return the paths to the files.
physionet_paths = mne.datasets.eegbci.load_data(
subject_id, event_codes, update_path=False
)
# Load each of the files
parts = [
mne.io.read_raw_edf(
path, preload=True, stim_channel="auto", verbose="WARNING"
)
for path in physionet_paths
]
# Concatenate them
raw = concatenate_raws(parts)
# Find the events in this dataset
events, _ = mne.events_from_annotations(raw)
# Use only EEG channels
eeg_channel_inds = mne.pick_types(
raw.info, meg=False, eeg=True, stim=False, eog=False, exclude="bads"
)
# Extract trials, only using EEG channels
epoched = mne.Epochs(
raw,
events,
dict(hands=2, feet=3),
tmin=1,
tmax=4.1,
proj=False,
picks=eeg_channel_inds,
baseline=None,
preload=True,
)
# Convert data from volt to millivolt
# Pytorch expects float32 for input and int64 for labels.
X = (epoched.get_data() * 1e6).astype(np.float32)
y = (epoched.events[:, 2] - 2).astype(np.int64) # 2,3 -> 0,1
SignalAndTarget = namedtuple("SignalAndTarget", "X y")
train_set = SignalAndTarget(X[:60], y=y[:60])
test_set = SignalAndTarget(X[60:], y=y[60:])
# Set if you want to use GPU
# You can also use torch.cuda.is_available() to determine if cuda is available on your machine.
cuda = False
set_random_seeds(seed=20170629, cuda=cuda)
n_classes = 2
in_chans = train_set.X.shape[1]
# final_conv_length = auto ensures we only get a single output in the time dimension
model = ShallowFBCSPNet(
in_chans=in_chans,
n_classes=n_classes,
input_time_length=train_set.X.shape[2],
final_conv_length="auto",
)
if cuda:
model.cuda()
optimizer = optim.Adam(model.parameters())
rng = RandomState((2017, 6, 30))
losses = []
accuracies = []
for i_epoch in range(6):
i_trials_in_batch = get_balanced_batches(
len(train_set.X), rng, shuffle=True, batch_size=30
)
# Set model to training mode
model.train()
for i_trials in i_trials_in_batch:
# Have to add empty fourth dimension to X
batch_X = train_set.X[i_trials][:, :, :, None]
batch_y = train_set.y[i_trials]
net_in = np_to_var(batch_X)
if cuda:
net_in = net_in.cuda()
net_target = np_to_var(batch_y)
if cuda:
net_target = net_target.cuda()
# Remove gradients of last backward pass from all parameters
optimizer.zero_grad()
# Compute outputs of the network
outputs = model(net_in)
# Compute the loss
loss = F.nll_loss(outputs, net_target)
# Do the backpropagation
loss.backward()
# Update parameters with the optimizer
optimizer.step()
# Print some statistics each epoch
model.eval()
print("Epoch {:d}".format(i_epoch))
for setname, dataset in (("Train", train_set), ("Test", test_set)):
# Here, we will use the entire dataset at once, which is still possible
# for such smaller datasets. Otherwise we would have to use batches.
net_in = np_to_var(dataset.X[:, :, :, None])
if cuda:
net_in = net_in.cuda()
net_target = np_to_var(dataset.y)
if cuda:
net_target = net_target.cuda()
outputs = model(net_in)
loss = F.nll_loss(outputs, net_target)
losses.append(float(var_to_np(loss)))
print("{:6s} Loss: {:.5f}".format(setname, float(var_to_np(loss))))
predicted_labels = np.argmax(var_to_np(outputs), axis=1)
accuracy = np.mean(dataset.y == predicted_labels)
accuracies.append(accuracy * 100)
print("{:6s} Accuracy: {:.1f}%".format(setname, accuracy * 100))
np.testing.assert_allclose(
np.array(losses),
np.array(
[
0.91796708,
1.2714895,
0.4999536,
0.94365239,
0.39268905,
0.89928466,
0.37648854,
0.8940345,
0.35774994,
0.86749417,
0.35080773,
0.80767328,
]
),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
np.array(accuracies),
np.array(
[
55.0,
63.33333333,
71.66666667,
63.33333333,
81.66666667,
60.0,
78.33333333,
63.33333333,
83.33333333,
66.66666667,
80.0,
66.66666667,
]
),
rtol=1e-4,
atol=1e-5,
)
def test_trialwise_decoding():
# 5,6,7,10,13,14 are codes for executed and imagined hands/feet
subject_id = 1
event_codes = [5, 6, 9, 10, 13, 14]
# This will download the files if you don't have them yet,
# and then return the paths to the files.
physionet_paths = mne.datasets.eegbci.load_data(subject_id,
event_codes,
update_path=False)
# Load each of the files
parts = [
mne.io.read_raw_edf(path,
preload=True,
stim_channel="auto",
verbose="WARNING") for path in physionet_paths
]
# Concatenate them
raw = concatenate_raws(parts)
raw.apply_function(lambda x: x * 1000000)
# Find the events in this dataset
events, _ = mne.events_from_annotations(raw)
# Use only EEG channels
eeg_channel_inds = mne.pick_types(raw.info,
meg=False,
eeg=True,
stim=False,
eog=False,
exclude="bads")
# Extract trials, only using EEG channels
epoched = mne.Epochs(
raw,
events,
dict(hands=2, feet=3),
tmin=1,
tmax=4.1,
proj=False,
picks=eeg_channel_inds,
baseline=None,
preload=True,
)
ds = EpochsDataset(epoched)
train_set = Subset(ds, np.arange(60))
valid_set = Subset(ds, np.arange(60, len(ds)))
train_valid_split = predefined_split(valid_set)
cuda = False
if cuda:
device = 'cuda'
else:
device = 'cpu'
set_random_seeds(seed=20170629, cuda=cuda)
n_classes = 2
in_chans = train_set[0][0].shape[0]
input_window_samples = train_set[0][0].shape[1]
model = ShallowFBCSPNet(
in_chans=in_chans,
n_classes=n_classes,
input_window_samples=input_window_samples,
final_conv_length="auto",
)
if cuda:
model.cuda()
clf = EEGClassifier(
model,
cropped=False,
criterion=torch.nn.NLLLoss,
optimizer=torch.optim.Adam,
train_split=train_valid_split,
optimizer__lr=0.001,
batch_size=30,
callbacks=["accuracy"],
device=device,
)
clf.fit(train_set, y=None, epochs=6)
np.testing.assert_allclose(
clf.history[:, 'train_loss'],
np.array([
1.501254916191101, 0.8498813807964325, 0.6930762231349945,
0.7033905684947968, 0.7674900889396667, 0.47585436701774597
]),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'valid_loss'],
np.array([
0.9057853817939758, 1.0028964281082153, 0.85847407579422,
0.88216233253479, 0.8980739712715149, 0.8764537572860718
]),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'train_accuracy'],
np.array([
0.7666666666666667, 0.7333333333333333, 0.8166666666666667,
0.8333333333333334, 0.9333333333333333, 0.9333333333333333
]),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'valid_accuracy'],
np.array([
0.5666666666666667,
0.5666666666666667,
0.6,
0.6,
0.6,
0.6,
]),
rtol=1e-4,
atol=1e-5,
)
def test_experiment_class():
# 5,6,7,10,13,14 are codes for executed and imagined hands/feet
subject_id = 1
event_codes = [5, 6, 9, 10, 13, 14]
# This will download the files if you don't have them yet,
# and then return the paths to the files.
physionet_paths = mne.datasets.eegbci.load_data(subject_id, event_codes)
# Load each of the files
parts = [
mne.io.read_raw_edf(path,
preload=True,
stim_channel='auto',
verbose='WARNING') for path in physionet_paths
]
# Concatenate them
raw = concatenate_raws(parts)
# Find the events in this dataset
events, _ = mne.events_from_annotations(raw)
# Use only EEG channels
eeg_channel_inds = mne.pick_types(raw.info,
meg=False,
eeg=True,
stim=False,
eog=False,
exclude='bads')
# Extract trials, only using EEG channels
epoched = mne.Epochs(raw,
events,
dict(hands=2, feet=3),
tmin=1,
tmax=4.1,
proj=False,
picks=eeg_channel_inds,
baseline=None,
preload=True)
# Convert data from volt to millivolt
# Pytorch expects float32 for input and int64 for labels.
X = (epoched.get_data() * 1e6).astype(np.float32)
y = (epoched.events[:, 2] - 2).astype(np.int64) # 2,3 -> 0,1
train_set = SignalAndTarget(X[:60], y=y[:60])
test_set = SignalAndTarget(X[60:], y=y[60:])
train_set, valid_set = split_into_two_sets(train_set,
first_set_fraction=0.8)
# Set if you want to use GPU
# You can also use torch.cuda.is_available() to determine if cuda is available on your machine.
cuda = False
set_random_seeds(seed=20170629, cuda=cuda)
# This will determine how many crops are processed in parallel
input_time_length = 450
n_classes = 2
in_chans = train_set.X.shape[1]
# final_conv_length determines the size of the receptive field of the ConvNet
model = ShallowFBCSPNet(in_chans=in_chans,
n_classes=n_classes,
input_time_length=input_time_length,
final_conv_length=12).create_network()
to_dense_prediction_model(model)
if cuda:
model.cuda()
optimizer = optim.Adam(model.parameters())
# determine output size
test_input = np_to_var(
np.ones((2, in_chans, input_time_length, 1), dtype=np.float32))
if cuda:
test_input = test_input.cuda()
out = model(test_input)
n_preds_per_input = out.cpu().data.numpy().shape[2]
print("{:d} predictions per input/trial".format(n_preds_per_input))
# Iterator is used to iterate over datasets both for training
# and evaluation
iterator = CropsFromTrialsIterator(batch_size=32,
input_time_length=input_time_length,
n_preds_per_input=n_preds_per_input)
# Loss function takes predictions as they come out of the network and the targets
# and returns a loss
def loss_function(preds, targets):
return F.nll_loss(th.mean(preds, dim=2, keepdim=False), targets)
# Could be used to apply some constraint on the models, then should be object
# with apply method that accepts a module
model_constraint = None
# Monitors log the training progress
monitors = [
LossMonitor(),
MisclassMonitor(col_suffix='sample_misclass'),
CroppedTrialMisclassMonitor(input_time_length),
RuntimeMonitor(),
]
# Stop criterion determines when the first stop happens
stop_criterion = MaxEpochs(4)
exp = Experiment(model,
train_set,
valid_set,
test_set,
iterator,
loss_function,
optimizer,
model_constraint,
monitors,
stop_criterion,
remember_best_column='valid_misclass',
run_after_early_stop=True,
batch_modifier=None,
cuda=cuda)
# need to setup python logging before to be able to see anything
logging.basicConfig(format='%(asctime)s %(levelname)s : %(message)s',
level=logging.DEBUG,
stream=sys.stdout)
exp.run()
compare_df = pd.read_csv(
StringIO(
'train_loss,valid_loss,test_loss,train_sample_misclass,valid_sample_misclass,'
'test_sample_misclass,train_misclass,valid_misclass,test_misclass\n'
'14.167170524597168,13.910758018493652,15.945781707763672,0.5,0.5,'
'0.5333333333333333,0.5,0.5,0.5333333333333333\n'
'1.1735659837722778,1.4342904090881348,1.8664429187774658,0.4629567736185384,'
'0.5120320855614973,0.5336007130124778,0.5,0.5,0.5333333333333333\n'
'1.3168460130691528,1.60431969165802,1.9181344509124756,0.49298128342245995,'
'0.5109180035650625,0.531729055258467,0.5,0.5,0.5333333333333333\n'
'0.8465543389320374,1.280307412147522,1.439755916595459,0.4413435828877005,'
'0.5461229946524064,0.5283422459893048,0.47916666666666663,0.5,'
'0.5333333333333333\n0.6977059841156006,1.1762590408325195,1.2779350280761719,'
'0.40290775401069523,0.588903743315508,0.5307486631016043,0.5,0.5,0.5\n'
'0.7934166193008423,1.1762590408325195,1.2779350280761719,0.4401069518716577,'
'0.588903743315508,0.5307486631016043,0.5,0.5,0.5\n0.5982189178466797,'
'0.8581563830375671,0.9598925113677979,0.32032085561497325,0.47660427807486627,'
'0.4672905525846702,0.31666666666666665,0.5,0.4666666666666667\n0.5044312477111816,'
'0.7133197784423828,0.8164243102073669,0.2591354723707665,0.45699643493761144,'
'0.4393048128342246,0.16666666666666663,0.41666666666666663,0.43333333333333335\n'
'0.4815250039100647,0.6736412644386292,0.8016976714134216,0.23413547237076648,'
'0.39505347593582885,0.42932263814616756,0.15000000000000002,0.41666666666666663,0.5\n'
))
for col in compare_df:
np.testing.assert_allclose(np.array(compare_df[col]),
exp.epochs_df[col],
rtol=1e-3,
atol=1e-4)
def exp(subject_id):
test_subj = np.r_[subject_id]
print('test subj:' + str(test_subj))
train_subj = np.setdiff1d(np.r_[1:11], test_subj)
train_set = BaseConcatDataset([splitted[ids] for ids in train_subj])
valid_set = BaseConcatDataset([splitted[ids] for ids in test_subj])
# #
model = ShallowFBCSPNet(
n_chans,
n_classes,
input_window_samples=input_window_samples,
final_conv_length=30,
)
# #
# embedding_net = Deep4Net_origin(4, 22, input_window_samples)
# model = FcClfNet(embedding_net)
print(model)
# Send model to GPU
if cuda:
model.cuda()
from braindecode.models.util import to_dense_prediction_model, get_output_shape
to_dense_prediction_model(model)
######################################################################
# Training
# --------
#
######################################################################
# In difference to trialwise decoding, we now should supply
# ``cropped=True`` to the EEGClassifier, and ``CroppedLoss`` as the
# criterion, as well as ``criterion__loss_function`` as the loss function
# applied to the meaned predictions.
#
######################################################################
# .. note::
# In this tutorial, we use some default parameters that we
# have found to work well for motor decoding, however we strongly
# encourage you to perform your own hyperparameter optimization using
# cross validation on your training data.
#
from skorch.callbacks import LRScheduler
from skorch.helper import predefined_split
from braindecode import EEGClassifier
from braindecode.training.losses import CroppedLoss
from braindecode.training.scoring import trial_preds_from_window_preds
# # These values we found good for shallow network:
lr = 0.0625 * 0.01
weight_decay = 0
# # For deep4 they should be:
# lr = 1 * 0.01
# weight_decay = 0.5 * 0.001
batch_size = 400
n_epochs = 100
clf = EEGClassifier(
model,
cropped=True,
criterion=CroppedLoss,
criterion__loss_function=torch.nn.functional.nll_loss,
optimizer=torch.optim.AdamW,
train_split=predefined_split(valid_set),
optimizer__lr=lr,
optimizer__weight_decay=weight_decay,
iterator_train__shuffle=True,
batch_size=batch_size,
callbacks=[
"accuracy",
("lr_scheduler",
LRScheduler('CosineAnnealingLR', T_max=n_epochs - 1)),
],
device=device,
)
# Model training for a specified number of epochs. `y` is None as it is already supplied
# in the dataset.
clf.fit(train_set, y=None, epochs=n_epochs)
######################################################################
# Plot Results
# ------------
#
######################################################################
# This is again the same code as in trialwise decoding.
#
# .. note::
# Note that we drop further in the classification error and
# loss as in the trialwise decoding tutorial.
#
import matplotlib.pyplot as plt
from matplotlib.lines import Line2D
import pandas as pd
# Extract loss and accuracy values for plotting from history object
results_columns = [
'train_loss', 'valid_loss', 'train_accuracy', 'valid_accuracy'
]
df = pd.DataFrame(clf.history[:, results_columns],
columns=results_columns,
index=clf.history[:, 'epoch'])
# get percent of misclass for better visual comparison to loss
df = df.assign(train_misclass=100 - 100 * df.train_accuracy,
valid_misclass=100 - 100 * df.valid_accuracy)
plt.style.use('seaborn')
fig, ax1 = plt.subplots(figsize=(8, 3))
df.loc[:, ['train_loss', 'valid_loss']].plot(ax=ax1,
style=['-', ':'],
marker='o',
color='tab:blue',
legend=False,
fontsize=14)
ax1.tick_params(axis='y', labelcolor='tab:blue', labelsize=14)
ax1.set_ylabel("Loss", color='tab:blue', fontsize=14)
ax2 = ax1.twinx() # instantiate a second axes that shares the same x-axis
df.loc[:, ['train_misclass', 'valid_misclass']].plot(ax=ax2,
style=['-', ':'],
marker='o',
color='tab:red',
legend=False)
ax2.tick_params(axis='y', labelcolor='tab:red', labelsize=14)
ax2.set_ylabel("Misclassification Rate [%]", color='tab:red', fontsize=14)
ax2.set_ylim(ax2.get_ylim()[0], 85) # make some room for legend
ax1.set_xlabel("Epoch", fontsize=14)
# where some data has already been plotted to ax
handles = []
handles.append(
Line2D([0], [0],
color='black',
linewidth=1,
linestyle='-',
label='Train'))
handles.append(
Line2D([0], [0],
color='black',
linewidth=1,
linestyle=':',
label='Valid'))
plt.legend(handles, [h.get_label() for h in handles], fontsize=14)
plt.tight_layout()
return df
#
# embedding_net = Deep4Net_origin(4, 22, input_window_samples)
# model = FcClfNet(embedding_net)
model = ShallowFBCSPNet(
n_chans,
n_classes,
input_window_samples=input_window_samples,
final_conv_length=30,
)
print(model)
# Send model to GPU
if cuda:
model.cuda(device)
######################################################################
# And now we transform model with strides to a model that outputs dense
# prediction, so we can use it to obtain predictions for all
# crops.
#
from braindecode.models.util import to_dense_prediction_model, get_output_shape
to_dense_prediction_model(model)
######################################################################
# To know the models’ receptive field, we calculate the shape of model
# output for a dummy input.
#
# dummy_input = torch.ones(
def exp(subject_id):
dataset = MOABBDataset(dataset_name="BNCI2014001", subject_ids=subject_id)
from braindecode.datautil.preprocess import exponential_moving_standardize
from braindecode.datautil.preprocess import MNEPreproc, NumpyPreproc, preprocess
low_cut_hz = 0. # low cut frequency for filtering
high_cut_hz = 38. # high cut frequency for filtering
# Parameters for exponential moving standardization
factor_new = 1e-3
init_block_size = 1000
preprocessors = [
# keep only EEG sensors
MNEPreproc(fn='pick_types', eeg=True, meg=False, stim=False),
# convert from volt to microvolt, directly modifying the numpy array
NumpyPreproc(fn=lambda x: x * 1e6),
# bandpass filter
MNEPreproc(fn='filter', l_freq=low_cut_hz, h_freq=high_cut_hz),
# exponential moving standardization
# NumpyPreproc(fn=exponential_moving_standardize, factor_new=factor_new,
# init_block_size=init_block_size)
]
# Transform the data
preprocess(dataset, preprocessors)
######################################################################
# Create model and compute windowing parameters
# ---------------------------------------------
#
######################################################################
# In contrast to trialwise decoding, we first have to create the model
# before we can cut the dataset into windows. This is because we need to
# know the receptive field of the network to know how large the window
# stride should be.
#
######################################################################
# We first choose the compute/input window size that will be fed to the
# network during training This has to be larger than the networks
# receptive field size and can otherwise be chosen for computational
# efficiency (see explanations in the beginning of this tutorial). Here we
# choose 1000 samples, which are 4 seconds for the 250 Hz sampling rate.
#
input_window_samples = 1000
######################################################################
# Now we create the model. To enable it to be used in cropped decoding
# efficiently, we manually set the length of the final convolution layer
# to some length that makes the receptive field of the ConvNet smaller
# than ``input_window_samples`` (see ``final_conv_length=30`` in the model
# definition).
#
import torch
from braindecode.util import set_random_seeds
from braindecode.models import ShallowFBCSPNet, Deep4Net
cuda = torch.cuda.is_available(
) # check if GPU is available, if True chooses to use it
device = 'cuda:1' if cuda else 'cpu'
if cuda:
torch.backends.cudnn.benchmark = True
seed = 20190706 # random seed to make results reproducible
# Set random seed to be able to reproduce results
set_random_seeds(seed=seed, cuda=cuda)
n_classes = 4
# Extract number of chans from dataset
n_chans = dataset[0][0].shape[0]
# model = Deep4Net(
# n_chans,
# n_classes,
# input_window_samples=input_window_samples,
# final_conv_length="auto",
# )
#
#
#
# embedding_net = Deep4Net_origin(4, 22, input_window_samples)
# model = FcClfNet(embedding_net)
model = ShallowFBCSPNet(
n_chans,
n_classes,
input_window_samples=input_window_samples,
final_conv_length=30,
)
print(model)
# Send model to GPU
if cuda:
model.cuda(device)
######################################################################
# And now we transform model with strides to a model that outputs dense
# prediction, so we can use it to obtain predictions for all
# crops.
#
from braindecode.models.util import to_dense_prediction_model, get_output_shape
to_dense_prediction_model(model)
n_preds_per_input = get_output_shape(model, n_chans,
input_window_samples)[2]
print("n_preds_per_input : ", n_preds_per_input)
print(model)
######################################################################
# Cut the data into windows
# -------------------------
#
######################################################################
# In contrast to trialwise decoding, we have to supply an explicit window size and window stride to the
# ``create_windows_from_events`` function.
#
import numpy as np
from braindecode.datautil.windowers import create_windows_from_events
trial_start_offset_seconds = -0.5
# Extract sampling frequency, check that they are same in all datasets
sfreq = dataset.datasets[0].raw.info['sfreq']
assert all([ds.raw.info['sfreq'] == sfreq for ds in dataset.datasets])
# Calculate the trial start offset in samples.
trial_start_offset_samples = int(trial_start_offset_seconds * sfreq)
# Create windows using braindecode function for this. It needs parameters to define how
# trials should be used.
windows_dataset = create_windows_from_events(
dataset,
trial_start_offset_samples=trial_start_offset_samples,
trial_stop_offset_samples=0,
window_size_samples=input_window_samples,
window_stride_samples=n_preds_per_input,
drop_last_window=False,
preload=True,
)
######################################################################
# Split the dataset
# -----------------
#
# This code is the same as in trialwise decoding.
#
from braindecode.datasets.base import BaseConcatDataset
splitted = windows_dataset.split('session')
train_set = splitted['session_T']
valid_set = splitted['session_E']
######################################################################
# In difference to trialwise decoding, we now should supply
# ``cropped=True`` to the EEGClassifier, and ``CroppedLoss`` as the
# criterion, as well as ``criterion__loss_function`` as the loss function
# applied to the meaned predictions.
#
######################################################################
# .. note::
# In this tutorial, we use some default parameters that we
# have found to work well for motor decoding, however we strongly
# encourage you to perform your own hyperparameter optimization using
# cross validation on your training data.
#
from skorch.callbacks import LRScheduler
from skorch.helper import predefined_split
from braindecode import EEGClassifier
from braindecode.training.losses import CroppedLoss
from braindecode.training.scoring import trial_preds_from_window_preds
# # These values we found good for shallow network:
lr = 0.0625 * 0.01
weight_decay = 0
# # For deep4 they should be:
# lr = 1 * 0.01
# weight_decay = 0.5 * 0.001
#
batch_size = 8
n_epochs = 100
clf = EEGClassifier(
model,
cropped=True,
criterion=CroppedLoss,
criterion__loss_function=torch.nn.functional.nll_loss,
optimizer=torch.optim.AdamW,
train_split=predefined_split(valid_set),
optimizer__lr=lr,
optimizer__weight_decay=weight_decay,
iterator_train__shuffle=True,
batch_size=batch_size,
callbacks=[
"accuracy",
("lr_scheduler",
LRScheduler('CosineAnnealingLR', T_max=n_epochs - 1)),
],
device=device,
)
# Model training for a specified number of epochs. `y` is None as it is already supplied
# in the dataset.
clf.fit(train_set, y=None, epochs=n_epochs)
######################################################################
# Plot Results
# ------------
#
######################################################################
# This is again the same code as in trialwise decoding.
#
# .. note::
# Note that we drop further in the classification error and
# loss as in the trialwise decoding tutorial.
#
import matplotlib.pyplot as plt
from matplotlib.lines import Line2D
import pandas as pd
# Extract loss and accuracy values for plotting from history object
results_columns = [
'train_loss', 'valid_loss', 'train_accuracy', 'valid_accuracy'
]
df = pd.DataFrame(clf.history[:, results_columns],
columns=results_columns,
index=clf.history[:, 'epoch'])
# get percent of misclass for better visual comparison to loss
df = df.assign(train_misclass=100 - 100 * df.train_accuracy,
valid_misclass=100 - 100 * df.valid_accuracy)
plt.style.use('seaborn')
fig, ax1 = plt.subplots(figsize=(8, 3))
df.loc[:, ['train_loss', 'valid_loss']].plot(ax=ax1,
style=['-', ':'],
marker='o',
color='tab:blue',
legend=False,
fontsize=14)
ax1.tick_params(axis='y', labelcolor='tab:blue', labelsize=14)
ax1.set_ylabel("Loss", color='tab:blue', fontsize=14)
ax2 = ax1.twinx() # instantiate a second axes that shares the same x-axis
df.loc[:, ['train_misclass', 'valid_misclass']].plot(ax=ax2,
style=['-', ':'],
marker='o',
color='tab:red',
legend=False)
ax2.tick_params(axis='y', labelcolor='tab:red', labelsize=14)
ax2.set_ylabel("Misclassification Rate [%]", color='tab:red', fontsize=14)
ax2.set_ylim(ax2.get_ylim()[0], 85) # make some room for legend
ax1.set_xlabel("Epoch", fontsize=14)
# where some data has already been plotted to ax
handles = []
handles.append(
Line2D([0], [0],
color='black',
linewidth=1,
linestyle='-',
label='Train'))
handles.append(
Line2D([0], [0],
color='black',
linewidth=1,
linestyle=':',
label='Valid'))
plt.legend(handles, [h.get_label() for h in handles], fontsize=14)
plt.tight_layout()
return df
def test_eeg_classifier():
# 5,6,7,10,13,14 are codes for executed and imagined hands/feet
subject_id = 1
event_codes = [5, 6, 9, 10, 13, 14]
# This will download the files if you don't have them yet,
# and then return the paths to the files.
physionet_paths = mne.datasets.eegbci.load_data(subject_id,
event_codes,
update_path=False)
# Load each of the files
parts = [
mne.io.read_raw_edf(path,
preload=True,
stim_channel="auto",
verbose="WARNING") for path in physionet_paths
]
# Concatenate them
raw = concatenate_raws(parts)
# Find the events in this dataset
events, _ = mne.events_from_annotations(raw)
# Use only EEG channels
eeg_channel_inds = mne.pick_types(raw.info,
meg=False,
eeg=True,
stim=False,
eog=False,
exclude="bads")
# Extract trials, only using EEG channels
epoched = mne.Epochs(
raw,
events,
dict(hands=2, feet=3),
tmin=1,
tmax=4.1,
proj=False,
picks=eeg_channel_inds,
baseline=None,
preload=True,
)
# Convert data from volt to millivolt
# Pytorch expects float32 for input and int64 for labels.
X = (epoched.get_data() * 1e6).astype(np.float32)
y = (epoched.events[:, 2] - 2).astype(np.int64) # 2,3 -> 0,1
# Set if you want to use GPU
# You can also use torch.cuda.is_available() to determine if cuda is available on your machine.
cuda = False
set_random_seeds(seed=20170629, cuda=cuda)
# This will determine how many crops are processed in parallel
input_window_samples = 450
n_classes = 2
in_chans = X.shape[1]
# final_conv_length determines the size of the receptive field of the ConvNet
model = ShallowFBCSPNet(
in_chans=in_chans,
n_classes=n_classes,
input_window_samples=input_window_samples,
final_conv_length=12,
)
to_dense_prediction_model(model)
if cuda:
model.cuda()
# determine output size
test_input = np_to_var(
np.ones((2, in_chans, input_window_samples, 1), dtype=np.float32))
if cuda:
test_input = test_input.cuda()
out = model(test_input)
n_preds_per_input = out.cpu().data.numpy().shape[2]
train_set = create_from_X_y(X[:48],
y[:48],
drop_last_window=False,
window_size_samples=input_window_samples,
window_stride_samples=n_preds_per_input)
valid_set = create_from_X_y(X[48:60],
y[48:60],
drop_last_window=False,
window_size_samples=input_window_samples,
window_stride_samples=n_preds_per_input)
cropped_cb_train = CroppedTrialEpochScoring(
"accuracy",
name="train_trial_accuracy",
lower_is_better=False,
on_train=True,
)
cropped_cb_valid = CroppedTrialEpochScoring(
"accuracy",
on_train=False,
name="valid_trial_accuracy",
lower_is_better=False,
)
clf = EEGClassifier(
model,
criterion=CroppedLoss,
criterion__loss_function=nll_loss,
optimizer=optim.Adam,
train_split=predefined_split(valid_set),
batch_size=32,
callbacks=[
("train_trial_accuracy", cropped_cb_train),
("valid_trial_accuracy", cropped_cb_valid),
],
)
clf.fit(train_set, y=None, epochs=4)
expected = [
{
"batches": [
{
"train_loss": 1.9391239881515503,
"train_batch_size": 32
},
{
"train_loss": 2.895704507827759,
"train_batch_size": 32
},
{
"train_loss": 1.0713893175125122,
"train_batch_size": 32
},
{
"valid_loss": 1.1811838150024414,
"valid_batch_size": 24
},
],
"epoch":
1,
"train_batch_count":
3,
"valid_batch_count":
1,
"train_loss":
1.9687392711639404,
"train_loss_best":
True,
"valid_loss":
1.1811838150024414,
"valid_loss_best":
True,
"train_trial_accuracy":
0.4791666666666667,
"train_trial_accuracy_best":
True,
"valid_trial_accuracy":
0.5,
"valid_trial_accuracy_best":
True,
},
{
"batches": [
{
"train_loss": 1.5488793849945068,
"train_batch_size": 32
},
{
"train_loss": 1.1174801588058472,
"train_batch_size": 32
},
{
"train_loss": 1.1525697708129883,
"train_batch_size": 32
},
{
"valid_loss": 2.202029228210449,
"valid_batch_size": 24
},
],
"epoch":
2,
"train_batch_count":
3,
"valid_batch_count":
1,
"train_loss":
1.2729764382044475,
"train_loss_best":
True,
"valid_loss":
2.202029228210449,
"valid_loss_best":
False,
"train_trial_accuracy":
0.5,
"train_trial_accuracy_best":
True,
"valid_trial_accuracy":
0.5,
"valid_trial_accuracy_best":
False,
},
{
"batches": [
{
"train_loss": 1.0049529075622559,
"train_batch_size": 32
},
{
"train_loss": 1.0266971588134766,
"train_batch_size": 32
},
{
"train_loss": 1.0799436569213867,
"train_batch_size": 32
},
{
"valid_loss": 1.0638500452041626,
"valid_batch_size": 24
},
],
"epoch":
3,
"train_batch_count":
3,
"valid_batch_count":
1,
"train_loss":
1.0371979077657063,
"train_loss_best":
True,
"valid_loss":
1.0638500452041626,
"valid_loss_best":
True,
"train_trial_accuracy":
0.5,
"train_trial_accuracy_best":
False,
"valid_trial_accuracy":
0.5,
"valid_trial_accuracy_best":
False,
},
{
"batches": [
{
"train_loss": 1.0052555799484253,
"train_batch_size": 32
},
{
"train_loss": 0.8479514718055725,
"train_batch_size": 32
},
{
"train_loss": 0.9589881300926208,
"train_batch_size": 32
},
{
"valid_loss": 0.8794112801551819,
"valid_batch_size": 24
},
],
"epoch":
4,
"train_batch_count":
3,
"valid_batch_count":
1,
"train_loss":
0.9373983939488729,
"train_loss_best":
True,
"valid_loss":
0.8794112801551819,
"valid_loss_best":
True,
"train_trial_accuracy":
0.5,
"train_trial_accuracy_best":
False,
"valid_trial_accuracy":
0.5,
"valid_trial_accuracy_best":
False,
},
]
history_without_dur = [{k: v
for k, v in h.items() if k != "dur"}
for h in clf.history]
assert_deep_allclose(expected, history_without_dur, atol=1e-3, rtol=1e-3)
def exp(subject_id):
import torch
test_subj = np.r_[subject_id]
print('test subj:' + str(test_subj))
#20% validation
train_size = int(0.9* len(splitted['session_T']))
test_size = len(splitted['session_T']) - train_size
# train_set, valid_set = torch.utils.data.random_split(splitted['session_T'], [train_size, test_size])
train_set = splitted['session_T']
test_set = splitted['session_E']
# model = Deep4Net(
# n_chans,
# n_classes,
# input_window_samples=input_window_samples,
# final_conv_length="auto",
# )
from torch.utils.data import Dataset, ConcatDataset
crop_size = 1000
# embedding_net = Deep4Net_origin(n_classes, n_chans, crop_size)
# model = FcClfNet(embedding_net)
model = ShallowFBCSPNet(
n_chans,
n_classes,
input_window_samples=input_window_samples,
final_conv_length='auto',
)
from braindecode.models.util import to_dense_prediction_model, get_output_shape
to_dense_prediction_model(model)
n_preds_per_input = get_output_shape(model, 22, input_window_samples)[2]
print("n_preds_per_input : ", n_preds_per_input)
print(model)
batch_size =8
epochs = 200
lr = 0.0625 * 0.01
weight_decay = 0
train_loader = torch.utils.data.DataLoader(train_set, batch_size=batch_size, shuffle=True)
# valid_loader = torch.utils.data.DataLoader(valid_set, batch_size=batch_size, shuffle=False)
test_loader = torch.utils.data.DataLoader(test_set, batch_size=batch_size, shuffle=False)
# Send model to GPU
if cuda:
model.cuda()
from torch.optim import lr_scheduler
import torch.optim as optim
import argparse
parser = argparse.ArgumentParser(description='cross subject domain adaptation')
parser.add_argument('--batch-size', type=int, default=50, metavar='N',
help='input batch size for training (default: 64)')
parser.add_argument('--test-batch-size', type=int, default=50, metavar='N',
help='input batch size for testing (default: 1000)')
parser.add_argument('--epochs', type=int, default=100, metavar='N',
help='number of epochs to train (default: 10)')
parser.add_argument('--lr', type=float, default=0.001, metavar='LR',
help='learning rate (default: 0.01)')
parser.add_argument('--momentum', type=float, default=0.5, metavar='M',
help='SGD momentum (default: 0.5)')
parser.add_argument('--no-cuda', action='store_true', default=False,
help='disables CUDA training')
parser.add_argument('--log-interval', type=int, default=10, metavar='N',
help='how many batches to wait before logging training status')
parser.add_argument('--save-model', action='store_true', default=True,
help='For Saving the current Model')
args = parser.parse_args()
args.gpuidx = 0
args.seed = 0
args.use_tensorboard = False
args.save_model = False
optimizer = optim.AdamW(model.parameters(), lr=0.01, weight_decay=0.5 * 0.001)
# scheduler = lr_scheduler.CosineAnnealingWarmRestarts(optimizer, T_0=10, T_mult=1)
scheduler = lr_scheduler.CosineAnnealingLR(optimizer, T_max=epochs-1)
import pandas as pd
results_columns = ['test_loss', 'test_accuracy']
df = pd.DataFrame(columns=results_columns)
for epochidx in range(1, epochs):
print(epochidx)
train_crop(10, model, device, train_loader,optimizer,scheduler,cuda, args.gpuidx)
test_loss, test_score = eval_crop(model, device, test_loader)
results = { 'test_loss': test_loss, 'test_accuracy': test_score}
df = df.append(results, ignore_index=True)
print(results)
return df
def create_example_model(n_channels,
n_classes,
window_len_samples,
kind='shallow',
cuda=False):
"""Create model, loss and optimizer.
Parameters
----------
n_channels : int
Number of channels in the input
n_times : int
Window length in the input
n_classes : int
Number of classes in the output
kind : str
'shallow' or 'deep'
cuda : bool
If True, move the model to a CUDA device.
Returns
-------
model : torch.nn.Module
Model to train.
loss :
Loss function
optimizer :
Optimizer
"""
if kind == 'shallow':
model = ShallowFBCSPNet(n_channels,
n_classes,
input_window_samples=window_len_samples,
n_filters_time=40,
filter_time_length=25,
n_filters_spat=40,
pool_time_length=75,
pool_time_stride=15,
final_conv_length='auto',
split_first_layer=True,
batch_norm=True,
batch_norm_alpha=0.1,
drop_prob=0.5)
elif kind == 'deep':
model = Deep4Net(n_channels,
n_classes,
input_window_samples=window_len_samples,
final_conv_length='auto',
n_filters_time=25,
n_filters_spat=25,
filter_time_length=10,
pool_time_length=3,
pool_time_stride=3,
n_filters_2=50,
filter_length_2=10,
n_filters_3=100,
filter_length_3=10,
n_filters_4=200,
filter_length_4=10,
first_pool_mode="max",
later_pool_mode="max",
drop_prob=0.5,
double_time_convs=False,
split_first_layer=True,
batch_norm=True,
batch_norm_alpha=0.1,
stride_before_pool=False)
else:
raise ValueError
if cuda:
model.cuda()
optimizer = optim.Adam(model.parameters())
loss = nn.NLLLoss()
return model, loss, optimizer
def test_eeg_classifier():
# 5,6,7,10,13,14 are codes for executed and imagined hands/feet
subject_id = 1
event_codes = [5, 6, 9, 10, 13, 14]
# This will download the files if you don't have them yet,
# and then return the paths to the files.
physionet_paths = mne.datasets.eegbci.load_data(subject_id,
event_codes,
update_path=False)
# Load each of the files
parts = [
mne.io.read_raw_edf(path,
preload=True,
stim_channel="auto",
verbose="WARNING") for path in physionet_paths
]
# Concatenate them
raw = concatenate_raws(parts)
# Find the events in this dataset
events, _ = mne.events_from_annotations(raw)
# Use only EEG channels
eeg_channel_inds = mne.pick_types(raw.info,
meg=False,
eeg=True,
stim=False,
eog=False,
exclude="bads")
# Extract trials, only using EEG channels
epoched = mne.Epochs(
raw,
events,
dict(hands=2, feet=3),
tmin=1,
tmax=4.1,
proj=False,
picks=eeg_channel_inds,
baseline=None,
preload=True,
)
# Convert data from volt to millivolt
# Pytorch expects float32 for input and int64 for labels.
X = (epoched.get_data() * 1e6).astype(np.float32)
y = (epoched.events[:, 2] - 2).astype(np.int64) # 2,3 -> 0,1
# Set if you want to use GPU
# You can also use torch.cuda.is_available() to determine if cuda is available on your machine.
cuda = False
set_random_seeds(seed=20170629, cuda=cuda)
# This will determine how many crops are processed in parallel
input_window_samples = 450
n_classes = 2
in_chans = X.shape[1]
# final_conv_length determines the size of the receptive field of the ConvNet
model = ShallowFBCSPNet(
in_chans=in_chans,
n_classes=n_classes,
input_window_samples=input_window_samples,
final_conv_length=12,
)
to_dense_prediction_model(model)
if cuda:
model.cuda()
# determine output size
test_input = np_to_var(
np.ones((2, in_chans, input_window_samples, 1), dtype=np.float32))
if cuda:
test_input = test_input.cuda()
out = model(test_input)
n_preds_per_input = out.cpu().data.numpy().shape[2]
train_set = create_from_X_y(X[:48],
y[:48],
drop_last_window=False,
window_size_samples=input_window_samples,
window_stride_samples=n_preds_per_input)
valid_set = create_from_X_y(X[48:60],
y[48:60],
drop_last_window=False,
window_size_samples=input_window_samples,
window_stride_samples=n_preds_per_input)
cropped_cb_train = CroppedTrialEpochScoring(
"accuracy",
name="train_trial_accuracy",
lower_is_better=False,
on_train=True,
)
cropped_cb_valid = CroppedTrialEpochScoring(
"accuracy",
on_train=False,
name="valid_trial_accuracy",
lower_is_better=False,
)
clf = EEGClassifier(
model,
criterion=CroppedLoss,
criterion__loss_function=nll_loss,
optimizer=optim.Adam,
train_split=predefined_split(valid_set),
batch_size=32,
callbacks=[
("train_trial_accuracy", cropped_cb_train),
("valid_trial_accuracy", cropped_cb_valid),
],
)
clf.fit(train_set, y=None, epochs=4)
expected = [{
'batches': [{
'train_batch_size': 32,
'train_loss': 1.9391239881515503
}, {
'train_batch_size': 32,
'train_loss': 2.895704507827759
}, {
'train_batch_size': 32,
'train_loss': 1.0713887214660645
}, {
'valid_batch_size': 24,
'valid_loss': 1.18110191822052
}],
'epoch':
1,
'train_batch_count':
3,
'train_loss':
1.9687390724817913,
'train_loss_best':
True,
'train_trial_accuracy':
0.4791666666666667,
'train_trial_accuracy_best':
True,
'valid_batch_count':
1,
'valid_loss':
1.18110191822052,
'valid_loss_best':
True,
'valid_trial_accuracy':
0.5,
'valid_trial_accuracy_best':
True
}, {
'batches': [{
'train_batch_size': 32,
'train_loss': 1.6741573810577393
}, {
'train_batch_size': 32,
'train_loss': 0.9984264373779297
}, {
'train_batch_size': 32,
'train_loss': 1.1340471506118774
}, {
'valid_batch_size': 24,
'valid_loss': 2.5375664234161377
}],
'epoch':
2,
'train_batch_count':
3,
'train_loss':
1.2688769896825154,
'train_loss_best':
True,
'train_trial_accuracy':
0.5,
'train_trial_accuracy_best':
True,
'valid_batch_count':
1,
'valid_loss':
2.5375664234161377,
'valid_loss_best':
False,
'valid_trial_accuracy':
0.5,
'valid_trial_accuracy_best':
False
}, {
'batches': [{
'train_batch_size': 32,
'train_loss': 0.8795645833015442
}, {
'train_batch_size': 32,
'train_loss': 1.0339491367340088
}, {
'train_batch_size': 32,
'train_loss': 1.19275963306427
}, {
'valid_batch_size': 24,
'valid_loss': 1.655737042427063
}],
'epoch':
3,
'train_batch_count':
3,
'train_loss':
1.0354244510332744,
'train_loss_best':
True,
'train_trial_accuracy':
0.5,
'train_trial_accuracy_best':
False,
'valid_batch_count':
1,
'valid_loss':
1.655737042427063,
'valid_loss_best':
False,
'valid_trial_accuracy':
0.5,
'valid_trial_accuracy_best':
False
}, {
'batches': [{
'train_batch_size': 32,
'train_loss': 1.1963350772857666
}, {
'train_batch_size': 32,
'train_loss': 0.8621770143508911
}, {
'train_batch_size': 32,
'train_loss': 1.099318265914917
}, {
'valid_batch_size': 24,
'valid_loss': 1.0293445587158203
}],
'epoch':
4,
'train_batch_count':
3,
'train_loss':
1.0526101191838582,
'train_loss_best':
False,
'train_trial_accuracy':
0.625,
'train_trial_accuracy_best':
True,
'valid_batch_count':
1,
'valid_loss':
1.0293445587158203,
'valid_loss_best':
True,
'valid_trial_accuracy':
0.25,
'valid_trial_accuracy_best':
False
}]
history_without_dur = [{k: v
for k, v in h.items() if k != "dur"}
for h in clf.history]
assert_deep_allclose(expected, history_without_dur, atol=1e-3, rtol=1e-3)
def test_trialwise_decoding():
# 5,6,7,10,13,14 are codes for executed and imagined hands/feet
subject_id = 1
event_codes = [5, 6, 9, 10, 13, 14]
# This will download the files if you don't have them yet,
# and then return the paths to the files.
physionet_paths = mne.datasets.eegbci.load_data(subject_id,
event_codes,
update_path=False)
# Load each of the files
parts = [
mne.io.read_raw_edf(path,
preload=True,
stim_channel="auto",
verbose="WARNING") for path in physionet_paths
]
# Concatenate them
raw = concatenate_raws(parts)
raw.apply_function(lambda x: x * 1000000)
# Find the events in this dataset
events, _ = mne.events_from_annotations(raw)
# Use only EEG channels
eeg_channel_inds = mne.pick_types(raw.info,
meg=False,
eeg=True,
stim=False,
eog=False,
exclude="bads")
# Extract trials, only using EEG channels
epoched = mne.Epochs(
raw,
events,
dict(hands=2, feet=3),
tmin=1,
tmax=4.1,
proj=False,
picks=eeg_channel_inds,
baseline=None,
preload=True,
)
ds = EpochsDataset(epoched)
train_set = Subset(ds, np.arange(60))
valid_set = Subset(ds, np.arange(60, len(ds)))
train_valid_split = predefined_split(valid_set)
cuda = False
if cuda:
device = 'cuda'
else:
device = 'cpu'
set_random_seeds(seed=20170629, cuda=cuda)
n_classes = 2
in_chans = train_set[0][0].shape[0]
input_window_samples = train_set[0][0].shape[1]
model = ShallowFBCSPNet(
in_chans=in_chans,
n_classes=n_classes,
input_window_samples=input_window_samples,
final_conv_length="auto",
)
if cuda:
model.cuda()
clf = EEGClassifier(
model,
cropped=False,
criterion=torch.nn.NLLLoss,
optimizer=torch.optim.Adam,
train_split=train_valid_split,
optimizer__lr=0.001,
batch_size=30,
callbacks=["accuracy"],
device=device,
)
clf.fit(train_set, y=None, epochs=6)
np.testing.assert_allclose(
clf.history[:, 'train_loss'],
np.array([
1.1114967465400696, 1.0180627405643463, 0.8020123243331909,
0.8934760391712189, 0.8401200771331787, 0.5898805856704712
]),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'valid_loss'],
np.array([
0.8467752933502197, 1.0855580568313599, 0.873993992805481,
0.8403236865997314, 0.8534432053565979, 0.8854812383651733
]),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'train_accuracy'],
np.array(
[0.7166666666666667, 0.6666666666666666, 0.8, 0.9, 0.95, 0.95]),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'valid_accuracy'],
np.array([
0.6, 0.5666666666666667, 0.5666666666666667, 0.5,
0.5333333333333333, 0.6333333333333333
]),
rtol=1e-4,
atol=1e-5,
)
def test_eeg_classifier():
# 5,6,7,10,13,14 are codes for executed and imagined hands/feet
subject_id = 1
event_codes = [5, 6, 9, 10, 13, 14]
# This will download the files if you don't have them yet,
# and then return the paths to the files.
physionet_paths = mne.datasets.eegbci.load_data(subject_id,
event_codes,
update_path=False)
# Load each of the files
parts = [
mne.io.read_raw_edf(path,
preload=True,
stim_channel="auto",
verbose="WARNING") for path in physionet_paths
]
# Concatenate them
raw = concatenate_raws(parts)
# Find the events in this dataset
events, _ = mne.events_from_annotations(raw)
# Use only EEG channels
eeg_channel_inds = mne.pick_types(raw.info,
meg=False,
eeg=True,
stim=False,
eog=False,
exclude="bads")
# Extract trials, only using EEG channels
epoched = mne.Epochs(
raw,
events,
dict(hands=2, feet=3),
tmin=1,
tmax=4.1,
proj=False,
picks=eeg_channel_inds,
baseline=None,
preload=True,
)
# Convert data from volt to millivolt
# Pytorch expects float32 for input and int64 for labels.
X = (epoched.get_data() * 1e6).astype(np.float32)
y = (epoched.events[:, 2] - 2).astype(np.int64) # 2,3 -> 0,1
# Set if you want to use GPU
# You can also use torch.cuda.is_available() to determine if cuda is available on your machine.
cuda = False
set_random_seeds(seed=20170629, cuda=cuda)
# This will determine how many crops are processed in parallel
input_time_length = 450
n_classes = 2
in_chans = X.shape[1]
# final_conv_length determines the size of the receptive field of the ConvNet
model = ShallowFBCSPNet(
in_chans=in_chans,
n_classes=n_classes,
input_time_length=input_time_length,
final_conv_length=12,
)
to_dense_prediction_model(model)
if cuda:
model.cuda()
# determine output size
test_input = np_to_var(
np.ones((2, in_chans, input_time_length, 1), dtype=np.float32))
if cuda:
test_input = test_input.cuda()
out = model(test_input)
n_preds_per_input = out.cpu().data.numpy().shape[2]
train_set = CroppedXyDataset(X[:60],
y=y[:60],
input_time_length=input_time_length,
n_preds_per_input=n_preds_per_input)
cropped_cb_train = CroppedTrialEpochScoring(
"accuracy",
name="train_trial_accuracy",
lower_is_better=False,
on_train=True,
)
cropped_cb_valid = CroppedTrialEpochScoring(
"accuracy",
on_train=False,
name="valid_trial_accuracy",
lower_is_better=False,
)
clf = EEGClassifier(
model,
criterion=CroppedNLLLoss,
optimizer=optim.Adam,
train_split=TrainTestSplit(
train_size=0.8,
input_time_length=input_time_length,
n_preds_per_input=n_preds_per_input,
),
batch_size=32,
callbacks=[
("train_trial_accuracy", cropped_cb_train),
("valid_trial_accuracy", cropped_cb_valid),
],
)
clf.fit(train_set.X, train_set.y, epochs=4)
expected = [
{
"batches": [
{
"train_loss": 2.0750882625579834,
"train_batch_size": 32
},
{
"train_loss": 3.09424090385437,
"train_batch_size": 32
},
{
"train_loss": 1.079931378364563,
"train_batch_size": 32
},
{
"valid_loss": 2.3208131790161133,
"valid_batch_size": 24
},
],
"epoch":
1,
"train_batch_count":
3,
"valid_batch_count":
1,
"train_loss":
2.083086848258972,
"train_loss_best":
True,
"valid_loss":
2.3208131790161133,
"valid_loss_best":
True,
"train_trial_accuracy":
0.5,
"train_trial_accuracy_best":
True,
"valid_trial_accuracy":
0.5,
"valid_trial_accuracy_best":
True,
},
{
"batches": [
{
"train_loss": 1.827332615852356,
"train_batch_size": 32
},
{
"train_loss": 1.4135494232177734,
"train_batch_size": 32
},
{
"train_loss": 1.1295170783996582,
"train_batch_size": 32
},
{
"valid_loss": 1.4291356801986694,
"valid_batch_size": 24
},
],
"epoch":
2,
"train_batch_count":
3,
"valid_batch_count":
1,
"train_loss":
1.4567997058232625,
"train_loss_best":
True,
"valid_loss":
1.4291356801986694,
"valid_loss_best":
True,
"train_trial_accuracy":
0.5,
"train_trial_accuracy_best":
False,
"valid_trial_accuracy":
0.5,
"valid_trial_accuracy_best":
False,
},
{
"batches": [
{
"train_loss": 1.1495535373687744,
"train_batch_size": 32
},
{
"train_loss": 2.356320381164551,
"train_batch_size": 32
},
{
"train_loss": 0.9548418521881104,
"train_batch_size": 32
},
{
"valid_loss": 2.248246908187866,
"valid_batch_size": 24
},
],
"epoch":
3,
"train_batch_count":
3,
"valid_batch_count":
1,
"train_loss":
1.4869052569071453,
"train_loss_best":
False,
"valid_loss":
2.248246908187866,
"valid_loss_best":
False,
"train_trial_accuracy":
0.5,
"train_trial_accuracy_best":
False,
"valid_trial_accuracy":
0.5,
"valid_trial_accuracy_best":
False,
},
{
"batches": [
{
"train_loss": 1.2157528400421143,
"train_batch_size": 32
},
{
"train_loss": 1.1182057857513428,
"train_batch_size": 32
},
{
"train_loss": 0.9163083434104919,
"train_batch_size": 32
},
{
"valid_loss": 0.9732739925384521,
"valid_batch_size": 24
},
],
"epoch":
4,
"train_batch_count":
3,
"valid_batch_count":
1,
"train_loss":
1.083422323067983,
"train_loss_best":
True,
"valid_loss":
0.9732739925384521,
"valid_loss_best":
True,
"train_trial_accuracy":
0.5,
"train_trial_accuracy_best":
False,
"valid_trial_accuracy":
0.5,
"valid_trial_accuracy_best":
False,
},
]
history_without_dur = [{k: v
for k, v in h.items() if k != "dur"}
for h in clf.history]
assert_deep_allclose(history_without_dur, expected, atol=1e-3, rtol=1e-3)
def test_post_epoch_train_scoring():
cuda = False
set_random_seeds(seed=20170629, cuda=cuda)
n_classes = 2
class EEGDataSet(Dataset):
def __init__(self, X, y):
self.X = X
if self.X.ndim == 3:
self.X = self.X[:, :, :, None]
self.y = y
def __len__(self):
return len(self.X)
def __getitem__(self, idx):
return self.X[idx], self.y[idx]
X, y = sklearn.datasets.make_classification(
40, (3 * 100), n_informative=3 * 50, n_classes=2
)
X = X.reshape(40, 3, 100).astype(np.float32)
in_chans = X.shape[1]
train_set = EEGDataSet(X, y)
class TestCallback(Callback):
def on_epoch_end(self, net, *args, **kwargs):
preds = net.predict(train_set.X)
y_true = train_set.y
np.testing.assert_allclose(
clf.history[-1]["train_f1"],
f1_score(y_true, preds),
rtol=1e-4,
atol=1e-4,
)
np.testing.assert_allclose(
clf.history[-1]["train_acc"],
accuracy_score(y_true, preds),
rtol=1e-4,
atol=1e-4,
)
set_random_seeds(20200114, cuda)
# final_conv_length = auto ensures
# we only get a single output in the time dimension
model = ShallowFBCSPNet(
in_chans=in_chans,
n_classes=n_classes,
input_window_samples=train_set.X.shape[2],
pool_time_stride=1,
pool_time_length=2,
final_conv_length="auto",
)
if cuda:
model.cuda()
clf = EEGClassifier(
model,
criterion=torch.nn.NLLLoss,
optimizer=optim.AdamW,
train_split=None,
optimizer__lr=0.0625 * 0.01,
optimizer__weight_decay=0,
batch_size=64,
callbacks=[
(
"train_accuracy",
PostEpochTrainScoring(
"accuracy", lower_is_better=False, name="train_acc"
),
),
(
"train_f1_score",
PostEpochTrainScoring(
"f1", lower_is_better=False, name="train_f1"
),
),
("test_callback", TestCallback()),
],
)
clf.fit(train_set, y=None, epochs=4)
def exp(subject_id):
import torch
input_window_samples = 1000
cuda = torch.cuda.is_available() # check if GPU is available, if True chooses to use it
device = 'cuda:0' if cuda else 'cpu'
if cuda:
torch.backends.cudnn.deterministic = True
torch.backends.cudnn.benchmark = False
seed = 20190706 # random seed to make results reproducible
# Set random seed to be able to reproduce results
random.seed(seed)
torch.manual_seed(seed)
if cuda:
torch.cuda.manual_seed_all(seed)
np.random.seed(seed)
n_classes = 4
PATH = '../datasets/'
with open(PATH + 'bcic_datasets_[0,49].pkl', 'rb') as f:
data = pickle.load(f)
import torch
print('subject:' + str(subject_id))
#make train test
tr = []
val =[]
test_train_split = 0.5
dataset= data[subject_id]
dataset_size = len(dataset)
indices = list(range(dataset_size))
test_split = int(np.floor(test_train_split * dataset_size))
train_indices, test_indices = indices[:test_split], indices[test_split:]
np.random.shuffle(train_indices)
#분석
sample_data = data[0].dataset
sample_data.psd()
from mne.viz import plot_epochs_image
import mne
plot_epochs_image(sample_data, picks=['C3','C4'])
label = sample_data.read_label()
sample_data.plot_projs_topomap()
train_sampler = SubsetRandomSampler(train_indices)
test_sampler = SubsetRandomSampler(test_indices)
from braindecode.models import ShallowFBCSPNet
model = ShallowFBCSPNet(
22,
n_classes,
input_window_samples=input_window_samples,
final_conv_length=30,
)
from braindecode.models.util import to_dense_prediction_model, get_output_shape
to_dense_prediction_model(model)
n_preds_per_input = get_output_shape(model, 22, input_window_samples)[2]
print("n_preds_per_input : ", n_preds_per_input)
print(model)
# crop_size =1000
#
#
#
#
# model = ShallowNet_dense(n_classes, 22, crop_size)
#
# print(model)
epochs = 100
# For deep4 they should be:
lr = 1 * 0.01
weight_decay = 0.5 * 0.001
batch_size = 8
train_set = torch.utils.data.Subset(dataset,indices= train_indices)
test_set = torch.utils.data.Subset(dataset,indices= test_indices)
train_loader = torch.utils.data.DataLoader(train_set, batch_size=batch_size, shuffle=True)
test_loader = torch.utils.data.DataLoader(test_set, batch_size=batch_size, shuffle=False)
# Send model to GPU
if cuda:
model.cuda(device=device)
from torch.optim import lr_scheduler
import torch.optim as optim
import argparse
parser = argparse.ArgumentParser(description='cross subject domain adaptation')
parser.add_argument('--batch-size', type=int, default=50, metavar='N',
help='input batch size for training (default: 64)')
parser.add_argument('--test-batch-size', type=int, default=50, metavar='N',
help='input batch size for testing (default: 1000)')
parser.add_argument('--epochs', type=int, default=100, metavar='N',
help='number of epochs to train (default: 10)')
parser.add_argument('--lr', type=float, default=0.001, metavar='LR',
help='learning rate (default: 0.01)')
parser.add_argument('--momentum', type=float, default=0.5, metavar='M',
help='SGD momentum (default: 0.5)')
parser.add_argument('--no-cuda', action='store_true', default=False,
help='disables CUDA training')
parser.add_argument('--log-interval', type=int, default=10, metavar='N',
help='how many batches to wait before logging training status')
parser.add_argument('--save-model', action='store_true', default=True,
help='For Saving the current Model')
args = parser.parse_args()
args.gpuidx = 0
args.seed = 0
args.use_tensorboard = False
args.save_model = False
lr = 0.0625 * 0.01
weight_decay = 0
optimizer = optim.AdamW(model.parameters(), lr=lr, weight_decay=weight_decay)
# scheduler = lr_scheduler.CosineAnnealingLR(optimizer, T_max=200)
scheduler = lr_scheduler.CosineAnnealingLR(optimizer, T_max = epochs-1)
#
# #test lr
# lr = []
# for i in range(200):
# scheduler.step()
# lr.append(scheduler.get_lr())
#
# import matplotlib.pyplot as plt
# plt.plot(lr)
import pandas as pd
results_columns = ['test_loss', 'test_accuracy']
df = pd.DataFrame(columns=results_columns)
for epochidx in range(1, epochs):
print(epochidx)
train_crop(10, model, device, train_loader,optimizer,scheduler,cuda, args.gpuidx)
test_loss, test_score = eval_crop(model, device, test_loader)
results = {'test_loss': test_loss, 'test_accuracy': test_score}
df = df.append(results, ignore_index=True)
print(results)
return df
def test_cropped_decoding():
# 5,6,7,10,13,14 are codes for executed and imagined hands/feet
subject_id = 1
event_codes = [5, 6, 9, 10, 13, 14]
# This will download the files if you don't have them yet,
# and then return the paths to the files.
physionet_paths = mne.datasets.eegbci.load_data(
subject_id, event_codes, update_path=False
)
# Load each of the files
parts = [
mne.io.read_raw_edf(
path, preload=True, stim_channel="auto", verbose="WARNING"
)
for path in physionet_paths
]
# Concatenate them
raw = concatenate_raws(parts)
# Find the events in this dataset
events, _ = mne.events_from_annotations(raw)
# Use only EEG channels
eeg_channel_inds = mne.pick_types(
raw.info, meg=False, eeg=True, stim=False, eog=False, exclude="bads"
)
# Extract trials, only using EEG channels
epoched = mne.Epochs(
raw,
events,
dict(hands=2, feet=3),
tmin=1,
tmax=4.1,
proj=False,
picks=eeg_channel_inds,
baseline=None,
preload=True,
)
# Convert data from volt to millivolt
# Pytorch expects float32 for input and int64 for labels.
X = (epoched.get_data() * 1e6).astype(np.float32)
y = (epoched.events[:, 2] - 2).astype(np.int64) # 2,3 -> 0,1
# Set if you want to use GPU
# You can also use torch.cuda.is_available() to determine if cuda is available on your machine.
cuda = False
set_random_seeds(seed=20170629, cuda=cuda)
# This will determine how many crops are processed in parallel
input_time_length = 450
n_classes = 2
in_chans = X.shape[1]
# final_conv_length determines the size of the receptive field of the ConvNet
model = ShallowFBCSPNet(
in_chans=in_chans,
n_classes=n_classes,
input_time_length=input_time_length,
final_conv_length=12,
)
to_dense_prediction_model(model)
if cuda:
model.cuda()
# Perform forward pass to determine how many outputs per input
n_preds_per_input = get_output_shape(model, in_chans, input_time_length)[2]
train_set = CroppedXyDataset(X[:60], y[:60],
input_time_length=input_time_length,
n_preds_per_input=n_preds_per_input)
valid_set = CroppedXyDataset(X[60:], y=y[60:],
input_time_length=input_time_length,
n_preds_per_input=n_preds_per_input)
train_split = predefined_split(valid_set)
clf = EEGClassifier(
model,
cropped=True,
criterion=CroppedLoss,
criterion__loss_function=torch.nn.functional.nll_loss,
optimizer=optim.Adam,
train_split=train_split,
batch_size=32,
callbacks=['accuracy'],
)
clf.fit(train_set, y=None, epochs=4)
np.testing.assert_allclose(
clf.history[:, 'train_loss'],
np.array(
[
1.455306,
1.455934,
1.210563,
1.065806
]
),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'valid_loss'],
np.array(
[
2.547288,
1.51785,
1.394036,
1.064355
]
),
rtol=1e-4,
atol=1e-4,
)
np.testing.assert_allclose(
clf.history[:, 'train_accuracy'],
np.array(
[
0.5,
0.5,
0.5,
0.533333
]
),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'valid_accuracy'],
np.array(
[
0.533333,
0.466667,
0.533333,
0.5
]
),
rtol=1e-4,
atol=1e-5,
)
def test_cropped_decoding():
# 5,6,7,10,13,14 are codes for executed and imagined hands/feet
subject_id = 1
event_codes = [5, 6, 9, 10, 13, 14]
# This will download the files if you don't have them yet,
# and then return the paths to the files.
physionet_paths = mne.datasets.eegbci.load_data(subject_id,
event_codes,
update_path=True)
# Load each of the files
parts = [
mne.io.read_raw_edf(path,
preload=True,
stim_channel='auto',
verbose='WARNING') for path in physionet_paths
]
# Concatenate them
raw = concatenate_raws(parts)
# Find the events in this dataset
events, _ = mne.events_from_annotations(raw)
# Use only EEG channels
eeg_channel_inds = mne.pick_types(raw.info,
meg=False,
eeg=True,
stim=False,
eog=False,
exclude='bads')
# Extract trials, only using EEG channels
epoched = mne.Epochs(raw,
events,
dict(hands=2, feet=3),
tmin=1,
tmax=4.1,
proj=False,
picks=eeg_channel_inds,
baseline=None,
preload=True)
# Convert data from volt to millivolt
# Pytorch expects float32 for input and int64 for labels.
X = (epoched.get_data() * 1e6).astype(np.float32)
y = (epoched.events[:, 2] - 2).astype(np.int64) # 2,3 -> 0,1
train_set = SignalAndTarget(X[:60], y=y[:60])
test_set = SignalAndTarget(X[60:], y=y[60:])
# Set if you want to use GPU
# You can also use torch.cuda.is_available() to determine if cuda is available on your machine.
cuda = False
set_random_seeds(seed=20170629, cuda=cuda)
# This will determine how many crops are processed in parallel
input_time_length = 450
n_classes = 2
in_chans = train_set.X.shape[1]
# final_conv_length determines the size of the receptive field of the ConvNet
model = ShallowFBCSPNet(in_chans=in_chans,
n_classes=n_classes,
input_time_length=input_time_length,
final_conv_length=12).create_network()
to_dense_prediction_model(model)
if cuda:
model.cuda()
optimizer = optim.Adam(model.parameters())
# determine output size
test_input = np_to_var(
np.ones((2, in_chans, input_time_length, 1), dtype=np.float32))
if cuda:
test_input = test_input.cuda()
out = model(test_input)
n_preds_per_input = out.cpu().data.numpy().shape[2]
print("{:d} predictions per input/trial".format(n_preds_per_input))
iterator = CropsFromTrialsIterator(batch_size=32,
input_time_length=input_time_length,
n_preds_per_input=n_preds_per_input)
losses = []
accuracies = []
for i_epoch in range(4):
# Set model to training mode
model.train()
for batch_X, batch_y in iterator.get_batches(train_set, shuffle=False):
net_in = np_to_var(batch_X)
if cuda:
net_in = net_in.cuda()
net_target = np_to_var(batch_y)
if cuda:
net_target = net_target.cuda()
# Remove gradients of last backward pass from all parameters
optimizer.zero_grad()
outputs = model(net_in)
# Mean predictions across trial
# Note that this will give identical gradients to computing
# a per-prediction loss (at least for the combination of log softmax activation
# and negative log likelihood loss which we are using here)
outputs = th.mean(outputs, dim=2, keepdim=False)
loss = F.nll_loss(outputs, net_target)
loss.backward()
optimizer.step()
# Print some statistics each epoch
model.eval()
print("Epoch {:d}".format(i_epoch))
for setname, dataset in (('Train', train_set), ('Test', test_set)):
# Collect all predictions and losses
all_preds = []
all_losses = []
batch_sizes = []
for batch_X, batch_y in iterator.get_batches(dataset,
shuffle=False):
net_in = np_to_var(batch_X)
if cuda:
net_in = net_in.cuda()
net_target = np_to_var(batch_y)
if cuda:
net_target = net_target.cuda()
outputs = model(net_in)
all_preds.append(var_to_np(outputs))
outputs = th.mean(outputs, dim=2, keepdim=False)
loss = F.nll_loss(outputs, net_target)
loss = float(var_to_np(loss))
all_losses.append(loss)
batch_sizes.append(len(batch_X))
# Compute mean per-input loss
loss = np.mean(
np.array(all_losses) * np.array(batch_sizes) /
np.mean(batch_sizes))
print("{:6s} Loss: {:.5f}".format(setname, loss))
losses.append(loss)
# Assign the predictions to the trials
preds_per_trial = compute_preds_per_trial_from_crops(
all_preds, input_time_length, dataset.X)
# preds per trial are now trials x classes x timesteps/predictions
# Now mean across timesteps for each trial to get per-trial predictions
meaned_preds_per_trial = np.array(
[np.mean(p, axis=1) for p in preds_per_trial])
predicted_labels = np.argmax(meaned_preds_per_trial, axis=1)
accuracy = np.mean(predicted_labels == dataset.y)
accuracies.append(accuracy * 100)
print("{:6s} Accuracy: {:.1f}%".format(setname, accuracy * 100))
np.testing.assert_allclose(np.array(losses),
np.array([
1.31657708, 1.73548156, 1.02950428,
1.43932164, 0.78677772, 1.12382019,
0.55920881, 0.87277424
]),
rtol=1e-4,
atol=1e-5)
np.testing.assert_allclose(np.array(accuracies),
np.array([
50., 46.66666667, 50., 46.66666667, 50.,
46.66666667, 66.66666667, 50.
]),
rtol=1e-4,
atol=1e-5)
final_conv_length=1,
)
optimizer_lr = 0.01
optimizer_weight_decay = 0.0005
else:
raise ValueError(f'{model_name} unknown')
new_model = torch.nn.Sequential()
for name, module_ in model.named_children():
if "softmax" in name:
continue
new_model.add_module(name, module_)
model = new_model
if cuda:
model.cuda()
to_dense_prediction_model(model)
n_preds_per_input = get_output_shape(model, n_chans, input_window_samples)[2]
train_set, valid_set = create_compatible_dataset('./data/BCICIV_4_mat/sub1_comp.mat')
# dataset = create_fixed_length_windows(
# dataset,
# start_offset_samples=0,
# stop_offset_samples=0,
# window_size_samples=input_window_samples,
# window_stride_samples=n_preds_per_input,
# drop_last_window=False,
# drop_bad_windows=True,
# )
def test_trialwise_decoding():
# 5,6,7,10,13,14 are codes for executed and imagined hands/feet
subject_id = 1
event_codes = [5, 6, 9, 10, 13, 14]
# This will download the files if you don't have them yet,
# and then return the paths to the files.
physionet_paths = mne.datasets.eegbci.load_data(subject_id,
event_codes,
update_path=False)
# Load each of the files
parts = [
mne.io.read_raw_edf(path,
preload=True,
stim_channel="auto",
verbose="WARNING") for path in physionet_paths
]
# Concatenate them
raw = concatenate_raws(parts)
raw.apply_function(lambda x: x * 1000000)
# Find the events in this dataset
events, _ = mne.events_from_annotations(raw)
# Use only EEG channels
eeg_channel_inds = mne.pick_types(raw.info,
meg=False,
eeg=True,
stim=False,
eog=False,
exclude="bads")
# Extract trials, only using EEG channels
epoched = mne.Epochs(
raw,
events,
dict(hands=2, feet=3),
tmin=1,
tmax=4.1,
proj=False,
picks=eeg_channel_inds,
baseline=None,
preload=True,
)
ds = EpochsDataset(epoched)
train_set = Subset(ds, np.arange(60))
valid_set = Subset(ds, np.arange(60, len(ds)))
train_valid_split = predefined_split(valid_set)
cuda = False
if cuda:
device = 'cuda'
else:
device = 'cpu'
set_random_seeds(seed=20170629, cuda=cuda)
n_classes = 2
in_chans = train_set[0][0].shape[0]
input_window_samples = train_set[0][0].shape[1]
model = ShallowFBCSPNet(
in_chans=in_chans,
n_classes=n_classes,
input_window_samples=input_window_samples,
final_conv_length="auto",
)
if cuda:
model.cuda()
clf = EEGClassifier(
model,
cropped=False,
criterion=torch.nn.NLLLoss,
optimizer=torch.optim.Adam,
train_split=train_valid_split,
optimizer__lr=0.001,
batch_size=30,
callbacks=["accuracy"],
device=device,
)
clf.fit(train_set, y=None, epochs=6)
np.testing.assert_allclose(
clf.history[:, 'train_loss'],
np.array([1.623811, 1.141197, 0.730361, 0.5994, 0.738884, 0.419241]),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'valid_loss'],
np.array([
1.958356261253357, 0.8494758009910583, 0.9321595430374146,
0.8126973509788513, 0.7426613569259644, 0.7547585368156433
]),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'train_accuracy'],
np.array([0.5, 0.8166666666666667, 0.7, 0.8, 0.8666666666666667, 0.9]),
rtol=1e-4,
atol=1e-5,
)
np.testing.assert_allclose(
clf.history[:, 'valid_accuracy'],
np.array([
0.4666666666666667,
0.6,
0.5,
0.5666666666666667,
0.6,
0.6,
]),
rtol=1e-4,
atol=1e-5,
)
