def test_make_fixed_length_events():
"""Test making events of a fixed length
"""
raw = io.Raw(raw_fname)
events = make_fixed_length_events(raw, id=1)
assert_true(events.shape[1], 3)
tmin, tmax = raw.times[[0, -1]]
duration = tmax - tmin
events = make_fixed_length_events(raw, 1, tmin, tmax, duration)
assert_equal(events.shape[0], 1)
def test_make_fixed_length_events():
"""Test making events of a fixed length."""
raw = read_raw_fif(raw_fname)
events = make_fixed_length_events(raw, id=1)
assert events.shape[1] == 3
events_zero = make_fixed_length_events(raw, 1, first_samp=False)
assert_equal(events_zero[0, 0], 0)
assert_array_equal(events_zero[:, 0], events[:, 0] - raw.first_samp)
# With limits
tmin, tmax = raw.times[[0, -1]]
duration = tmax - tmin
events = make_fixed_length_events(raw, 1, tmin, tmax, duration)
assert_equal(events.shape[0], 1)
# With bad limits (no resulting events)
pytest.raises(ValueError, make_fixed_length_events, raw, 1,
tmin, tmax - 1e-3, duration)
# not raw, bad id or duration
pytest.raises(TypeError, make_fixed_length_events, raw, 2.3)
pytest.raises(TypeError, make_fixed_length_events, 'not raw', 2)
pytest.raises(TypeError, make_fixed_length_events, raw, 23, tmin, tmax,
'abc')
# Let's try some ugly sample rate/sample count combos
data = np.random.RandomState(0).randn(1, 27768)
# This breaks unless np.round() is used in make_fixed_length_events
info = create_info(1, 155.4499969482422)
raw = RawArray(data, info)
events = make_fixed_length_events(raw, 1, duration=raw.times[-1])
assert events[0, 0] == 0
assert len(events) == 1
# Without use_rounding=True this breaks
raw = RawArray(data[:, :21216], info)
events = make_fixed_length_events(raw, 1, duration=raw.times[-1])
assert events[0, 0] == 0
assert len(events) == 1
# Make sure it gets used properly by compute_raw_covariance
cov = compute_raw_covariance(raw, tstep=None)
expected = np.cov(data[:, :21216])
np.testing.assert_allclose(cov['data'], expected, atol=1e-12)
# overlaps
events = make_fixed_length_events(raw, 1, duration=1)
assert len(events) == 136
events_ol = make_fixed_length_events(raw, 1, duration=1, overlap=0.5)
assert len(events_ol) == 271
events_ol_2 = make_fixed_length_events(raw, 1, duration=1, overlap=0.9)
assert len(events_ol_2) == 1355
assert_array_equal(events_ol_2[:, 0], np.unique(events_ol_2[:, 0]))
with pytest.raises(ValueError, match='overlap must be'):
make_fixed_length_events(raw, 1, duration=1, overlap=1.1)
def test_make_fixed_length_events():
"""Test making events of a fixed length"""
raw = io.read_raw_fif(raw_fname)
events = make_fixed_length_events(raw, id=1)
assert_true(events.shape[1], 3)
events_zero = make_fixed_length_events(raw, 1, first_samp=False)
assert_equal(events_zero[0, 0], 0)
assert_array_equal(events_zero[:, 0], events[:, 0] - raw.first_samp)
# With limits
tmin, tmax = raw.times[[0, -1]]
duration = tmax - tmin
events = make_fixed_length_events(raw, 1, tmin, tmax, duration)
assert_equal(events.shape[0], 1)
# With bad limits (no resulting events)
assert_raises(ValueError, make_fixed_length_events, raw, 1,
tmin, tmax - 1e-3, duration)
def test_cov_ctf():
"""Test basic cov computation on ctf data with/without compensation."""
raw = read_raw_ctf(ctf_fname).crop(0., 2.).load_data()
events = make_fixed_length_events(raw, 99999)
assert len(events) == 2
ch_names = [raw.info['ch_names'][pick]
for pick in pick_types(raw.info, meg=True, eeg=False,
ref_meg=False)]
for comp in [0, 1]:
raw.apply_gradient_compensation(comp)
epochs = Epochs(raw, events, None, -0.2, 0.2, preload=True)
with pytest.warns(RuntimeWarning, match='Too few samples'):
noise_cov = compute_covariance(epochs, tmax=0.,
method=['empirical'])
prepare_noise_cov(noise_cov, raw.info, ch_names)
raw.apply_gradient_compensation(0)
epochs = Epochs(raw, events, None, -0.2, 0.2, preload=True)
with pytest.warns(RuntimeWarning, match='Too few samples'):
noise_cov = compute_covariance(epochs, tmax=0., method=['empirical'])
raw.apply_gradient_compensation(1)
# TODO This next call in principle should fail.
prepare_noise_cov(noise_cov, raw.info, ch_names)
# make sure comps matrices was not removed from raw
assert raw.info['comps'], 'Comps matrices removed'
def raw_epochs_events():
"""Create raw, epochs, and events for tests."""
raw = read_raw_fif(raw_fname).set_eeg_reference(projection=True).crop(0, 3)
raw = maxwell_filter(raw, regularize=None) # heavily reduce the rank
assert raw.info['bads'] == [] # no bads
events = make_fixed_length_events(raw)
epochs = Epochs(raw, events, tmin=-0.2, tmax=0, preload=True)
return (raw, epochs, events)
def test_tfr_ctf():
"""Test that TFRs can be calculated on CTF data."""
raw = read_raw_fif(raw_ctf_fname).crop(0, 1)
raw.apply_gradient_compensation(3)
events = mne.make_fixed_length_events(raw, duration=0.5)
epochs = mne.Epochs(raw, events)
for method in (tfr_multitaper, tfr_morlet):
method(epochs, [10], 1) # smoke test
def test_stockwell_ctf():
"""Test that Stockwell can be calculated on CTF data."""
raw = read_raw_fif(raw_ctf_fname)
raw.apply_gradient_compensation(3)
events = make_fixed_length_events(raw, duration=0.5)
evoked = Epochs(raw, events, tmin=-0.2, tmax=0.3, decim=10,
preload=True, verbose='error').average()
tfr_stockwell(evoked, verbose='error') # smoke test
def raw_epochs_events():
"""Create raw, epochs, and events for tests."""
raw = read_raw_fif(raw_fname).set_eeg_reference(projection=True).crop(0, 3)
raw = maxwell_filter(raw, regularize=None) # heavily reduce the rank
assert raw.info['bads'] == [] # no bads
events = make_fixed_length_events(raw)
epochs = Epochs(raw, events, tmin=-0.2, tmax=0, preload=True)
return (raw, epochs, events)
def test_tfr_ctf():
"""Test that TFRs can be calculated on CTF data."""
raw = read_raw_fif(raw_ctf_fname).crop(0, 1)
raw.apply_gradient_compensation(3)
events = mne.make_fixed_length_events(raw, duration=0.5)
epochs = mne.Epochs(raw, events)
for method in (tfr_multitaper, tfr_morlet):
method(epochs, [10], 1) # smoke test
def test_stockwell_ctf():
"""Test that Stockwell can be calculated on CTF data."""
raw = read_raw_fif(raw_ctf_fname)
raw.apply_gradient_compensation(3)
events = make_fixed_length_events(raw, duration=0.5)
evoked = Epochs(raw, events, tmin=-0.2, tmax=0.3, decim=10,
preload=True, verbose='error').average()
tfr_stockwell(evoked, verbose='error') # smoke test
def import_ECoG_rps(
datadir,
filename,
finger,
duration,
overlap,
normalize_input=True,
y_measure="mean",
):
# TODO add finger choice dict
path = "".join([datadir, filename])
if os.path.exists(path):
dataset = sio.loadmat(path)
X = dataset["train_data"].astype(np.float).T
assert (finger >= 0 and
finger < 5), "Finger input not valid, range value from 0 to 4."
y = dataset["train_dg"][:, finger] #
raw = create_raw(X, y, X.shape[0], sampling_rate=1000)
# Generate fixed length events.
events = mne.make_fixed_length_events(raw,
duration=duration,
overlap=overlap)
# Notch filter out some specific noisy bands
raw.notch_filter([50, 100])
# Band pass the input data
raw.filter(l_freq=1.0, h_freq=70)
epochs = mne.Epochs(raw,
events,
tmin=0.0,
tmax=duration,
baseline=(0, 0),
decim=2)
X = epochs.get_data()[:, :-1, :]
y = epochs.get_data()[:, -1, :]
bands = [(1, 4), (4, 8), (8, 10), (10, 13), (13, 30), (30, 70)]
bp = bandpower_multi(X,
fs=epochs.info["sfreq"],
bands=bands,
relative=True)
# Normalize data
if normalize_input:
X = standard_scaling(X, scalings="mean", log=False)
# Pick the y vales per each hand
y = y_reshape(np.expand_dims(y, axis=1), measure=y_measure)
print(
"The input data are of shape: {}, the corresponding y shape (filtered to 1 finger) is: {}"
.format(X.shape, y.shape))
return X, y, bp
else:
print("No such file '{}'".format(path), file=sys.stderr)
def compute_features(raw,
duration=60.,
shift=10.,
n_fft=512,
n_overlap=256,
fs=63.0,
fmin=0,
fmax=30,
fbands={'alpha': (8.0, 12.0)},
clean_func=lambda x: x,
n_jobs=1):
events = mne.make_fixed_length_events(raw,
id=3000,
start=0,
duration=shift,
stop=raw.times[-1] - duration)
epochs = mne.Epochs(raw,
events,
event_id=3000,
tmin=0,
tmax=duration,
proj=True,
baseline=None,
reject=None,
preload=True,
decim=1)
epochs_clean = clean_func(epochs)
clean_events = events[epochs_clean.selection]
psds_clean, freqs = mne.time_frequency.psd_welch(epochs_clean,
fmin=fmin,
fmax=fmax,
n_fft=n_fft,
n_overlap=n_overlap,
average='mean',
picks=None)
psds = trim_mean(psds_clean, 0.25, axis=0)
covs = _compute_covs(raw, clean_events, fbands, duration)
xfreqcovs, xfreqcorrs = _compute_xfreq_covs(epochs_clean, fbands)
cospcovs = _compute_cosp_covs(epochs_clean, n_fft, n_overlap, fmin, fmax,
fs)
features = {
'psds': psds,
'freqs': freqs,
'covs': covs,
'xfreqcovs': xfreqcovs,
'xfreqcorrs': xfreqcorrs,
'cospcovs': cospcovs
}
res = dict(n_epochs=len(events),
n_good_epochs=len(epochs),
n_clean_epochs=len(epochs_clean))
return features, res
def test_ctf_plotting():
"""Test CTF topomap plotting."""
raw = read_raw_fif(ctf_fname, preload=True)
events = make_fixed_length_events(raw, duration=0.01)
assert len(events) > 10
evoked = Epochs(raw, events, tmin=0, tmax=0.01, baseline=None).average()
assert get_current_comp(evoked.info) == 3
# smoke test that compensation does not matter
evoked.plot_topomap(time_unit='s')
def epoch_condition(raw, cat='Rest', tmin=-0.5, tmax=1.75):
"""
Epoch condition specific raw object (raw can be hfb or lfp)
"""
condition = VisualClassifier()
if cat == 'Rest':
events_1 = mne.make_fixed_length_events(raw,
id=32,
start=100,
stop=156,
duration=2,
first_samp=False,
overlap=0.0)
events_2 = mne.make_fixed_length_events(raw,
id=32,
start=300,
stop=356,
duration=2,
first_samp=False,
overlap=0.0)
events = np.concatenate((events_1, events_2))
rest_id = {'Rest': 32}
# epoch
epochs = mne.Epochs(raw,
events,
event_id=rest_id,
tmin=tmin,
tmax=tmax,
baseline=None,
preload=True)
else:
stim_events, stim_events_id = mne.events_from_annotations(raw)
condition_id = condition.extract_stim_id(stim_events_id, cat=cat)
epochs = mne.Epochs(raw,
stim_events,
event_id=stim_events_id,
tmin=tmin,
tmax=tmax,
baseline=None,
preload=True)
epochs = epochs[condition_id]
events = epochs.events
return epochs, events
def create_epochs(raw_data, duration=1):
"""
Chops the RawArray onto Epochs given the time duration of every epoch
:param raw_data: mne.io.RawArray instance
:param duration: seconds for copping
:return: mne Epochs class
"""
events = mne.make_fixed_length_events(raw_data, duration=duration)
epochs = mne.Epochs(raw_data, events, preload=True)
return epochs
def test_field_map_ctf():
"""Test that field mapping can be done with CTF data."""
raw = read_raw_fif(raw_ctf_fname).crop(0, 1)
raw.apply_gradient_compensation(3)
events = make_fixed_length_events(raw, duration=0.5)
evoked = Epochs(raw, events).average()
evoked.pick_channels(evoked.ch_names[:50]) # crappy mapping but faster
# smoke test
make_field_map(evoked, trans=trans_fname, subject='sample',
subjects_dir=subjects_dir)
def test_make_fixed_length_events():
"""Test making events of a fixed length."""
raw = read_raw_fif(raw_fname)
events = make_fixed_length_events(raw, id=1)
assert_true(events.shape[1], 3)
events_zero = make_fixed_length_events(raw, 1, first_samp=False)
assert_equal(events_zero[0, 0], 0)
assert_array_equal(events_zero[:, 0], events[:, 0] - raw.first_samp)
# With limits
tmin, tmax = raw.times[[0, -1]]
duration = tmax - tmin
events = make_fixed_length_events(raw, 1, tmin, tmax, duration)
assert_equal(events.shape[0], 1)
# With bad limits (no resulting events)
assert_raises(ValueError, make_fixed_length_events, raw, 1, tmin,
tmax - 1e-3, duration)
# not raw, bad id or duration
assert_raises(TypeError, make_fixed_length_events, raw, 2.3)
assert_raises(TypeError, make_fixed_length_events, 'not raw', 2)
assert_raises(TypeError, make_fixed_length_events, raw, 23, tmin, tmax,
'abc')
# Let's try some ugly sample rate/sample count combos
data = np.random.RandomState(0).randn(1, 27768)
# This breaks unless np.round() is used in make_fixed_length_events
info = create_info(1, 155.4499969482422)
raw = RawArray(data, info)
events = make_fixed_length_events(raw, 1, duration=raw.times[-1])
assert events[0, 0] == 0
assert len(events) == 1
# Without use_rounding=True this breaks
raw = RawArray(data[:, :21216], info)
events = make_fixed_length_events(raw, 1, duration=raw.times[-1])
assert events[0, 0] == 0
assert len(events) == 1
# Make sure it gets used properly by compute_raw_covariance
cov = compute_raw_covariance(raw, tstep=None)
expected = np.cov(data[:, :21216])
np.testing.assert_allclose(cov['data'], expected, atol=1e-12)
def create_cognitive_reduce_features(data_path):
preprocess = 'raw'
for f in data_path.rglob("*{:}.edf".format(preprocess)):
print(f.name)
task = re.findall('(?<=_S[0-9]{2}_T[0-9]{2}_).+(?=_raw\.edf)',
f.name)[0]
uid = re.findall('.+(?=_S[0-9]+_T[0-9]+_)', f.name)[0]
# Read eeg file
raw = mne.io.read_raw_edf(f)
# Rename Channel
mne.rename_channels(raw.info, renameChannels)
# Set montage (3d electrode location)
raw = raw.set_montage('standard_1020')
raw = raw.pick(EEG_channels)
raw.crop(tmin=(raw.times[-1] - 120))
# Create events every 20 seconds
reject_criteria = dict(eeg=160e-6, ) # 100 µV
events_array = mne.make_fixed_length_events(raw,
start=0.5,
stop=None,
duration=0.5)
epochs = mne.Epochs(raw,
events_array,
tmin=-0.5,
tmax=0.5,
reject=reject_criteria,
preload=True)
epochs.drop_bad()
print(epochs.get_data().shape)
# epochs.plot_drop_log(show=True, subject=uid)
frontal_epochs = epochs.copy().pick(frontal_ch)
parietal_epochs = epochs.copy().pick(parietal_ch)
frontal_bandpower = calculate_features(frontal_epochs)
frontal_bandpower['area'] = 'frontal'
parietal_bandpower = calculate_features(parietal_epochs)
parietal_bandpower['area'] = 'parietal'
final_feat = pd.concat((frontal_bandpower, parietal_bandpower))
final_feat['condition'] = task
final_feat['user'] = uid
final_feat.reset_index(drop=True)
final_feat.to_csv(f.parent / 'eeg_features.csv')
ratio = pd.DataFrame(frontal_bandpower['Theta'] /
parietal_bandpower['Alpha'],
columns=['ratio'])
ratio['condition'] = task
ratio['user'] = uid
ratio.to_csv(f.parent / 'thetaf-alphap.csv')
def test_make_fixed_length_events():
"""Test making events of a fixed length."""
raw = read_raw_fif(raw_fname, add_eeg_ref=False)
events = make_fixed_length_events(raw, id=1)
assert_true(events.shape[1], 3)
events_zero = make_fixed_length_events(raw, 1, first_samp=False)
assert_equal(events_zero[0, 0], 0)
assert_array_equal(events_zero[:, 0], events[:, 0] - raw.first_samp)
# With limits
tmin, tmax = raw.times[[0, -1]]
duration = tmax - tmin
events = make_fixed_length_events(raw, 1, tmin, tmax, duration)
assert_equal(events.shape[0], 1)
# With bad limits (no resulting events)
assert_raises(ValueError, make_fixed_length_events, raw, 1, tmin,
tmax - 1e-3, duration)
# not raw, bad id or duration
assert_raises(ValueError, make_fixed_length_events, raw, 2.3)
assert_raises(ValueError, make_fixed_length_events, 'not raw', 2)
assert_raises(ValueError, make_fixed_length_events, raw, 23, tmin, tmax,
'abc')
def transform_raw_data(subject='chb01', annotations_dict=annotations_dict):
import mne
from mne.channels.montage import get_builtin_montages
for rec in records_loc_lst:
#for all records matching the subject read them into an mne raw object and set the channels
if rec[0:5] == subject:
data_path = 'chb-mit-scalp-eeg-database-1.0.0/'
fname = data_path + rec
data = mne.io.read_raw_edf(fname, preload=True)
data = data.filter(1., 40., fir_design='firwin', n_jobs=1)
info = data.info
info['ch_names'] = ['AF7', 'FT7', 'TP7', 'PO7', 'AF3', 'FC3', 'CP3', 'PO3', 'AF4', 'FC4', 'CP4', 'PO4', 'AF8', 'FT8', 'TP8', 'PO8', 'FCz', 'CPz', 'T7', 'FT9', 'FT10', 'T8', 'TP8']
for i in range(len(info['chs'])):
info['chs'][i]['ch_name'] = info['ch_names'][i]
montage = mne.channels.read_montage("standard_1020")
data.set_montage(montage)
#if rec in annotations_dict set the annotations for the seizures in the raw object
rec_name = rec.split('/')[1].split('.')[0]
if rec_name in annotations_dict:
anno = annotations_dictionary[rec_name]
data.set_annotations(anno)
event_id = dict(Seizure=1, Nonseizure=0)
events_from_annot, event_dict = mne.events_from_annotations(data, chunk_duration=1)
#if rec not in annotations_dict set the annotations as all nonseizure in the raw object
if rec_name not in annotations_dictionary:
events = mne.make_fixed_length_events(data, id=0, start=0, stop=None, duration=1.0, first_samp=True, overlap=0.0)
mapping = {0: 'Nonseizure', 1: 'Seizure'}
onsets = events[:, 0] / data.info['sfreq']
durations = np.ones_like(onsets) # assumes instantaneous events
descriptions = [mapping[event_id] for event_id in events[:, 2]]
annot_from_events = mne.Annotations(onset=onsets, duration=durations,
description=descriptions)
data.set_annotations(annot_from_events)
#save raw files with annotations set as fif files
fif_lst = []
fif = '_raw.fif'
file_nm = rec_name + fif
fif_lst.append(file_nm)
data.save(file_nm, picks='all', fmt='single')
def test_dipole_fitting_ctf():
"""Test dipole fitting with CTF data."""
raw_ctf = read_raw_ctf(fname_ctf).set_eeg_reference()
events = make_fixed_length_events(raw_ctf, 1)
evoked = Epochs(raw_ctf, events, 1, 0, 0, baseline=None).average()
cov = make_ad_hoc_cov(evoked.info)
sphere = make_sphere_model((0., 0., 0.))
# XXX Eventually we should do some better checks about accuracy, but
# for now our CTF phantom fitting tutorials will have to do
# (otherwise we need to add that to the testing dataset, which is
# a bit too big)
fit_dipole(evoked, cov, sphere)
def test_field_map_ctf():
"""Test that field mapping can be done with CTF data."""
raw = read_raw_fif(raw_ctf_fname).crop(0, 1)
raw.apply_gradient_compensation(3)
events = make_fixed_length_events(raw, duration=0.5)
evoked = Epochs(raw, events).average()
evoked.pick_channels(evoked.ch_names[:50]) # crappy mapping but faster
# smoke test
make_field_map(evoked,
trans=trans_fname,
subject='sample',
subjects_dir=subjects_dir)
def get_emg_epoch(subject, raw_emg, time, config):
"""Create the epoch data from raw data.
Parameter
----------
subject : string
String of subject ID e.g. 7707
raw_emg : mne raw object
data structure of raw_emg
time : list
A list with start and end time
config : yaml
The configuration file
Returns
----------
mne epoch data
A data (dict) of all the subjects with different conditions
"""
# Parameters
epoch_length = config['epoch_length']
overlap = config['overlap']
if subject in config['subjects2']:
raw_cropped = raw_emg.copy().resample(config['sfreq2'],
npad='auto',
verbose='error')
else:
raw_cropped = raw_emg.copy().crop(tmin=time[0], tmax=time[1])
raw_cropped = raw_cropped.copy().resample(config['sfreq2'],
npad='auto',
verbose='error')
if config['high_pass_filter']:
raw_cropped = raw_cropped.filter(l_freq=config['filter_freq'][0],
h_freq=None,
picks=[
'emg_1', 'emg_2', 'emg_3',
'emg_4', 'emg_5', 'emg_6',
'emg_7', 'emg_8'
])
events = mne.make_fixed_length_events(raw_cropped,
duration=epoch_length,
overlap=epoch_length * overlap)
epochs = mne.Epochs(raw_cropped,
events,
tmin=0,
tmax=config['epoch_length'],
baseline=None,
verbose=False)
return epochs
def test_dipole_fitting_ctf():
"""Test dipole fitting with CTF data."""
raw_ctf = read_raw_ctf(fname_ctf).set_eeg_reference(projection=True)
events = make_fixed_length_events(raw_ctf, 1)
evoked = Epochs(raw_ctf, events, 1, 0, 0, baseline=None).average()
cov = make_ad_hoc_cov(evoked.info)
sphere = make_sphere_model((0., 0., 0.))
# XXX Eventually we should do some better checks about accuracy, but
# for now our CTF phantom fitting tutorials will have to do
# (otherwise we need to add that to the testing dataset, which is
# a bit too big)
fit_dipole(evoked, cov, sphere)
def test_ctf_plotting():
"""Test CTF topomap plotting."""
raw = read_raw_fif(ctf_fname, preload=True)
assert raw.compensation_grade == 3
events = make_fixed_length_events(raw, duration=0.01)
assert len(events) > 10
evoked = Epochs(raw, events, tmin=0, tmax=0.01, baseline=None).average()
assert get_current_comp(evoked.info) == 3
# smoke test that compensation does not matter
evoked.plot_topomap(time_unit='s')
# better test that topomaps can still be used without plotting ref
evoked.pick_types(meg=True, ref_meg=False)
evoked.plot_topomap()
def _get_global_reject_epochs(raw):
duration = 3.
events = mne.make_fixed_length_events(
raw, id=3000, start=0, duration=duration)
epochs = mne.Epochs(
raw, events, event_id=3000, tmin=0, tmax=duration, proj=False,
baseline=None, reject=None)
epochs.apply_proj()
epochs.load_data()
epochs.pick_types(meg=True)
reject = get_rejection_threshold(epochs, decim=8)
return reject
def test_ctf_plotting():
"""Test CTF topomap plotting."""
raw = read_raw_fif(ctf_fname, preload=True)
assert raw.compensation_grade == 3
events = make_fixed_length_events(raw, duration=0.01)
assert len(events) > 10
evoked = Epochs(raw, events, tmin=0, tmax=0.01, baseline=None).average()
assert get_current_comp(evoked.info) == 3
# smoke test that compensation does not matter
evoked.plot_topomap(time_unit='s')
# better test that topomaps can still be used without plotting ref
evoked.pick_types(meg=True, ref_meg=False)
evoked.plot_topomap()
def create_epoch(
X,
sampling_rate,
duration=4.0,
overlap=0.0,
ds_factor=1.0,
verbose=None,
baseline=None,
):
# Create Basic info data
# X.shape to be channel, n_sample
n_channels = X.shape[0]
raw = create_raw(X, n_channels, sampling_rate)
# events = mne.make_fixed_length_events(raw, 1, duration=duration)
# delta = 1. / raw.info['sfreq'] # TODO understand this delta
# epochs = mne.Epochs(raw, events, event_id=[1], tmin=tmin,
# tmax=tmax - delta,
# verbose=verbose, baseline=baseline)
events = mne.make_fixed_length_events(raw,
1,
duration=duration,
overlap=overlap)
delta = 1.0 / raw.info["sfreq"]
if float(ds_factor) != 1.0:
epochs = mne.Epochs(
raw,
events,
event_id=[1],
tmin=0.0,
tmax=duration - delta,
verbose=verbose,
baseline=baseline,
preload=True,
)
epochs = epochs.copy().resample(sampling_rate / ds_factor, npad="auto")
else:
epochs = mne.Epochs(
raw,
events,
event_id=[1],
tmin=0.0,
tmax=duration - delta,
verbose=verbose,
baseline=baseline,
preload=False,
)
return epochs
def test_compute_features_epochs():
raw = mne.io.read_raw_fif(raw_fname, verbose=False)
raw = raw.copy().crop(0, 200).pick([0, 1, 330, 331,
332] # take some MEG and EEG
)
raw.info.normalize_proj()
events = mne.make_fixed_length_events(raw,
id=3000,
start=0,
duration=10.,
stop=raw.times[-1] - 60.)
epochs = mne.Epochs(raw,
events,
event_id=3000,
tmin=0,
tmax=60.,
proj=True,
baseline=None,
reject=None,
preload=True,
decim=1)
computed_features, res = compute_features(epochs,
features=[
'psds', 'covs',
'cross_frequency_covs',
'cross_frequency_corrs',
'cospectral_covs'
],
frequency_bands=frequency_bands)
n_channels = len(raw.ch_names)
n_freqs = len(res['freqs'])
n_fb = len(frequency_bands)
assert set(computed_features.keys()) == {
'psds', 'covs', 'cross_frequency_covs', 'cross_frequency_corrs',
'cospectral_covs'
}
assert computed_features['psds'].shape == (n_channels, n_freqs)
assert computed_features['covs'].shape == (n_fb, n_channels, n_channels)
assert (computed_features['cross_frequency_covs'].shape == (n_fb *
n_channels,
n_fb *
n_channels))
assert (computed_features['cross_frequency_corrs'].shape == (n_fb *
n_channels,
n_fb *
n_channels))
assert (computed_features['cospectral_covs'].shape[1:] == (n_channels,
n_channels))
def create_epochs(raw: Raw, picks=None) -> Epochs:
'''
Create epochs from Raw instance with overlap between epochs.
Args:
Raw raw: Raw object containing EEGLAB .set data
list picks: Subset of channel names to include in Epochs data,
if None use all channels from Raw instance
:return: Epochs epochs: Epochs extracted from Raw instance
See Also
--------
mne.io.Raw, mne.Epochs : Documentation of attribute and methods.
'''
def _check_epochs_are_overlapping():
"""
Check that created epochs are overlapping and raises error if not.
For speed concerns only checks overlap for one channel.
"""
n_epochs = epochs.get_data().shape[0]
overlap_data_points = int(overlap_in_seconds * raw.info['sfreq'])
for epoch_num in range(n_epochs - 1):
try:
assert np.array_equal(
epochs.get_data()[epoch_num, 1, overlap_data_points:],
epochs.get_data()[epoch_num + 1, 1, :overlap_data_points])
except AssertionError:
logging.error('Epochs are not overlapping!')
raise
overlap_in_seconds = EPOCH_OVERLAP_RATIO * EPOCH_LENGTH_IN_SECONDS
events = make_fixed_length_events(raw,
id=1,
first_samp=True,
duration=EPOCH_LENGTH_IN_SECONDS,
overlap=overlap_in_seconds)
epochs = Epochs(raw=raw,
events=events,
picks=picks,
event_id=1,
baseline=None,
tmin=0.,
tmax=EPOCH_LENGTH_IN_SECONDS - 0.001,
preload=True)
_check_epochs_are_overlapping()
return epochs
def _compute_cov(file_raw, duration):
subject = pp.get_subject(file_raw)
raw = mne.io.read_raw_fif(file_raw)
raw.crop(tmax=duration * 60)
rawc, reject = pp.clean_raw(raw, subject)
events = mne.make_fixed_length_events(rawc,
id=3000,
start=0,
duration=pp.duration)
epochs = mne.Epochs(rawc,
events,
event_id=3000,
tmin=0,
tmax=pp.duration,
proj=True,
baseline=None,
reject=reject,
preload=False,
decim=1)
epochs.drop_bad()
clean_events = events[epochs.selection]
picks = mne.pick_types(rawc.info, meg=True)
covs = []
for fb in pp.fbands:
rf = rawc.copy().load_data().filter(fb[0], fb[1])
ec = mne.Epochs(rf,
clean_events,
event_id=3000,
tmin=0,
tmax=pp.duration,
proj=True,
baseline=None,
reject=None,
preload=False,
decim=1,
picks=picks)
cov = mne.compute_covariance(ec, method='oas', rank=None)
covs.append(cov.data)
out = dict(subject=subject,
kind='rest',
n_events=len(events),
n_events_good=len(clean_events),
covs=np.array(covs))
return out
def test_lcmv_ctf_comp():
"""Test interpolation with compensated CTF data."""
ctf_dir = op.join(testing.data_path(download=False), 'CTF')
raw_fname = op.join(ctf_dir, 'somMDYO-18av.ds')
raw = mne.io.read_raw_ctf(raw_fname, preload=True)
events = mne.make_fixed_length_events(raw, duration=0.2)[:2]
epochs = mne.Epochs(raw, events, tmin=0., tmax=0.2)
evoked = epochs.average()
with warnings.catch_warnings(record=True):
data_cov = mne.compute_covariance(epochs)
fwd = mne.make_forward_solution(evoked.info, None,
mne.setup_volume_source_space(pos=15.0),
mne.make_sphere_model())
filters = mne.beamformer.make_lcmv(evoked.info, fwd, data_cov)
assert 'weights' in filters
def read_xdf_eeg_data(config, subject):
read_path = config['raw_eeg_path'] + 'S_' + subject + '/eeg.xdf'
raw = read_raw_xdf(read_path)
raw = raw.drop_channels(
['ACC30', 'ACC31', 'ACC32', 'Packet Counter', 'TRIGGER'])
raw.set_montage(montage="standard_1020", set_dig=True, verbose=False)
ch_names = [
'Fp1', 'Fp2', 'AF3', 'AF4', 'F7', 'F8', 'F3', 'Fz', 'F4', 'FC5', 'FC6',
'T7', 'T8', 'C3', 'Cz', 'C4', 'CP5', 'CP6', 'P7', 'P8', 'P3', 'Pz',
'P4', 'PO7', 'PO8', 'PO3', 'PO4', 'O1', 'O2', 'A2'
]
epoch_length = config['epoch_length']
events = mne.make_fixed_length_events(raw, duration=epoch_length)
epochs = mne.Epochs(raw, events, picks=ch_names, verbose=False)
animate(epochs, config)
return raw
def mne_epoch(raw,
tmax=3.,
tmin=None,
events=None,
event_id='rest',
reject_by_annotation=True):
if events is None:
events = mne.make_fixed_length_events(raw, duration=tmax)
event_id = {'rest': 1}
tmin = 0
epochs = mne.Epochs(raw,
events=events,
event_id=event_id,
tmin=tmin,
tmax=tmax,
baseline=None,
reject_by_annotation=reject_by_annotation)
return epochs
def test_lcmv_ctf_comp():
"""Test interpolation with compensated CTF data."""
ctf_dir = op.join(testing.data_path(download=False), 'CTF')
raw_fname = op.join(ctf_dir, 'somMDYO-18av.ds')
raw = mne.io.read_raw_ctf(raw_fname, preload=True)
events = mne.make_fixed_length_events(raw, duration=0.2)[:2]
epochs = mne.Epochs(raw, events, tmin=0., tmax=0.2)
evoked = epochs.average()
with pytest.warns(RuntimeWarning,
match='Too few samples .* estimate may be unreliable'):
data_cov = mne.compute_covariance(epochs)
fwd = mne.make_forward_solution(evoked.info, None,
mne.setup_volume_source_space(pos=15.0),
mne.make_sphere_model())
filters = mne.beamformer.make_lcmv(evoked.info, fwd, data_cov)
assert 'weights' in filters
def test_plot_evoked_cov():
"""Test plot_evoked with noise_cov."""
evoked = _get_epochs().average()
cov = read_cov(cov_fname)
cov['projs'] = [] # avoid warnings
evoked.plot(noise_cov=cov, time_unit='s')
with pytest.raises(TypeError, match='Covariance'):
evoked.plot(noise_cov=1., time_unit='s')
with pytest.raises(IOError, match='No such file'):
evoked.plot(noise_cov='nonexistent-cov.fif', time_unit='s')
raw = read_raw_fif(raw_sss_fname)
events = make_fixed_length_events(raw)
epochs = Epochs(raw, events, picks=default_picks)
cov = compute_covariance(epochs)
evoked_sss = epochs.average()
with pytest.warns(RuntimeWarning, match='relative scaling'):
evoked_sss.plot(noise_cov=cov, time_unit='s')
plt.close('all')
def test_plot_evoked_cov():
"""Test plot_evoked with noise_cov."""
evoked = _get_epochs().average()
cov = read_cov(cov_fname)
cov['projs'] = [] # avoid warnings
evoked.plot(noise_cov=cov, time_unit='s')
with pytest.raises(TypeError, match='Covariance'):
evoked.plot(noise_cov=1., time_unit='s')
with pytest.raises(IOError, match='No such file'):
evoked.plot(noise_cov='nonexistent-cov.fif', time_unit='s')
raw = read_raw_fif(raw_sss_fname)
events = make_fixed_length_events(raw)
epochs = Epochs(raw, events, picks=picks)
cov = compute_covariance(epochs)
evoked_sss = epochs.average()
with pytest.warns(RuntimeWarning, match='relative scaling'):
evoked_sss.plot(noise_cov=cov, time_unit='s')
plt.close('all')
def _compute_cov(subject):
rawc, reject = preprocess_raw(subject)
events = mne.make_fixed_length_events(rawc,
id=3000,
start=0,
duration=pp.duration)
epochs = mne.Epochs(rawc,
events,
event_id=3000,
tmin=0,
tmax=pp.duration,
proj=True,
baseline=None,
reject=reject,
preload=False,
decim=1)
epochs.drop_bad()
clean_events = events[epochs.selection]
# picks = mne.pick_types(rawc.info, meg=False, eeg=True)
covs = []
for fb in pp.fbands:
rf = rawc.copy().load_data().filter(fb[0], fb[1])
ec = mne.Epochs(rf,
clean_events,
event_id=3000,
tmin=0,
tmax=pp.duration,
proj=True,
baseline=None,
reject=None,
preload=False,
decim=1,
picks=None)
cov = mne.compute_covariance(ec, method='oas', rank=None)
covs.append(cov.data)
out = dict(subject=subject,
n_events=len(events),
n_events_good=len(clean_events),
covs=np.array(covs),
age=age_of(subject))
return out
def spectral_epochs(label: str,
raw: mne.io.Raw,
epoch_size: int,
max_freq: int = 100,
n_fft: int = 48,
filter=True) -> np.array:
"""Read raw data and split into epochs of a given size (s), compute features
over each one
label: subject identifier
epoch_size: duration of epochs in seconds
data_folder: location of source data
max_freq: max frequency for FFT (default 100)
n_fft: FFT size (default 48)
Returns: labels, features
labels: a list of labels with the format <subject>-<run_index>-<N>
features: a list of np.arrays one per epoch containing the features
"""
features = []
labels = []
events = mne.make_fixed_length_events(raw, id=1, duration=epoch_size)
epochs = mne.Epochs(raw,
events,
tmin=0.,
tmax=epoch_size,
baseline=None,
detrend=1,
decim=8,
preload=True)
for N in range(len(epochs)):
features.append(
spectral_features(epochs[N],
max_freq=max_freq,
n_fft=n_fft,
filter=filter))
labels.append("{}-{}".format(label, N))
print('.', end='', flush=True)
print('|', end='', flush=True)
return labels, features
def test_plot_evoked_cov():
"""Test plot_evoked with noise_cov."""
import matplotlib.pyplot as plt
evoked = _get_epochs().average()
cov = read_cov(cov_fname)
cov['projs'] = [] # avoid warnings
evoked.plot(noise_cov=cov, time_unit='s')
with pytest.raises(TypeError, match='Covariance'):
evoked.plot(noise_cov=1., time_unit='s')
with pytest.raises(IOError, match='No such file'):
evoked.plot(noise_cov='nonexistent-cov.fif', time_unit='s')
raw = read_raw_fif(raw_sss_fname)
events = make_fixed_length_events(raw)
epochs = Epochs(raw, events)
cov = compute_covariance(epochs)
evoked_sss = epochs.average()
with warnings.catch_warnings(record=True) as w:
evoked_sss.plot(noise_cov=cov, time_unit='s')
plt.close('all')
assert any('relative scal' in str(ww.message) for ww in w)
def test_plot_evoked_cov():
"""Test plot_evoked with noise_cov."""
import matplotlib.pyplot as plt
evoked = _get_epochs().average()
cov = read_cov(cov_fname)
cov['projs'] = [] # avoid warnings
evoked.plot(noise_cov=cov, time_unit='s')
with pytest.raises(TypeError, match='Covariance'):
evoked.plot(noise_cov=1., time_unit='s')
with pytest.raises(IOError, match='No such file'):
evoked.plot(noise_cov='nonexistent-cov.fif', time_unit='s')
raw = read_raw_fif(raw_sss_fname)
events = make_fixed_length_events(raw)
epochs = Epochs(raw, events)
cov = compute_covariance(epochs)
evoked_sss = epochs.average()
with warnings.catch_warnings(record=True) as w:
evoked_sss.plot(noise_cov=cov, time_unit='s')
plt.close('all')
assert any('relative scal' in str(ww.message) for ww in w)
def _compute_rest_psd(subject, kind):
fname = op.join(
cfg.camcan_meg_raw_path,
subject, kind, '%s_raw.fif' % kind)
raw = mne.io.read_raw_fif(fname)
mne.channels.fix_mag_coil_types(raw.info)
raw = _run_maxfilter(raw, subject, kind)
_compute_add_ssp_exg(raw)
reject = _get_global_reject_epochs(raw)
stop = raw.times[-1]
duration = 30.
overlap = 8.
stop = raw.times[-1]
events = mne.make_fixed_length_events(
raw, id=3000, start=0, duration=overlap,
stop=stop - duration)
epochs = mne.Epochs(
raw, events, event_id=3000, tmin=0, tmax=duration, proj=True,
baseline=None, reject=reject, preload=True, decim=1)
# make sure not to decim it induces power line artefacts!
picks = mne.pick_types(raw.info, meg=True)
psd, freqs = mne.time_frequency.psd_welch(
epochs, fmin=0, fmax=150, n_fft=4096, # ~12 seconds
n_overlap=512,
picks=picks)
out_path = op.join(
cfg.derivative_path, subject)
out_fname = op.join(out_path, 'rest_sensors_psd_welch-epo.h5')
mne.externals.h5io.write_hdf5(
out_fname, {'psd': psd, 'freqs': freqs},
overwrite=True)
return {'n_events': len(events), 'n_events_good': psd.shape[0]}
def create_cognitive_full_features(data_path):
preprocess = 'raw'
for f in data_path.rglob("*{:}.edf".format(preprocess)):
print(f.name)
task = re.findall('(?<=_S[0-9]{2}_T[0-9]{2}_).+(?=_raw\.edf)',
f.name)[0]
uid = re.findall('.+(?=_S[0-9]+_T[0-9]+_)', f.name)[0]
# Read eeg file
raw = mne.io.read_raw_edf(f)
# Rename Channel
mne.rename_channels(raw.info, renameChannels)
# Set montage (3d electrode location)
raw = raw.set_montage('standard_1020')
raw = raw.pick(EEG_channels)
# raw.crop(tmin=(raw.times[-1] - 120))
# Create events every 20 seconds
reject_criteria = dict(eeg=140e-6, ) # 100 µV
events_array = mne.make_fixed_length_events(raw,
start=0.5,
stop=None,
duration=0.5)
epochs = mne.Epochs(raw,
events_array,
tmin=-0.5,
tmax=0.5,
reject=reject_criteria,
preload=True)
epochs.drop_bad()
print(epochs.get_data().shape)
# epochs.plot_drop_log(show=True, subject=uid)
epochs = epochs.copy().pick(EEG_channels)
bandpower_df = calculate_features(epochs)
bandpower_df.loc[:, ('info', 'condition')] = task
bandpower_df.loc[:, ('info', 'user')] = uid
bandpower_df.to_csv(f.parent / 'eeg_features_full_set.csv')
bandpower_df.to_pickle(f.parent / 'eeg_features_full_set.pd')
def get_epochs(self,resample=None):
from mne.time_frequency import psd_multitaper
raw = self.raw
validation_windowsize = self.validation_windowsize
front = self.front
back = self.back
# l_freq = self.l_freq
# h_freq = self.h_freq
events = mne.make_fixed_length_events(raw,id=1,start=front,
stop=raw.times[-1]-back,
duration=validation_windowsize)
epochs = mne.Epochs(raw,events,event_id=1,tmin=0,tmax=validation_windowsize,
preload=True)
if resample is not None:
epochs.resample(resample)
# psds,freq = psd_multitaper(epochs,fmin=l_freq,
# fmax=h_freq,
# tmin=0,tmax=validation_windowsize,
# low_bias=True,)
# psds = 10 * np.log10(psds)
self.epochs = epochs
def get_Onest_Amplitude_Duration_of_spindles(raw,channelList,
annotations=None,
moving_window_size=200,
lower_threshold=.9,
syn_channels=3,
l_bound=0.5,h_bound=2,
tol=1,higher_threshold=3.5,
front=300,back=100,
sleep_stage=True,
proba=True,
validation_windowsize=3,
l_freq=11,h_freq=16):
"""
raw: data after preprocessing
channelList: channel list of interest, and in this study we use 'F3','F4','C3','C4','O1','O2'
annotations: pandas DataFrame object containing manual annotations, such as sleep stages, spindle locations.
moving_window_size: size of the moving window for convolved root mean square computation. It should work better when it is the sampling frequency, which, in this case is 500 (we downsample subjects with 1000 Hz sampling rate).
lower_threshold: highpass threshold for spindle detection: decision making = trimmed_mean + lower_T * trimmed_std
higher_threshold: lowpass threshold for spindle detection: decision making = trimmed_mean + higher_T * trimmed_std
syn_channels: criteria for selecting spindles: at least # of channels have spindle instance and also in the mean channel
l_bound: low boundary for duration of a spindle instance
h_bound: high boundary for duration of a spindle instance
tol : tolerance for determing spindles (criteria in time)
front : First few seconds of recordings that we are not interested because there might be artifacts, or it is confirmed subjects could not fall asleep within such a short period
back : last few seconds of recordings that we are not interested due to the recording procedures
"""
# process the data without any other information
time=np.linspace(0,raw.last_samp/raw.info['sfreq'],raw._data[0,:].shape[0])
RMS = np.zeros((len(channelList),raw._data[0,:].shape[0]))
peak_time={} #preallocate
sfreq=raw.info['sfreq']
mph,mpl = {},{}
for ii, names in enumerate(channelList):
peak_time[names]=[]
segment,_ = raw[ii,:]
RMS[ii,:] = window_rms(segment[0,:],moving_window_size)
mph[names] = trim_mean(RMS[ii,int(front*sfreq):-int(back*sfreq)],0.05) + lower_threshold * trimmed_std(RMS[ii,:],0.05)
mpl[names] = trim_mean(RMS[ii,int(front*sfreq):-int(back*sfreq)],0.05) + higher_threshold * trimmed_std(RMS[ii,:],0.05)
pass_ = RMS[ii,:] > mph[names]#should be greater than then mean not the threshold to compute duration
up = np.where(np.diff(pass_.astype(int))>0)
down = np.where(np.diff(pass_.astype(int))<0)
up = up[0]
down = down[0]
#######key to idenfity segments that goes beyond the lower threshold########
#print(down[0],up[0])
if down[0] < up[0]:
down = down[1:]
#print(down[0],up[0])
#############################
if (up.shape > down.shape) or (up.shape < down.shape):
size = np.min([up.shape,down.shape])
up = up[:size]
down = down[:size]
C = np.vstack((up,down))
for pairs in C.T:
if l_bound < (time[pairs[1]] - time[pairs[0]]) < h_bound:
SegmentForPeakSearching = RMS[ii,pairs[0]:pairs[1]]
if np.max(SegmentForPeakSearching) < mpl[names]:
temp_temp_time = time[pairs[0]:pairs[1]]
ints_temp = np.argmax(SegmentForPeakSearching)
peak_time[names].append(temp_temp_time[ints_temp])
peak_time['mean']=[];peak_at=[];duration=[]
RMS_mean=hmean(RMS)
# apply the same algorithm to the mean of the RMSs
mph['mean'] = trim_mean(RMS_mean[int(front*sfreq):-int(back*sfreq)],0.05) + lower_threshold * trimmed_std(RMS_mean,0.05)
mpl['mean'] = trim_mean(RMS_mean[int(front*sfreq):-int(back*sfreq)],0.05) + higher_threshold * trimmed_std(RMS_mean,0.05)
pass_ =RMS_mean > mph['mean']
up = np.where(np.diff(pass_.astype(int))>0)
down= np.where(np.diff(pass_.astype(int))<0)
up = up[0]
down = down[0]
###############################
#print(down[0],up[0])
if down[0] < up[0]:
down = down[1:]
#print(down[0],up[0])
#############################
if (up.shape > down.shape) or (up.shape < down.shape):
size = np.min([up.shape,down.shape])
up = up[:size]
down = down[:size]
C = np.vstack((up,down))
for pairs in C.T:
if l_bound < (time[pairs[1]] - time[pairs[0]]) < h_bound:
SegmentForPeakSearching = RMS_mean[pairs[0]:pairs[1],]
if np.max(SegmentForPeakSearching)< mpl['mean']:
temp_time = time[pairs[0]:pairs[1]]
ints_temp = np.argmax(SegmentForPeakSearching)
peak_time['mean'].append(temp_time[ints_temp])
peak_at.append(SegmentForPeakSearching[ints_temp])
duration_temp = time[pairs[1]] - time[pairs[0]]
duration.append(duration_temp)
time_find=[];mean_peak_power=[];Duration=[];
for item,PEAK,duration_time in zip(peak_time['mean'],peak_at,duration):
temp_timePoint=[]
for ii, names in enumerate(channelList):
try:
temp_timePoint.append(min(enumerate(peak_time[names]), key=lambda x: abs(x[1]-item))[1])
except:
temp_timePoint.append(item + 2)
try:
if np.sum((abs(np.array(temp_timePoint) - item)<tol).astype(int))>=syn_channels:
time_find.append(float(item))
mean_peak_power.append(PEAK)
Duration.append(duration_time)
except:
pass
############ the end of the processing in which no other inputs ##
#### update the spindles we found if we want to add information of sleep stages ######
if sleep_stage:
temp_time_find=[];temp_mean_peak_power=[];temp_duration=[];
# seperate out stage 2
stages = annotations[annotations.Annotation.apply(stage_check)]
On = stages[::2];Off = stages[1::2]
stage_on_off = list(zip(On.Onset.values, Off.Onset.values))
if abs(np.diff(stage_on_off[0]) - 30) < 2:
pass
else:
On = stages[1::2];Off = stages[::2]
stage_on_off = list(zip(On.Onset.values[1:], Off.Onset.values[2:]))
for single_time_find, single_mean_peak_power, single_duration in zip(time_find,mean_peak_power,Duration):
for on_time,off_time in stage_on_off:
if intervalCheck([on_time,off_time],single_time_find,tol=tol):
temp_time_find.append(single_time_find)
temp_mean_peak_power.append(single_mean_peak_power)
temp_duration.append(single_duration)
time_find=temp_time_find;mean_peak_power=temp_mean_peak_power;Duration=temp_duration
####### decision function based on spindles we have just found ####
"""
A single floating representation is computed based on the validation window size (say 3 seconds), and information like peak power densities and peak frequencies are added to the feature space.
We fit the standandardized features with the labels (spindles found by the automated pipeline)
A prediction probability is computed using scikit-learn::logisticregression
"""
decision_features=None;auto_proba=None;auto_label=None
if proba:
result = pd.DataFrame({'Onset':time_find,'Duration':Duration,'Annotation':['spindle']*len(Duration)})
auto_label,_ = discritized_onset_label_auto(raw,result,validation_windowsize)
events = mne.make_fixed_length_events(raw,id=1,start=front,stop=raw.times[-1]-back,duration=validation_windowsize)
epochs = mne.Epochs(raw,events,event_id=1,tmin=0,tmax=validation_windowsize,preload=True)
data = epochs.get_data()[:,:,:-1]
full_prop=[]
for d in data:
temp_p=[]
#fig,ax = plt.subplots(nrows=2,ncols=3,figsize=(8,8))
for ii,(name) in enumerate(zip(channelList)):#,ax.flatten())):
rms = window_rms(d[ii,:],500)
l = trim_mean(rms,0.05) + lower_threshold * trimmed_std(rms,0.05)
h = trim_mean(rms,0.05) + higher_threshold * trimmed_std(rms,0.05)
prop = (sum(rms>l)+sum(rms<h))/(sum(rms<h) - sum(rms<l))
if np.isinf(prop):
prop = (sum(rms>l)+sum(rms<h))
temp_p.append(prop)
full_prop.append(temp_p)
psds,freq = mne.time_frequency.psd_multitaper(epochs,fmin=l_freq,fmax=h_freq,tmin=0,tmax=3,low_bias=True,)
psds = 10* np.log10(psds)
features = pd.DataFrame(np.concatenate((np.array(full_prop),psds.max(2),freq[np.argmax(psds,2)]),1))
decision_features = StandardScaler().fit_transform(features.values,auto_label)
clf = LogisticRegressionCV(Cs=np.logspace(-4,6,11),cv=5,tol=1e-7,max_iter=int(1e7))
clf.fit(decision_features,auto_label)
auto_proba=clf.predict_proba(decision_features)[:,-1]
return time_find,mean_peak_power,Duration,mph,mpl,auto_proba,auto_label
raw = mne.io.read_raw_ctf(raw_fname, verbose='error')
raw.crop(0, crop_to).load_data().pick_types(meg=True, eeg=False).resample(80)
raw.apply_gradient_compensation(3)
projs_ecg, _ = compute_proj_ecg(raw, n_grad=1, n_mag=2)
projs_eog, _ = compute_proj_eog(raw, n_grad=1, n_mag=2, ch_name='MLT31-4407')
raw.info['projs'] += projs_ecg
raw.info['projs'] += projs_eog
raw.apply_proj()
cov = mne.compute_raw_covariance(raw) # compute before band-pass of interest
##############################################################################
# Now we band-pass filter our data and create epochs.
raw.filter(14, 30)
events = mne.make_fixed_length_events(raw, duration=5.)
epochs = mne.Epochs(raw, events=events, tmin=0, tmax=5.,
baseline=None, reject=dict(mag=8e-13), preload=True)
del raw
##############################################################################
# Compute the forward and inverse
# -------------------------------
# This source space is really far too coarse, but we do this for speed
# considerations here
pos = 15. # 1.5 cm is very broad, done here for speed!
src = mne.setup_volume_source_space('bst_resting', pos, bem=bem,
subjects_dir=subjects_dir, verbose=True)
fwd = mne.make_forward_solution(epochs.info, trans, src, bem)
data_cov = mne.compute_covariance(epochs)
magFlat = 1e-14 gradFlat = 1000e-15 picks = [] event_id, tmin, tmax = 1, 0.0, 1.0 ##for CRM and DFNAM using 1 sec epochs for others use 2 second data_path = '/home/custine/MEG/data/epi_conn/' + subjID + '/' raw_fname = data_path + runName + '_raw.fif' event_fname = data_path + 'eve/' + runName + '.eve' epoch_fname = data_path + 'eve/' + runName + '-epo.fif' evoked_fname = data_path + 'ave_projon/' + runName + '-ave.fif' ######### # #Read Raw file raw = mne.io.Raw(raw_fname) print raw.info print(raw.info['ch_names']) picks = mne.pick_types(raw.info, meg= True, eeg = False, eog = True, stim = True, exclude = []) print picks # #Epoch data into 5s intervals events = mne.make_fixed_length_events(raw, 1, start=0, stop=None, duration=2.) mne.write_events(event_fname, events) print "Done " + subjID epochs = mne.Epochs(raw, events, event_id, tmin, tmax, baseline = (None,0), picks = picks, proj = True, name = '2sec', preload = True, flat = dict(mag = magFlat, grad= gradFlat), reject= None) #dict(mag=magRej, grad=gradRej, eeg = eegRej)) print epochs epochs.save(epoch_fname) evoked = epochs.average(picks = None) evoked.save(evoked_fname) print evoked
auc_threshold='adapt')
r32 = eegPinelineDesign.detection_pipeline_crossvalidation(raw_32,raw_32.ch_names,
annotation,1000,
0.4,3.4,16,
11,16,f,cv=cv,
auc_threshold='adapt')
r61 = eegPinelineDesign.detection_pipeline_crossvalidation(raw_61,raw_61.ch_names,
annotation,1000,
0.4,3.4,int(61/2),
11,16,f,cv=cv,
auc_threshold='adapt')
print(np.mean(r6[3],0),np.mean(r32[3],0),np.mean(r61[3],0))
front=300;back=100
stop = raw_6.times[-1]-back
events = mne.make_fixed_length_events(raw_6,1,start=front,stop=stop,duration=3,)
epochs = mne.Epochs(raw_6,events,1,tmin=0,tmax=3,proj=False,preload=True)
epochs.resample(64)
gold_standard = eegPinelineDesign.read_annotation(raw_6,f)
manual_labels,_ = eegPinelineDesign.discritized_onset_label_manual(raw_6,gold_standard,3)
freqs = np.arange(11,17,1)
n_cycles = freqs / 2.
time_bandwidth = 2.0 # Least possible frequency-smoothing (1 taper)
power = tfr_multitaper(epochs,freqs,n_cycles=n_cycles,time_bandwidth=time_bandwidth,return_itc=False,average=False,)
clf = Pipeline([('vectorizer',Vectorizer()),
('scaler',StandardScaler()),
('est',exported_pipeline)])
data = power.data
labels = manual_labels
def intra(subj):
'''
Performs initial computations within subject and returns average PSD and variance of all epochs.
'''
print('Now beginning intra processing on ' + subj + '...\n') * 5
# Set function parameters
fname_label = subjects_dir + '/' + subj + '/' + 'label/%s.label' % label_name
fname_raw = data_path + subj + '/' + subj + '_rest_raw_sss.fif'
if os.path.isfile(data_path + subj + '/' + subj + '_rest_raw_sss-ico-4-fwd.fif'):
fname_fwd = data_path + subj + '/' + subj + '_rest_raw_sss-ico-4-fwd.fif'
else:
print('Subject ' + subj + ' does not have a ico-4-fwd.fif on file.')
if label_name.startswith('lh.'):
hemi = 'left'
elif label_name.startswith('rh.'):
hemi = 'right'
# Load data
label = mne.read_label(fname_label)
raw = fiff.Raw(fname_raw)
forward_meg = mne.read_forward_solution(fname_fwd)
# Estimate noise covariance from teh raw data
cov = mne.compute_raw_data_covariance(raw, reject=dict(eog=150e-6))
write_cov(data_path + subj + '/' + subj + '-cov.fif', cov)
# Make inverse operator
info = raw.info
inverse_operator = make_inverse_operator(info, forward_meg, cov, loose=None, depth=0.8)
# Epoch data into 4s intervals
events = mne.make_fixed_length_events(raw, 1, start=0, stop=None,
duration=4.)
# Set up pick list: (MEG minus bad channels)
include = []
exclude = raw.info['bads']
picks = fiff.pick_types(raw.info, meg=True, eeg=False, stim=False, eog=True, include=include, exclude=exclude)
# Read epochs and remove bad epochs
epochs = mne.Epochs(raw, events, event_id, tmin, tmax, proj=True, picks=picks, baseline=(None, 0), preload=True, reject=dict(grad=4000e-13, mag=4e-12, eog=150e-6))
# Pull data for averaging later
epc_array = epochs.get_data()
# Compute the inverse solution
inv = apply_inverse_epochs(epochs, inverse_operator, lambda2, method, label=label)
#Need to add a line here to automatically create stc directory within subj
epoch_num = 1
epoch_num_str = str(epoch_num)
for i in inv:
# i.save(data_path + subj + '/tmp/' + label_name[3:] + '_rest_raw_sss-oct-6-inv' + epoch_num_str)
i.save(data_path + subj + '/tmp/' + label_name[3:] + '_rest_raw_sss-ico-4-inv' + epoch_num_str)
epoch_num = epoch_num + 1
epoch_num_str = str(epoch_num)
# The following is used to remove the empty opposing hemisphere files
# and then move the files to save into the appropriate directory
if hemi == 'left':
filelist = [ f for f in os.listdir(data_path + subj + '/tmp') if f.endswith("-rh.stc") ]
for f in filelist:
os.remove(data_path + subj + '/tmp/' + f)
keepers = [ f for f in os.listdir(data_path + subj + '/tmp') if f.endswith("-lh.stc") ]
for f in keepers:
src = f
os.rename(data_path + subj + '/tmp/' + src, data_path + subj + '/inv/' + src)
elif hemi == 'right':
filelist = [ f for f in os.listdir(data_path + subj + '/tmp') if f.endswith("-lh.stc") ]
for f in filelist:
os.remove(data_path + subj + '/tmp/' + f)
keepers = [ f for f in os.listdir(data_path + subj + '/tmp') if f.endswith("-rh.stc") ]
for f in keepers:
src = f
os.rename(data_path + subj + '/tmp/' + src, data_path + subj + '/inv/' + src)
# define frequencies of interest
bandwidth = 4. # bandwidth of the windows in Hz
# compute source space psd in label
# Note: By using "return_generator=True" stcs will be a generator object
# instead of a list. This allows us so to iterate without having to
# keep everything in memory.
psd = compute_source_psd_epochs(epochs, inverse_operator, lambda2=lambda2,
method=method, fmin=fmin, fmax=fmax,
bandwidth=bandwidth, label=label, return_generator=False)
epoch_num = 1
epoch_num_str = str(epoch_num)
for i in psd:
i.save(data_path + subj + '/' + 'tmp' + '/' + label_name[3:] + '_dspm_snr-1_PSD'+ epoch_num_str)
epoch_num = epoch_num + 1
epoch_num_str = str(epoch_num)
if hemi == 'left':
filelist = [ f for f in os.listdir(data_path + subj + '/tmp') if f.endswith("-rh.stc") ]
for f in filelist:
os.remove(data_path + subj + '/tmp/' + f)
keepers = [ f for f in os.listdir(data_path + subj + '/tmp') if f.endswith("-lh.stc") ]
for f in keepers:
src = f
os.rename(data_path + subj + '/tmp/' + src,data_path + subj + '/psd/' + src)
elif hemi == 'right':
filelist = [ f for f in os.listdir(data_path + subj + '/tmp') if f.endswith("-lh.stc") ]
for f in filelist:
os.remove(data_path + subj + '/tmp/' + f)
keepers = [ f for f in os.listdir(data_path + subj + '/tmp') if f.endswith("-rh.stc") ]
for f in keepers:
src = f
os.rename(data_path + subj + '/tmp/' + src,data_path + subj + '/psd/' + src)
# This code computes the average PSDs of each epoch. Each PSD file is an array of shape N_vertices*N_frequencies. This code averages the PSD value of each vertex together and outputs the average PSD value of each frequency. Then, it averages the PSD values of each epoch, outputting one average PSD value per frequency value, i.e., this is the average across epochs.
n_epochs = len(epc_array)
for i, stc in enumerate(psd):
if i >= n_epochs:
break
if i == 0:
psd_avg = np.mean(stc.data, axis=0)
else:
psd_avg += np.mean(stc.data, axis=0)
print('Length of psd for subject ' + subj + ' is ' + str(len(psd)) + '.')
print('Number of epochs for subject ' + subj + ' is ' + str(n_epochs) + '.')
if len(psd) != 0:
psd_avg /= n_epochs
# Compute variance for each epoch and then variance across epochs
n_epochs = len(epc_array)
for i, stc in enumerate(psd):
if i >= n_epochs:
psd_var = np.array()
break
if i == 0:
psd_var = np.var(stc.data, axis=0)
else:
psd_var = np.vstack((psd_var,np.var(stc.data, axis=0)))
if len(psd) >= 2:
tot_var = np.var(psd_var, axis=0)
if len(psd) <= 1:
failed_subj = subj
print(failed_subj + ' failed. No PSD values calculated, likely because all epochs were rejected.')
return failed_subj, failed_subj, failed_subj
if len(psd) >= 2:
return (psd_avg, tot_var, len(psd_avg))
def test_make_fixed_length_events():
"""Test making events of a fixed length
"""
raw = fiff.Raw(raw_fname)
events = make_fixed_length_events(raw, id=1)
assert_true(events.shape[1], 3)
def thresholding_filterbased_spindle_searching(raw,channelList,annotations,moving_window_size=200,lower_threshold=.9,
syn_channels=3,l_bound=0.5,h_bound=2,tol=1,higher_threshold=3.5,
front=300,back=100,sleep_stage=True,proba=False,validation_windowsize=3):
time=np.linspace(0,raw.last_samp/raw.info['sfreq'],raw._data[0,:].shape[0])
RMS = np.zeros((len(channelList),raw._data[0,:].shape[0]))
peak_time={} #preallocate
sfreq=raw.info['sfreq']
mph,mpl = {},{}
for ii, names in enumerate(channelList):
peak_time[names]=[]
segment,_ = raw[ii,:]
RMS[ii,:] = window_rms(segment[0,:],moving_window_size)
mph[names] = trim_mean(RMS[ii,int(front*sfreq):-int(back*sfreq)],0.05) + lower_threshold * trimmed_std(RMS[ii,:],0.05)
mpl[names] = trim_mean(RMS[ii,int(front*sfreq):-int(back*sfreq)],0.05) + higher_threshold * trimmed_std(RMS[ii,:],0.05)
pass_ = RMS[ii,:] > mph[names]#should be greater than then mean not the threshold to compute duration
up = np.where(np.diff(pass_.astype(int))>0)
down = np.where(np.diff(pass_.astype(int))<0)
up = up[0]
down = down[0]
###############################
#print(down[0],up[0])
if down[0] < up[0]:
down = down[1:]
#print(down[0],up[0])
#############################
if (up.shape > down.shape) or (up.shape < down.shape):
size = np.min([up.shape,down.shape])
up = up[:size]
down = down[:size]
C = np.vstack((up,down))
for pairs in C.T:
if l_bound < (time[pairs[1]] - time[pairs[0]]) < h_bound:
SegmentForPeakSearching = RMS[ii,pairs[0]:pairs[1]]
if np.max(SegmentForPeakSearching) < mpl[names]:
temp_temp_time = time[pairs[0]:pairs[1]]
ints_temp = np.argmax(SegmentForPeakSearching)
peak_time[names].append(temp_temp_time[ints_temp])
peak_time['mean']=[];peak_at=[];duration=[]
RMS_mean=hmean(RMS)
mph['mean'] = trim_mean(RMS_mean[int(front*sfreq):-int(back*sfreq)],0.05) + lower_threshold * trimmed_std(RMS_mean,0.05)
mpl['mean'] = trim_mean(RMS_mean[int(front*sfreq):-int(back*sfreq)],0.05) + higher_threshold * trimmed_std(RMS_mean,0.05)
pass_ =RMS_mean > mph['mean']
up = np.where(np.diff(pass_.astype(int))>0)
down= np.where(np.diff(pass_.astype(int))<0)
up = up[0]
down = down[0]
###############################
#print(down[0],up[0])
if down[0] < up[0]:
down = down[1:]
#print(down[0],up[0])
#############################
if (up.shape > down.shape) or (up.shape < down.shape):
size = np.min([up.shape,down.shape])
up = up[:size]
down = down[:size]
C = np.vstack((up,down))
for pairs in C.T:
if l_bound < (time[pairs[1]] - time[pairs[0]]) < h_bound:
SegmentForPeakSearching = RMS_mean[pairs[0]:pairs[1],]
if np.max(SegmentForPeakSearching)< mpl['mean']:
temp_time = time[pairs[0]:pairs[1]]
ints_temp = np.argmax(SegmentForPeakSearching)
peak_time['mean'].append(temp_time[ints_temp])
peak_at.append(SegmentForPeakSearching[ints_temp])
duration_temp = time[pairs[1]] - time[pairs[0]]
duration.append(duration_temp)
time_find=[];mean_peak_power=[];Duration=[];
for item,PEAK,duration_time in zip(peak_time['mean'],peak_at,duration):
temp_timePoint=[]
for ii, names in enumerate(channelList):
try:
temp_timePoint.append(min(enumerate(peak_time[names]), key=lambda x: abs(x[1]-item))[1])
except:
temp_timePoint.append(item + 2)
try:
if np.sum((abs(np.array(temp_timePoint) - item)<tol).astype(int))>=syn_channels:
time_find.append(float(item))
mean_peak_power.append(PEAK)
Duration.append(duration_time)
except:
pass
if sleep_stage:
temp_time_find=[];temp_mean_peak_power=[];temp_duration=[];
# seperate out stage 2
stages = annotations[annotations.Annotation.apply(stage_check)]
On = stages[::2];Off = stages[1::2]
stage_on_off = list(zip(On.Onset.values, Off.Onset.values))
if abs(np.diff(stage_on_off[0]) - 30) < 2:
pass
else:
On = stages[1::2];Off = stages[::2]
stage_on_off = list(zip(On.Onset.values[1:], Off.Onset.values[2:]))
for single_time_find, single_mean_peak_power, single_duration in zip(time_find,mean_peak_power,Duration):
for on_time,off_time in stage_on_off:
if intervalCheck([on_time,off_time],single_time_find,tol=tol):
temp_time_find.append(single_time_find)
temp_mean_peak_power.append(single_mean_peak_power)
temp_duration.append(single_duration)
time_find=temp_time_find;mean_peak_power=temp_mean_peak_power;Duration=temp_duration
result = pd.DataFrame({'Onset':time_find,'Duration':Duration,'Annotation':['spindle']*len(Duration)})
auto_label,_ = discritized_onset_label_auto(raw,result,validation_windowsize)
decision_features=None
if proba:
events = mne.make_fixed_length_events(raw,id=1,start=0,duration=validation_windowsize)
epochs = mne.Epochs(raw,events,event_id=1,tmin=0,tmax=validation_windowsize,preload=True)
data = epochs.get_data()[:,:,:-1]
full_prop=[]
for d in data:
temp_p=[]
#fig,ax = plt.subplots(nrows=2,ncols=3,figsize=(8,8))
for ii,(name) in enumerate(zip(channelList)):#,ax.flatten())):
rms = window_rms(d[ii,:],500)
l = trim_mean(rms,0.05) + lower_threshold * trimmed_std(rms,0.05)
h = trim_mean(rms,0.05) + higher_threshold * trimmed_std(rms,0.05)
prop = (sum(rms>l)+sum(rms<h))/(sum(rms<h) - sum(rms<l))
temp_p.append(prop)
full_prop.append(temp_p)
psds,freq = mne.time_frequency.psd_multitaper(epochs,fmin=11,fmax=16,tmin=0,tmax=3,low_bias=True,)
psds = 10* np.log10(psds)
features = pd.DataFrame(np.concatenate((np.array(full_prop),psds.max(2),freq[np.argmax(psds,2)]),1))
decision_features = StandardScaler().fit_transform(features.values,auto_label)
clf = LogisticRegressionCV(Cs=np.logspace(-4,6,11),cv=5,tol=1e-7,max_iter=int(1e7))
clf.fit(decision_features,auto_label)
auto_proba=clf.predict_proba(decision_features)[:,-1]
return time_find,mean_peak_power,Duration,mph,mpl,auto_proba,auto_label
def compute_plv_pli_cc(raw,duration,plv_threshold_set,pli_threshold_set,cc_threshold_set,labels,fmin=11,fmax=16):
# make events
event_array = mne.make_fixed_length_events(raw,id=1,duration=float(duration))
event_array[:,-1] = np.arange(1,len(event_array)+1)
event_array[:,1] = duration * raw.info['sfreq']
# make epochs
tmin, tmax = -duration*0.2, duration #20% overlapping previous epoch
epochs = mne.Epochs(raw,event_array,tmin=tmin,tmax=tmax,
baseline=None,preload=True,proj=False)
sfreq = raw.info['sfreq']
features = ['mean','variance','delta_mean',
'delta variance','change variance',
'activity','mobility','complexity',
'spectral_entropy']#,'time_stamp']
# initialize folder
if not os.path.exists('epoch_COH_%.2f'%duration):
os.makedirs('epoch_COH_%.2f'%duration)
if not os.path.exists('epoch_PLI_%.2f'%duration):
os.makedirs('epoch_PLI_%.2f'%duration)
if not os.path.exists('epoch_PLV_%.2f'%duration):
os.makedirs('epoch_PLV_%.2f'%duration)
epochFeatures = {name:[] for name in features}
time_list=[]
con_methods=['coh','plv','pli']
# the entire pipeline
for ii,epoch_data in enumerate(epochs):
# easiest way to compute coh
temp_connection,freqs,times,n_epochs,n_tapers=mne.connectivity.spectral_connectivity(
epochs[str(ii+2)],
method='coh',
mode='multitaper',
sfreq=sfreq,
fmin=fmin,
fmax=fmax,
faverage=True,
)
temp_connection = [temp_connection[:,:,0]]
time_list.append(epochs[str(ii+2)].events[0][0])
print('computing features for epoch %d'%(ii+1))
#epochFeatures['time_stamp'].append
epochFeatures['mean'].append(np.mean(epoch_data))
epochFeatures['variance'].append(np.var(epoch_data))
epochFeatures['delta_mean'].append(np.mean(-np.diff(epoch_data,axis=1)))
epochFeatures['delta variance'].append(np.var(np.mean(-np.diff(epoch_data,axis=1))))
if ii == 0:
epochFeatures['change variance'].append(0)
elif ii == 1:
epochFeatures['change variance'].append(np.mean(np.var(epoch_data - epochFeatures['mean'][ii-1])))
else:
epochFeatures['change variance'].append(np.mean(np.var(epoch_data - epochFeatures['mean'][ii-1] - epochFeatures['mean'][ii-1])))
activity = np.var(epoch_data)
epochFeatures['activity'].append(activity)
tempData = -np.diff(epoch_data,axis=1)
mobility = np.std(tempData)/np.sqrt(activity)
epochFeatures['mobility'].append(mobility)
startRange = epoch_data[:,:-2]
endRange = epoch_data[:,2:]
tempData = endRange - startRange
complexity = (np.std(tempData)/(np.std(-np.diff(epoch_data,axis=1)))) /((np.std(-np.diff(epoch_data,axis=1)))/np.sqrt(activity))
epochFeatures['complexity'].append(complexity)
specEnt = np.zeros(shape=(len(raw.ch_names),))
for iter in range(6):
ampSpec=np.abs(np.fft.fft(epoch_data[0,:])) / np.sum(np.abs(np.fft.fft(epoch_data[0,:])))
specEnt[iter]=-np.sum(ampSpec * np.log2(ampSpec))
epochFeatures['spectral_entropy'].append(np.mean(specEnt))
dist_list_plv = np.zeros(shape=(len(raw.ch_names),len(raw.ch_names)))
dist_list_pli = np.zeros(shape=(len(raw.ch_names),len(raw.ch_names)))
for node_1 in range(len(raw.ch_names)):
for node_2 in range(len(raw.ch_names)):
if node_1 != node_2:
data_1 = epoch_data[node_1,:]
data_2 = epoch_data[node_2,:]
PLV=phase_locking_value(np.angle(signal.hilbert(data_1,axis=0)),
np.angle(signal.hilbert(data_2,axis=0)))
dist_list_plv[node_1,node_2]=np.abs(np.mean(PLV))
PLI=np.angle(signal.hilbert(data_1,axis=0))-np.angle(signal.hilbert(data_2,axis=0))
dist_list_pli[node_1,node_2]=np.abs(np.mean(np.sign(PLI)))
temp_connection.append(dist_list_plv)
temp_connection.append(dist_list_pli)
try:
if labels[ii+2] ==1:
title_label='spindle'
else:
title_label=''
except:
title_label=''
#fig,ax = plt.subplots(figsize=(10,25))
con_res=dict()
for method, c in zip(con_methods,temp_connection):
con_res[method] = c
colors=plt.cm.rainbow(np.linspace(0,1,len(raw.ch_names)))
time_plot = np.linspace(epochs[str(ii+2)].events[0][0]/raw.info['sfreq']-0.2*(epochs[str(ii+2)].events[0][0]/raw.info['sfreq']),
epochs[str(ii+2)].events[0][0]/raw.info['sfreq']+duration,
epoch_data.shape[1])
for plv_threshold,pli_threshold,cc_threshold in zip(plv_threshold_set,pli_threshold_set,cc_threshold_set):
thresholds = {'plv':plv_threshold,'pli':pli_threshold,'coh':cc_threshold}
for jj, method in enumerate(con_methods):
fig,ax = plt.subplots(figsize=(16,16))
mne.viz.plot_connectivity_circle(np.array(con_res[method]>thresholds[method],dtype=int),raw.ch_names,fig=fig,show=False,
title='%s,threshold:%.2f,%s'%(method,thresholds[method],title_label),facecolor='black',textcolor='white',
colorbar=False,fontsize_title=22,fontsize_names=22,
subplot=221,node_colors=colors,
)
adjecency_df = pd.DataFrame(np.array(con_res[method]>thresholds[method],dtype=int),columns=np.arange(1,len(raw.ch_names)+1))
adjecency_df.to_csv('epoch_%s_%.2f\\epoch_%d_%.2f(%s).csv'%(method.upper(),duration,ii+1,thresholds[method],title_label))
axes = fig.add_subplot(212)
ax = fig.add_subplot(222)
for kk,(name,color) in enumerate(zip(raw.ch_names,colors)):
ax.plot(time_plot,epoch_data[kk,:],label=name,color=color)
band_pass_data = mne.filter.filter_data(epoch_data[kk,:],raw.info['sfreq'],fmin,fmax)
axes.plot(time_plot,band_pass_data,label=name,color=color)
ax.legend(loc='upper right')
ax.set_title('%.2f-%.2f sec %s'%(time_plot.min(),time_plot.max(),title_label),color='w')
ax.set_xlabel('Time',color='w')
ax.set_ylabel('$\mu$V',color='w')
plt.setp(plt.getp(ax, 'yticklabels'), color='w') #set yticklabels color
plt.setp(plt.getp(ax, 'xticklabels'), color='w') #set xticklabels color
axes.legend(loc='upper right')
axes.set_title('band pass data %.2f-%.2f Hz %s'%(fmin,fmax,title_label),color='w')
axes.set_xlabel('Time',color='w')
axes.set_ylabel('$\mu$V',color='w')
plt.setp(plt.getp(axes, 'yticklabels'), color='w') #set yticklabels color
plt.setp(plt.getp(axes, 'xticklabels'), color='w') #set xticklabels color
fig.set_facecolor('black')
fig.savefig('epoch_%s_%.2f\\epoch_%d_%.2f(%s).png'%(method.upper(),duration,ii+1,thresholds[method],title_label),
facecolor=fig.get_facecolor(), edgecolor='none')
plt.close('all')
#connection.append(temp_connection)
epochFeatures = pd.DataFrame(epochFeatures)
a,b=mne.time_frequency.psd_multitaper(epochs,fmin=8,fmax=16)
epochFeatures['skewness_of_amplitude_spectrum']=np.mean(stats.skew(a,axis=2),1)
epochFeatures['spindle']=labels[1:]
return epochFeatures
evoked_data = np.mean(epochs_data, axis=0)
evokeds = mne.EvokedArray(evoked_data, info=info, tmin=-0.2,
comment='Arbitrary', nave=nave)
evokeds.plot(picks=picks, show=True, units={'mag': '-'},
titles={'mag': 'sin and cos averaged'}, time_unit='s')
###############################################################################
# Create epochs by windowing the raw data.
# The events are spaced evenly every 1 second.
duration = 1.
# create a fixed size events array
# start=0 and stop=None by default
events = mne.make_fixed_length_events(raw, event_id, duration=duration)
print(events)
# for fixed size events no start time before and after event
tmin = 0.
tmax = 0.99 # inclusive tmax, 1 second epochs
# create :class:`Epochs <mne.Epochs>` object
epochs = mne.Epochs(raw, events=events, event_id=event_id, tmin=tmin,
tmax=tmax, baseline=None, verbose=True)
epochs.plot(scalings='auto', block=True)
###############################################################################
# Create overlapping epochs using :func:`mne.make_fixed_length_events` (50 %
# overlap). This also roughly doubles the amount of events compared to the
# previous event list.
def test_low_rank():
"""Test low-rank covariance matrix estimation."""
raw = read_raw_fif(raw_fname).set_eeg_reference(projection=True).crop(0, 3)
raw = maxwell_filter(raw, regularize=None) # heavily reduce the rank
sss_proj_rank = 139 # 80 MEG + 60 EEG - 1 proj
n_ch = 366
proj_rank = 365 # one EEG proj
events = make_fixed_length_events(raw)
methods = ('empirical', 'diagonal_fixed', 'oas')
epochs = Epochs(raw, events, tmin=-0.2, tmax=0, preload=True)
bounds = {
'None': dict(empirical=(-6000, -5000),
diagonal_fixed=(-1500, -500),
oas=(-700, -600)),
'full': dict(empirical=(-9000, -8000),
diagonal_fixed=(-2000, -1600),
oas=(-1600, -1000)),
}
for rank in ('full', None):
covs = compute_covariance(
epochs, method=methods, return_estimators=True,
verbose='error', rank=rank)
for cov in covs:
method = cov['method']
these_bounds = bounds[str(rank)][method]
this_rank = _cov_rank(cov, epochs.info)
if rank is None or method == 'empirical':
assert this_rank == sss_proj_rank
else:
assert this_rank == proj_rank
assert these_bounds[0] < cov['loglik'] < these_bounds[1], \
(rank, method)
if method == 'empirical':
emp_cov = cov # save for later, rank param does not matter
# Test equivalence with mne.cov.regularize subspace
with pytest.raises(ValueError, match='are dependent.*must equal'):
regularize(emp_cov, epochs.info, rank=None, mag=0.1, grad=0.2)
assert _cov_rank(emp_cov, epochs.info) == sss_proj_rank
reg_cov = regularize(emp_cov, epochs.info, proj=True, rank='full')
assert _cov_rank(reg_cov, epochs.info) == proj_rank
del reg_cov
with catch_logging() as log:
reg_r_cov = regularize(emp_cov, epochs.info, proj=True, rank=None,
verbose=True)
log = log.getvalue()
assert 'jointly' in log
assert _cov_rank(reg_r_cov, epochs.info) == sss_proj_rank
reg_r_only_cov = regularize(emp_cov, epochs.info, proj=False, rank=None)
assert _cov_rank(reg_r_only_cov, epochs.info) == sss_proj_rank
assert_allclose(reg_r_only_cov['data'], reg_r_cov['data'])
del reg_r_only_cov, reg_r_cov
# test that rank=306 is same as rank='full'
epochs_meg = epochs.copy().pick_types()
assert len(epochs_meg.ch_names) == 306
epochs_meg.info.update(bads=[], projs=[])
cov_full = compute_covariance(epochs_meg, method='oas',
rank='full', verbose='error')
assert _cov_rank(cov_full, epochs_meg.info) == 306
cov_dict = compute_covariance(epochs_meg, method='oas',
rank=306, verbose='error')
assert _cov_rank(cov_dict, epochs_meg.info) == 306
assert_allclose(cov_full['data'], cov_dict['data'])
# Work with just EEG data to simplify projection / rank reduction
raw.pick_types(meg=False, eeg=True)
n_proj = 2
raw.add_proj(compute_proj_raw(raw, n_eeg=n_proj))
n_ch = len(raw.ch_names)
rank = n_ch - n_proj - 1 # plus avg proj
assert len(raw.info['projs']) == 3
epochs = Epochs(raw, events, tmin=-0.2, tmax=0, preload=True)
assert len(raw.ch_names) == n_ch
emp_cov = compute_covariance(epochs, rank='full', verbose='error')
assert _cov_rank(emp_cov, epochs.info) == rank
reg_cov = regularize(emp_cov, epochs.info, proj=True, rank='full')
assert _cov_rank(reg_cov, epochs.info) == rank
reg_r_cov = regularize(emp_cov, epochs.info, proj=False, rank=None)
assert _cov_rank(reg_r_cov, epochs.info) == rank
dia_cov = compute_covariance(epochs, rank=None, method='diagonal_fixed',
verbose='error')
assert _cov_rank(dia_cov, epochs.info) == rank
assert_allclose(dia_cov['data'], reg_cov['data'])
# test our deprecation: can simply remove later
epochs.pick_channels(epochs.ch_names[:103])
# degenerate
with pytest.raises(ValueError, match='can.*only be used with rank="full"'):
compute_covariance(epochs, rank=None, method='pca')
with pytest.raises(ValueError, match='can.*only be used with rank="full"'):
compute_covariance(epochs, rank=None, method='factor_analysis')
# define parameters
fname = data_path() + '/SubjectCMC.ds'
raw = mne.io.read_raw_ctf(fname)
raw.crop(50., 250.).load_data() # crop for memory purposes
# Filter muscular activity to only keep high frequencies
emg = raw.copy().pick_channels(['EMGlft'])
emg.filter(20., None)
# Filter MEG data to focus on alpha band
raw.pick_types(meg=True, ref_meg=True, eeg=False, eog=False)
raw.filter(15., 30., method='iir')
# Build epochs as sliding windows over the continuous raw file
events = mne.make_fixed_length_events(raw, id=1, duration=.250)
# Epoch length is 1.5 second
meg_epochs = Epochs(raw, events, tmin=0., tmax=1.500, baseline=None,
detrend=1, decim=8)
emg_epochs = Epochs(emg, events, tmin=0., tmax=1.500, baseline=None)
# Prepare classification
X = meg_epochs.get_data()
y = emg_epochs.get_data().var(axis=2)[:, 0] # target is EMG power
# Classification pipeline with SPoC spatial filtering and Ridge Regression
clf = make_pipeline(SPoC(n_components=2, log=True, reg='oas'), Ridge())
# Define a two fold cross-validation
cv = KFold(n_splits=2, shuffle=False)
os.makedirs('example')
os.chdir('example')
raw_file = 'D:\\NING - spindle\\training set\\suj29_l5nap_day1.fif'
annotation_file = 'D:\\NING - spindle\\training set\\suj29_nap_day1_edited_annotations.txt'
raw = mne.io.read_raw_fif(raw_file,preload=True,)
annotation = pd.read_csv(annotation_file)
montage = "standard_1020"
montage = mne.channels.read_montage(montage)
raw.set_montage(montage)
raw.set_channel_types({'LOc':'eog','ROc':'eog'})
channelList = ['F3','F4','C3','C4','O1','O2']
raw.pick_channels(channelList)
picks = mne.pick_types(raw.info,meg=False,eeg=True,eog=False,stim=False)
raw.notch_filter(np.arange(60,241,60),picks=picks,filter_length='auto',phase='zero')
raw.filter(1,40,filter_length='auto',phase='zero',h_trans_bandwidth='auto')
for duration in epoch_set:
gold_standard = read_annotation(raw,annotation)
manual_labels = discritized_onset_label_manual(raw,gold_standard,duration)
event_array = mne.make_fixed_length_events(raw,id=1,duration=float(duration))
#event_array[:,1] = duration * raw.info['sfreq']
#event_array[:,-1] = np.arange(1,len(event_array)+1)
epochFeatures=compute_plv_pli_cc(raw,duration,plv_threshold_set,pli_threshold_set,cc_threshold_set,manual_labels)
if not os.path.exists('feature'):
os.makedirs('feature')
epochFeatures.to_csv('feature\\feature_%.2f.csv'%(duration))