def computeSspProj(self, events, tmin, tmax, event_id, n_eeg):
"""
Computes SSP projection vectors and adds them to the raw data.
Parameters:
events - A list of events for creating the epochs.
tmin - Starting time before event for the epochs.
tmax - Ending time after the event for the epochs.
event_id - The id of the event to consider.
n_eeg - The number of vectors for EEG channels.
"""
# Extract EOG epochs from raw data
try:
eog_epochs = mne.Epochs(self.raw,
events,
event_id=event_id,
tmin=tmin,
tmax=tmax)
except Exception as e:
print "Could not create epochs.\n"
print str(e)
return []
# Average EOG epochs
try:
eog_evoked = eog_epochs.average()
# Compute SSPs
proj = mne.compute_proj_evoked(eog_evoked, n_eeg=n_eeg)
self.raw.add_proj(proj)
except Exception as e:
print "Error while computing projections.\n"
print str(e)
return []
return proj
def test_compute_proj_epochs():
"""Test SSP computation on epochs"""
event_id, tmin, tmax = 1, -0.2, 0.3
raw = Raw(raw_fname, preload=True)
events = read_events(event_fname)
bad_ch = 'MEG 2443'
picks = pick_types(raw.info, meg=True, eeg=False, stim=False, eog=False,
exclude=[])
epochs = Epochs(raw, events, event_id, tmin, tmax, picks=picks,
baseline=None, proj=False)
evoked = epochs.average()
projs = compute_proj_epochs(epochs, n_grad=1, n_mag=1, n_eeg=0, n_jobs=1)
write_proj(op.join(tempdir, 'proj.fif.gz'), projs)
for p_fname in [proj_fname, proj_gz_fname,
op.join(tempdir, 'proj.fif.gz')]:
projs2 = read_proj(p_fname)
assert_true(len(projs) == len(projs2))
for p1, p2 in zip(projs, projs2):
assert_true(p1['desc'] == p2['desc'])
assert_true(p1['data']['col_names'] == p2['data']['col_names'])
assert_true(p1['active'] == p2['active'])
# compare with sign invariance
p1_data = p1['data']['data'] * np.sign(p1['data']['data'][0, 0])
p2_data = p2['data']['data'] * np.sign(p2['data']['data'][0, 0])
if bad_ch in p1['data']['col_names']:
bad = p1['data']['col_names'].index('MEG 2443')
mask = np.ones(p1_data.size, dtype=np.bool)
mask[bad] = False
p1_data = p1_data[:, mask]
p2_data = p2_data[:, mask]
corr = np.corrcoef(p1_data, p2_data)[0, 1]
assert_array_almost_equal(corr, 1.0, 5)
# test that you can compute the projection matrix
projs = activate_proj(projs)
proj, nproj, U = make_projector(projs, epochs.ch_names, bads=[])
assert_true(nproj == 2)
assert_true(U.shape[1] == 2)
# test that you can save them
epochs.info['projs'] += projs
evoked = epochs.average()
evoked.save(op.join(tempdir, 'foo.fif'))
projs = read_proj(proj_fname)
projs_evoked = compute_proj_evoked(evoked, n_grad=1, n_mag=1, n_eeg=0)
assert_true(len(projs_evoked) == 2)
# XXX : test something
# test parallelization
projs = compute_proj_epochs(epochs, n_grad=1, n_mag=1, n_eeg=0, n_jobs=2)
projs = activate_proj(projs)
proj_par, _, _ = make_projector(projs, epochs.ch_names, bads=[])
assert_allclose(proj, proj_par, rtol=1e-8, atol=1e-16)
def test_plot_joint():
"""Test joint plot."""
evoked = _get_epochs().average()
evoked.plot_joint(ts_args=dict(time_unit='s'),
topomap_args=dict(time_unit='s'))
def return_inds(d): # to test function kwarg to zorder arg of evoked.plot
return list(range(d.shape[0]))
evoked.plot_joint(title='test', topomap_args=dict(contours=0, res=8,
time_unit='ms'),
ts_args=dict(spatial_colors=True, zorder=return_inds,
time_unit='s'))
pytest.raises(ValueError, evoked.plot_joint, ts_args=dict(axes=True,
time_unit='s'))
axes = plt.subplots(nrows=3)[-1].flatten().tolist()
evoked.plot_joint(times=[0], picks=[6, 7, 8], ts_args=dict(axes=axes[0]),
topomap_args={"axes": axes[1:], "time_unit": "s"})
with pytest.raises(ValueError, match='array of length 6'):
evoked.plot_joint(picks=[6, 7, 8], ts_args=dict(axes=axes[0]),
topomap_args=dict(axes=axes[2:]))
plt.close('all')
# test proj options
assert len(evoked.info['projs']) == 0
evoked.pick_types(meg=True)
evoked.add_proj(compute_proj_evoked(
evoked, n_mag=1, n_grad=1, meg='combined'))
assert len(evoked.info['projs']) == 1
with pytest.raises(ValueError, match='must match ts_args'):
evoked.plot_joint(ts_args=dict(proj=True),
topomap_args=dict(proj=False))
evoked.plot_joint(ts_args=dict(proj='reconstruct'),
topomap_args=dict(proj='reconstruct'))
plt.close('all')
def test_plot_joint():
"""Test joint plot."""
evoked = _get_epochs().average()
evoked.plot_joint(ts_args=dict(time_unit='s'),
topomap_args=dict(time_unit='s'))
def return_inds(d): # to test function kwarg to zorder arg of evoked.plot
return list(range(d.shape[0]))
evoked.plot_joint(title='test',
topomap_args=dict(contours=0, res=8, time_unit='ms'),
ts_args=dict(spatial_colors=True,
zorder=return_inds,
time_unit='s'))
with pytest.raises(ValueError, match='If one of `ts_args` and'):
evoked.plot_joint(ts_args=dict(axes=True, time_unit='s'))
axes = plt.subplots(nrows=3)[-1].flatten().tolist()
evoked.plot_joint(times=[0],
picks=[6, 7, 8],
ts_args=dict(axes=axes[0]),
topomap_args={
"axes": axes[1:],
"time_unit": "s"
})
with pytest.raises(ValueError, match='array of length 6'):
evoked.plot_joint(picks=[6, 7, 8],
ts_args=dict(axes=axes[0]),
topomap_args=dict(axes=axes[2:]))
plt.close('all')
# test proj options
assert len(evoked.info['projs']) == 0
evoked.pick_types(meg=True)
evoked.add_proj(
compute_proj_evoked(evoked, n_mag=1, n_grad=1, meg='combined'))
assert len(evoked.info['projs']) == 1
with pytest.raises(ValueError, match='must match ts_args'):
evoked.plot_joint(ts_args=dict(proj=True),
topomap_args=dict(proj=False))
evoked.plot_joint(ts_args=dict(proj='reconstruct'),
topomap_args=dict(proj='reconstruct'))
plt.close('all')
# test sEEG (gh:8733)
evoked.del_proj().pick_types('mag') # avoid overlapping positions error
mapping = {ch_name: 'seeg' for ch_name in evoked.ch_names}
with pytest.warns(RuntimeWarning, match='The unit .* has changed from .*'):
evoked.set_channel_types(mapping)
evoked.plot_joint()
# test DBS (gh:8739)
evoked = _get_epochs().average().pick_types('mag')
mapping = {ch_name: 'dbs' for ch_name in evoked.ch_names}
with pytest.warns(RuntimeWarning, match='The unit for'):
evoked.set_channel_types(mapping)
evoked.plot_joint()
plt.close('all')
def test_plot_topomap_interactive():
"""Test interactive topomap projection plotting."""
import matplotlib.pyplot as plt
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
from matplotlib.figure import Figure
evoked = read_evokeds(evoked_fname, baseline=(None, 0))[0]
evoked.pick_types(meg='mag')
evoked.info['projs'] = []
assert not evoked.proj
evoked.add_proj(compute_proj_evoked(evoked, n_mag=1))
plt.close('all')
fig = Figure()
canvas = FigureCanvas(fig)
ax = fig.gca()
kwargs = dict(vmin=-240,
vmax=240,
times=[0.1],
colorbar=False,
axes=ax,
res=8,
time_unit='s')
evoked.copy().plot_topomap(proj=False, **kwargs)
canvas.draw()
image_noproj = np.frombuffer(canvas.tostring_rgb(), dtype='uint8')
assert len(plt.get_fignums()) == 1
ax.clear()
evoked.copy().plot_topomap(proj=True, **kwargs)
canvas.draw()
image_proj = np.frombuffer(canvas.tostring_rgb(), dtype='uint8')
assert not np.array_equal(image_noproj, image_proj)
assert len(plt.get_fignums()) == 1
ax.clear()
evoked.copy().plot_topomap(proj='interactive', **kwargs)
canvas.draw()
image_interactive = np.frombuffer(canvas.tostring_rgb(), dtype='uint8')
assert_array_equal(image_noproj, image_interactive)
assert not np.array_equal(image_proj, image_interactive)
assert len(plt.get_fignums()) == 2
proj_fig = plt.figure(plt.get_fignums()[-1])
_fake_click(proj_fig, proj_fig.axes[0], [0.5, 0.5], xform='data')
canvas.draw()
image_interactive_click = np.frombuffer(canvas.tostring_rgb(),
dtype='uint8')
assert_array_equal(image_proj, image_interactive_click)
assert not np.array_equal(image_noproj, image_interactive_click)
_fake_click(proj_fig, proj_fig.axes[0], [0.5, 0.5], xform='data')
canvas.draw()
image_interactive_click = np.frombuffer(canvas.tostring_rgb(),
dtype='uint8')
assert_array_equal(image_noproj, image_interactive_click)
assert not np.array_equal(image_proj, image_interactive_click)
def test_plot_topomap_interactive():
"""Test interactive topomap projection plotting."""
import matplotlib.pyplot as plt
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
from matplotlib.figure import Figure
evoked = read_evokeds(evoked_fname, baseline=(None, 0))[0]
evoked.pick_types(meg='mag')
evoked.info['projs'] = []
assert not evoked.proj
evoked.add_proj(compute_proj_evoked(evoked, n_mag=1))
plt.close('all')
fig = Figure()
canvas = FigureCanvas(fig)
ax = fig.gca()
kwargs = dict(vmin=-240, vmax=240, times=[0.1], colorbar=False, axes=ax,
res=8, time_unit='s')
evoked.copy().plot_topomap(proj=False, **kwargs)
canvas.draw()
image_noproj = np.frombuffer(canvas.tostring_rgb(), dtype='uint8')
assert len(plt.get_fignums()) == 1
ax.clear()
evoked.copy().plot_topomap(proj=True, **kwargs)
canvas.draw()
image_proj = np.frombuffer(canvas.tostring_rgb(), dtype='uint8')
assert not np.array_equal(image_noproj, image_proj)
assert len(plt.get_fignums()) == 1
ax.clear()
evoked.copy().plot_topomap(proj='interactive', **kwargs)
canvas.draw()
image_interactive = np.frombuffer(canvas.tostring_rgb(), dtype='uint8')
assert_array_equal(image_noproj, image_interactive)
assert not np.array_equal(image_proj, image_interactive)
assert len(plt.get_fignums()) == 2
proj_fig = plt.figure(plt.get_fignums()[-1])
_fake_click(proj_fig, proj_fig.axes[0], [0.5, 0.5], xform='data')
canvas.draw()
image_interactive_click = np.frombuffer(
canvas.tostring_rgb(), dtype='uint8')
assert_array_equal(image_proj, image_interactive_click)
assert not np.array_equal(image_noproj, image_interactive_click)
_fake_click(proj_fig, proj_fig.axes[0], [0.5, 0.5], xform='data')
canvas.draw()
image_interactive_click = np.frombuffer(
canvas.tostring_rgb(), dtype='uint8')
assert_array_equal(image_noproj, image_interactive_click)
assert not np.array_equal(image_proj, image_interactive_click)
def test_compute_proj():
"""Test SSP computation"""
event_id, tmin, tmax = 1, -0.2, 0.3
raw = Raw(raw_fname)
events = read_events(event_fname)
exclude = []
bad_ch = 'MEG 2443'
picks = pick_types(raw.info, meg=True, eeg=False, stim=False, eog=False,
exclude=exclude)
epochs = Epochs(raw, events, event_id, tmin, tmax, picks=picks,
baseline=None, proj=False)
evoked = epochs.average()
projs = compute_proj_epochs(epochs, n_grad=1, n_mag=1, n_eeg=0)
projs2 = read_proj(proj_fname)
assert_true(len(projs) == len(projs2))
for p1, p2 in zip(projs, projs2):
assert_true(p1['desc'] == p2['desc'])
assert_true(p1['data']['col_names'] == p2['data']['col_names'])
assert_true(p1['active'] == p2['active'])
# compare with sign invariance
p1_data = p1['data']['data'] * np.sign(p1['data']['data'][0, 0])
p2_data = p2['data']['data'] * np.sign(p2['data']['data'][0, 0])
if bad_ch in p1['data']['col_names']:
bad = p1['data']['col_names'].index('MEG 2443')
mask = np.ones(p1_data.size, dtype=np.bool)
mask[bad] = False
p1_data = p1_data[:, mask]
p2_data = p2_data[:, mask]
corr = np.corrcoef(p1_data, p2_data)[0, 1]
assert_array_almost_equal(corr, 1.0, 7)
# test that you can compute the projection matrix
projs = activate_proj(projs)
proj, nproj, U = make_projector(projs, epochs.ch_names, bads=[])
assert_true(nproj == 2)
assert_true(U.shape[1] == 2)
# test that you can save them
epochs.info['projs'] += projs
evoked = epochs.average()
evoked.save('foo.fif')
projs = read_proj(proj_fname)
projs_evoked = compute_proj_evoked(evoked, n_grad=1, n_mag=1, n_eeg=0)
def test_plot_projs_joint():
"""Test plot_projs_joint."""
evoked = read_evokeds(evoked_fname)[0].apply_baseline((None, 0))
evoked.info['bads'] = []
n_mag, n_grad, n_eeg = 9, 10, 11
n_mag_proj, n_grad_proj, n_eeg_proj = 2, 2, 1
# We pick in this weird order to ensure our plotting order follows it
picks = np.concatenate([
pick_types(evoked.info, meg='grad')[:n_grad],
pick_types(evoked.info, meg=False, eeg=True)[:n_eeg],
pick_types(evoked.info, meg='mag')[:n_mag],
])
evoked.pick(picks)
assert len(evoked.ch_names) == n_mag + n_grad + n_eeg
assert evoked.get_channel_types(unique=True) == ['grad', 'eeg', 'mag']
projs = compute_proj_evoked(evoked,
n_mag=n_mag_proj,
n_grad=n_grad_proj,
n_eeg=n_eeg_proj)
assert len(projs) == 5
with pytest.warns(RuntimeWarning, match='aliasing'):
evoked.crop(-0.1, 0.1).decimate(10)
topomap_kwargs = dict(res=8, contours=0, sensors=False)
fig = plot_projs_joint(projs,
evoked,
topomap_kwargs=topomap_kwargs,
verbose='error')
ylab = fig.axes[0].get_ylabel()
assert ylab.startswith('Grad'), ylab
ylab = fig.axes[4].get_ylabel()
assert ylab.startswith('EEG'), ylab
ylab = fig.axes[7].get_ylabel()
assert ylab.startswith('Mag'), ylab
mag_trace_ax_idx = 10
mag_trace_ax = fig.axes[mag_trace_ax_idx]
assert mag_trace_ax.get_ylabel() == ''
assert len(mag_trace_ax.lines) == n_mag + 2 * n_mag_proj
old_len = len(mag_trace_ax.lines)
assert len(fig.axes) == 11 # 3x4
fig = plot_projs_joint(projs,
evoked,
picks_trace='MEG 0111',
topomap_kwargs=topomap_kwargs,
verbose='error')
assert len(fig.axes[mag_trace_ax_idx].lines) == old_len + 1
def test_plot_evoked_reconstruct(picks, rlims, avg_proj):
"""Test proj="reconstruct"."""
evoked = _get_epochs(picks=picks).average()
if avg_proj:
evoked.set_eeg_reference(projection=True).apply_proj()
assert len(evoked.info['projs']) == 1
assert evoked.proj is True
else:
assert len(evoked.info['projs']) == 0
assert evoked.proj is False
fig = evoked.plot(proj=True,
hline=[1],
exclude=[],
window_title='foo',
time_unit='s')
amplitudes = _get_amplitudes(fig)
assert len(amplitudes) == len(picks)
assert evoked.proj is avg_proj
fig = evoked.plot(proj='reconstruct', exclude=[])
amplitudes_recon = _get_amplitudes(fig)
if avg_proj is False:
assert_allclose(amplitudes, amplitudes_recon)
proj = compute_proj_evoked(evoked.copy().crop(None, 0).apply_proj())
evoked.add_proj(proj)
assert len(evoked.info['projs']) == 2 if len(picks) == 3 else 4
fig = evoked.plot(proj=True, exclude=[])
amplitudes_proj = _get_amplitudes(fig)
fig = evoked.plot(proj='reconstruct', exclude=[])
amplitudes_recon = _get_amplitudes(fig)
assert len(amplitudes_recon) == len(picks)
norm = np.linalg.norm(amplitudes)
norm_proj = np.linalg.norm(amplitudes_proj)
norm_recon = np.linalg.norm(amplitudes_recon)
r = np.dot(amplitudes_recon.ravel(),
amplitudes.ravel()) / (norm_recon * norm)
assert rlims[0] < r < rlims[1]
assert 1.05 * norm_proj < norm_recon
if not avg_proj:
assert norm_proj < norm * 0.9
cov = read_cov(cov_fname)
with pytest.raises(ValueError, match='Cannot use proj="reconstruct"'):
evoked.plot(noise_cov=cov, proj='reconstruct')
plt.close('all')
raw.notch_filter(np.arange(60, 181, 60))
events = mne.find_events(raw, stim_channel='UPPT001')
# pick MEG channels
picks = mne.pick_types(raw.info, meg=True, eeg=False, stim=False, eog=True,
exclude='bads')
# Compute epochs
epochs = mne.Epochs(raw, events, event_id, tmin, tmax, picks=picks,
baseline=(None, 0), reject=reject, preload=False)
# compute evoked
evoked = epochs.average()
# remove physiological artifacts (eyeblinks, heartbeats) using SSP on baseline
evoked.add_proj(mne.compute_proj_evoked(evoked.crop(tmax=0, copy=True)))
evoked.apply_proj()
# fix stim artifact
mne.preprocessing.fix_stim_artifact(evoked)
# correct delays due to hardware (stim artifact is at 4 ms)
evoked.shift_time(-0.004)
# plot the result
evoked.plot()
# show topomaps
evoked.plot_topomap(times=np.array([0.016, 0.030, 0.060, 0.070]))
def compute_proj_wrap(epochs, average, **kwargs):
if average:
return compute_proj_evoked(epochs.average(), **kwargs)
else:
return compute_proj_epochs(epochs, **kwargs)
def compute_proj_ecg(in_path, in_fif_fname, tmin, tmax, n_grad, n_mag, n_eeg,
l_freq, h_freq, average, filter_length, n_jobs, ch_name,
reject, avg_ref, bads, preload, flat):
"""Compute SSP/PCA projections for ECG/EOG artifacts
Parameters
----------
in_fif_fname: string
Raw fif File
XXX
"""
if in_fif_fname.endswith('_raw.fif') or in_fif_fname.endswith('-raw.fif'):
prefix = in_fif_fname[:-8]
else:
prefix = in_fif_fname[:-4]
ecg_event_fname = in_path + 'ssp/' + prefix + '_ecg-eve.fif'
if average:
ecg_proj_fname = in_path + 'ssp/' + prefix + '_ecg_avg_proj.fif'
out_fif_fname = in_path + 'ssp/' + prefix + '_ecg_avg_proj_raw.fif'
else:
ecg_proj_fname = in_path + 'ssp/' + prefix + '_ecg_proj.fif'
out_fif_fname = in_path + 'ssp/' + prefix + '_ecg_proj_raw.fif'
print 'Reading fif File'
in_fif_fname = in_path + in_fif_fname
raw = mne.fiff.Raw(in_fif_fname, preload=preload)
# if (in_path == '/cluster/kuperberg/SemPrMM/MEG/data/ya30/'):
# save after 84s of MEG data in FIF file
# raw = raw[: , 84:]
#raw.save('sample_audvis_meg_raw.fif', tmin=84)
print 'Running ECG SSP computation'
ecg_events, _, _ = mne.artifacts.find_ecg_events(raw, ch_name=ch_name)
print "Writing ECG events in %s" % ecg_event_fname
mne.write_events(ecg_event_fname, ecg_events)
make_lingua(ecg_event_fname)
if avg_ref:
print "Adding average EEG reference projection."
eeg_proj = mne.fiff.proj.make_eeg_average_ref_proj(raw.info)
raw.info['projs'].append(eeg_proj)
print 'Computing ECG projector'
# Handler rejection parameters
if len(mne.fiff.pick_types(raw.info, meg='grad', eeg=False,
eog=False)) == 0:
del reject['grad']
if len(mne.fiff.pick_types(raw.info, meg='mag', eeg=False,
eog=False)) == 0:
del reject['mag']
if len(mne.fiff.pick_types(raw.info, meg=False, eeg=True, eog=False)) == 0:
del reject['eeg']
if len(mne.fiff.pick_types(raw.info, meg=False, eeg=False, eog=True)) == 0:
del reject['eog']
picks = mne.fiff.pick_types(raw.info,
meg=True,
eeg=True,
eog=True,
exclude=raw.info['bads'] + bads)
if l_freq is None and h_freq is not None:
raw.high_pass_filter(picks, h_freq, filter_length, n_jobs)
if l_freq is not None and h_freq is None:
raw.low_pass_filter(picks, h_freq, filter_length, n_jobs)
if l_freq is not None and h_freq is not None:
raw.band_pass_filter(picks, l_freq, h_freq, filter_length, n_jobs)
epochs_ecg = mne.Epochs(raw,
ecg_events,
None,
tmin,
tmax,
baseline=None,
picks=picks,
reject=reject,
proj=True)
print epochs_ecg
projs_init = raw.info['projs']
if average:
evoked_ecg = epochs_ecg.average()
projs_ecg = mne.compute_proj_evoked(evoked_ecg,
n_grad=n_grad,
n_mag=n_mag,
n_eeg=n_eeg)
else:
print epochs_ecg, n_grad, n_mag, n_eeg
projs_ecg = mne.compute_proj_epochs(epochs_ecg,
n_grad=n_grad,
n_mag=n_mag,
n_eeg=n_eeg)
print "Writing ECG projections in %s" % ecg_proj_fname
mne.write_proj(
ecg_proj_fname, projs_ecg + projs_init
) ## Original Projections written along with the ecg projections.
print "Writing ECG projections in %s" % ecg_proj_fname
mne.write_proj(ecg_proj_fname, projs_ecg)
return in_fif_fname, ecg_proj_fname, out_fif_fname
def test_compute_proj():
"""Test SSP computation"""
event_id, tmin, tmax = 1, -0.2, 0.3
raw = Raw(raw_fname, preload=True)
events = read_events(event_fname)
exclude = []
bad_ch = 'MEG 2443'
picks = pick_types(raw.info, meg=True, eeg=False, stim=False, eog=False,
exclude=exclude)
epochs = Epochs(raw, events, event_id, tmin, tmax, picks=picks,
baseline=None, proj=False)
evoked = epochs.average()
projs = compute_proj_epochs(epochs, n_grad=1, n_mag=1, n_eeg=0, n_jobs=1)
write_proj('proj.fif.gz', projs)
for p_fname in [proj_fname, proj_gz_fname, 'proj.fif.gz']:
projs2 = read_proj(p_fname)
assert_true(len(projs) == len(projs2))
for p1, p2 in zip(projs, projs2):
assert_true(p1['desc'] == p2['desc'])
assert_true(p1['data']['col_names'] == p2['data']['col_names'])
assert_true(p1['active'] == p2['active'])
# compare with sign invariance
p1_data = p1['data']['data'] * np.sign(p1['data']['data'][0, 0])
p2_data = p2['data']['data'] * np.sign(p2['data']['data'][0, 0])
if bad_ch in p1['data']['col_names']:
bad = p1['data']['col_names'].index('MEG 2443')
mask = np.ones(p1_data.size, dtype=np.bool)
mask[bad] = False
p1_data = p1_data[:, mask]
p2_data = p2_data[:, mask]
corr = np.corrcoef(p1_data, p2_data)[0, 1]
assert_array_almost_equal(corr, 1.0, 5)
# test that you can compute the projection matrix
projs = activate_proj(projs)
proj, nproj, U = make_projector(projs, epochs.ch_names, bads=[])
assert_true(nproj == 2)
assert_true(U.shape[1] == 2)
# test that you can save them
epochs.info['projs'] += projs
evoked = epochs.average()
evoked.save('foo.fif')
projs = read_proj(proj_fname)
projs_evoked = compute_proj_evoked(evoked, n_grad=1, n_mag=1, n_eeg=0)
# XXX : test something
# test parallelization
projs = compute_proj_epochs(epochs, n_grad=1, n_mag=1, n_eeg=0, n_jobs=2)
projs = activate_proj(projs)
proj_par, _, _ = make_projector(projs, epochs.ch_names, bads=[])
assert_array_equal(proj, proj_par)
# Test that the raw projectors work
for ii in (1, 2, 4, 8, 12, 24):
raw = Raw(raw_fname)
projs = compute_proj_raw(raw, duration=ii-0.1, n_grad=1, n_mag=1,
n_eeg=0)
# test that you can compute the projection matrix
projs = activate_proj(projs)
proj, nproj, U = make_projector(projs, epochs.ch_names, bads=[])
assert_true(nproj == 2)
assert_true(U.shape[1] == 2)
# test that you can save them
raw.info['projs'] += projs
raw.save('foo_%d_raw.fif' % ii)
# Test that purely continuous (no duration) raw projection works
raw = Raw(raw_fname)
projs = compute_proj_raw(raw, duration=None, n_grad=1, n_mag=1, n_eeg=0)
# test that you can compute the projection matrix
projs = activate_proj(projs)
proj, nproj, U = make_projector(projs, epochs.ch_names, bads=[])
assert_true(nproj == 2)
assert_true(U.shape[1] == 2)
# test that you can save them
raw.info['projs'] += projs
raw.save('foo_rawproj_continuous_raw.fif')
def compute_proj_ecg(in_path, in_fif_fname, tmin, tmax, n_grad, n_mag, n_eeg, l_freq, h_freq, average, filter_length, n_jobs, ch_name, reject, avg_ref, bads, preload, flat):
"""Compute SSP/PCA projections for ECG/EOG artifacts
Parameters
----------
in_fif_fname: string
Raw fif File
XXX
"""
if in_fif_fname.endswith('_raw.fif') or in_fif_fname.endswith('-raw.fif'):
prefix = in_fif_fname[:-8]
else:
prefix = in_fif_fname[:-4]
ecg_event_fname = in_path + 'ssp/' + prefix + '_ecg-eve.fif'
if average:
ecg_proj_fname = in_path + 'ssp/' + prefix + '_ecg_avg_proj.fif'
out_fif_fname = in_path + 'ssp/' + prefix + '_ecg_avg_proj_raw.fif'
else:
ecg_proj_fname = in_path + 'ssp/' + prefix + '_ecg_proj.fif'
out_fif_fname = in_path + 'ssp/' + prefix + '_ecg_proj_raw.fif'
print 'Reading fif File'
in_fif_fname = in_path + in_fif_fname
raw = mne.fiff.Raw(in_fif_fname, preload=preload)
# if (in_path == '/cluster/kuperberg/SemPrMM/MEG/data/ya30/'):
# save after 84s of MEG data in FIF file
# raw = raw[: , 84:]
#raw.save('sample_audvis_meg_raw.fif', tmin=84)
print 'Running ECG SSP computation'
ecg_events, _, _ = mne.artifacts.find_ecg_events(raw, ch_name=ch_name)
print "Writing ECG events in %s" % ecg_event_fname
mne.write_events(ecg_event_fname, ecg_events)
make_lingua(ecg_event_fname)
if avg_ref:
print "Adding average EEG reference projection."
eeg_proj = mne.fiff.proj.make_eeg_average_ref_proj(raw.info)
raw.info['projs'].append(eeg_proj)
print 'Computing ECG projector'
# Handler rejection parameters
if len(mne.fiff.pick_types(raw.info, meg='grad', eeg=False, eog=False)) == 0:
del reject['grad']
if len(mne.fiff.pick_types(raw.info, meg='mag', eeg=False, eog=False)) == 0:
del reject['mag']
if len(mne.fiff.pick_types(raw.info, meg=False, eeg=True, eog=False)) == 0:
del reject['eeg']
if len(mne.fiff.pick_types(raw.info, meg=False, eeg=False, eog=True)) == 0:
del reject['eog']
picks = mne.fiff.pick_types(raw.info, meg=True, eeg=True, eog=True,
exclude=raw.info['bads'] + bads)
if l_freq is None and h_freq is not None:
raw.high_pass_filter(picks, h_freq, filter_length, n_jobs)
if l_freq is not None and h_freq is None:
raw.low_pass_filter(picks, h_freq, filter_length, n_jobs)
if l_freq is not None and h_freq is not None:
raw.band_pass_filter(picks, l_freq, h_freq, filter_length, n_jobs)
epochs_ecg = mne.Epochs(raw, ecg_events, None, tmin, tmax, baseline=None,
picks=picks, reject=reject, proj=True)
print epochs_ecg
projs_init = raw.info['projs']
if average:
evoked_ecg = epochs_ecg.average()
projs_ecg = mne.compute_proj_evoked(evoked_ecg, n_grad=n_grad, n_mag=n_mag,
n_eeg=n_eeg)
else:
print epochs_ecg, n_grad, n_mag, n_eeg
projs_ecg = mne.compute_proj_epochs(epochs_ecg, n_grad=n_grad, n_mag=n_mag,
n_eeg=n_eeg)
print "Writing ECG projections in %s" % ecg_proj_fname
mne.write_proj(ecg_proj_fname, projs_ecg + projs_init) ## Original Projections written along with the ecg projections.
print "Writing ECG projections in %s" % ecg_proj_fname
mne.write_proj(ecg_proj_fname, projs_ecg)
return in_fif_fname, ecg_proj_fname, out_fif_fname
def test_compute_proj_epochs(tmp_path):
"""Test SSP computation on epochs."""
tempdir = str(tmp_path)
event_id, tmin, tmax = 1, -0.2, 0.3
raw = read_raw_fif(raw_fname, preload=True)
events = read_events(event_fname)
bad_ch = 'MEG 2443'
picks = pick_types(raw.info,
meg=True,
eeg=False,
stim=False,
eog=False,
exclude=[])
epochs = Epochs(raw,
events,
event_id,
tmin,
tmax,
picks=picks,
baseline=None,
proj=False)
evoked = epochs.average()
projs = compute_proj_epochs(epochs, n_grad=1, n_mag=1, n_eeg=0, n_jobs=1)
write_proj(op.join(tempdir, 'test-proj.fif.gz'), projs)
for p_fname in [
proj_fname, proj_gz_fname,
op.join(tempdir, 'test-proj.fif.gz')
]:
projs2 = read_proj(p_fname)
assert len(projs) == len(projs2)
for p1, p2 in zip(projs, projs2):
assert p1['desc'] == p2['desc']
assert p1['data']['col_names'] == p2['data']['col_names']
assert p1['active'] == p2['active']
# compare with sign invariance
p1_data = p1['data']['data'] * np.sign(p1['data']['data'][0, 0])
p2_data = p2['data']['data'] * np.sign(p2['data']['data'][0, 0])
if bad_ch in p1['data']['col_names']:
bad = p1['data']['col_names'].index('MEG 2443')
mask = np.ones(p1_data.size, dtype=bool)
mask[bad] = False
p1_data = p1_data[:, mask]
p2_data = p2_data[:, mask]
corr = np.corrcoef(p1_data, p2_data)[0, 1]
assert_array_almost_equal(corr, 1.0, 5)
if p2['explained_var']:
assert_array_almost_equal(p1['explained_var'],
p2['explained_var'])
# test that you can compute the projection matrix
projs = activate_proj(projs)
proj, nproj, U = make_projector(projs, epochs.ch_names, bads=[])
assert nproj == 2
assert U.shape[1] == 2
# test that you can save them
with epochs.info._unlock():
epochs.info['projs'] += projs
evoked = epochs.average()
evoked.save(op.join(tempdir, 'foo-ave.fif'))
projs = read_proj(proj_fname)
projs_evoked = compute_proj_evoked(evoked, n_grad=1, n_mag=1, n_eeg=0)
assert len(projs_evoked) == 2
# XXX : test something
# test parallelization
projs = compute_proj_epochs(epochs,
n_grad=1,
n_mag=1,
n_eeg=0,
n_jobs=1,
desc_prefix='foobar')
assert all('foobar' in x['desc'] for x in projs)
projs = activate_proj(projs)
proj_par, _, _ = make_projector(projs, epochs.ch_names, bads=[])
assert_allclose(proj, proj_par, rtol=1e-8, atol=1e-16)
# test warnings on bad filenames
proj_badname = op.join(tempdir, 'test-bad-name.fif.gz')
with pytest.warns(RuntimeWarning, match='-proj.fif'):
write_proj(proj_badname, projs)
with pytest.warns(RuntimeWarning, match='-proj.fif'):
read_proj(proj_badname)
# bad inputs
fname = op.join(tempdir, 'out-proj.fif')
with pytest.raises(TypeError, match='projs'):
write_proj(fname, 'foo')
with pytest.raises(TypeError, match=r'projs\[0\] must be .*'):
write_proj(fname, ['foo'])
def test_compute_proj_epochs():
"""Test SSP computation on epochs."""
tempdir = _TempDir()
event_id, tmin, tmax = 1, -0.2, 0.3
raw = read_raw_fif(raw_fname, preload=True)
events = read_events(event_fname)
bad_ch = "MEG 2443"
picks = pick_types(raw.info, meg=True, eeg=False, stim=False, eog=False, exclude=[])
epochs = Epochs(raw, events, event_id, tmin, tmax, picks=picks, baseline=None, proj=False)
evoked = epochs.average()
projs = compute_proj_epochs(epochs, n_grad=1, n_mag=1, n_eeg=0, n_jobs=1)
write_proj(op.join(tempdir, "test-proj.fif.gz"), projs)
for p_fname in [proj_fname, proj_gz_fname, op.join(tempdir, "test-proj.fif.gz")]:
projs2 = read_proj(p_fname)
assert_true(len(projs) == len(projs2))
for p1, p2 in zip(projs, projs2):
assert_true(p1["desc"] == p2["desc"])
assert_true(p1["data"]["col_names"] == p2["data"]["col_names"])
assert_true(p1["active"] == p2["active"])
# compare with sign invariance
p1_data = p1["data"]["data"] * np.sign(p1["data"]["data"][0, 0])
p2_data = p2["data"]["data"] * np.sign(p2["data"]["data"][0, 0])
if bad_ch in p1["data"]["col_names"]:
bad = p1["data"]["col_names"].index("MEG 2443")
mask = np.ones(p1_data.size, dtype=np.bool)
mask[bad] = False
p1_data = p1_data[:, mask]
p2_data = p2_data[:, mask]
corr = np.corrcoef(p1_data, p2_data)[0, 1]
assert_array_almost_equal(corr, 1.0, 5)
if p2["explained_var"]:
assert_array_almost_equal(p1["explained_var"], p2["explained_var"])
# test that you can compute the projection matrix
projs = activate_proj(projs)
proj, nproj, U = make_projector(projs, epochs.ch_names, bads=[])
assert_true(nproj == 2)
assert_true(U.shape[1] == 2)
# test that you can save them
epochs.info["projs"] += projs
evoked = epochs.average()
evoked.save(op.join(tempdir, "foo-ave.fif"))
projs = read_proj(proj_fname)
projs_evoked = compute_proj_evoked(evoked, n_grad=1, n_mag=1, n_eeg=0)
assert_true(len(projs_evoked) == 2)
# XXX : test something
# test parallelization
projs = compute_proj_epochs(epochs, n_grad=1, n_mag=1, n_eeg=0, n_jobs=2, desc_prefix="foobar")
assert_true(all("foobar" in x["desc"] for x in projs))
projs = activate_proj(projs)
proj_par, _, _ = make_projector(projs, epochs.ch_names, bads=[])
assert_allclose(proj, proj_par, rtol=1e-8, atol=1e-16)
# test warnings on bad filenames
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter("always")
proj_badname = op.join(tempdir, "test-bad-name.fif.gz")
write_proj(proj_badname, projs)
read_proj(proj_badname)
assert_naming(w, "test_proj.py", 2)
def test_compute_proj_epochs():
"""Test SSP computation on epochs"""
tempdir = _TempDir()
event_id, tmin, tmax = 1, -0.2, 0.3
raw = Raw(raw_fname, preload=True)
events = read_events(event_fname)
bad_ch = 'MEG 2443'
picks = pick_types(raw.info,
meg=True,
eeg=False,
stim=False,
eog=False,
exclude=[])
epochs = Epochs(raw,
events,
event_id,
tmin,
tmax,
picks=picks,
baseline=None,
proj=False)
evoked = epochs.average()
projs = compute_proj_epochs(epochs, n_grad=1, n_mag=1, n_eeg=0, n_jobs=1)
write_proj(op.join(tempdir, 'test-proj.fif.gz'), projs)
for p_fname in [
proj_fname, proj_gz_fname,
op.join(tempdir, 'test-proj.fif.gz')
]:
projs2 = read_proj(p_fname)
assert_true(len(projs) == len(projs2))
for p1, p2 in zip(projs, projs2):
assert_true(p1['desc'] == p2['desc'])
assert_true(p1['data']['col_names'] == p2['data']['col_names'])
assert_true(p1['active'] == p2['active'])
# compare with sign invariance
p1_data = p1['data']['data'] * np.sign(p1['data']['data'][0, 0])
p2_data = p2['data']['data'] * np.sign(p2['data']['data'][0, 0])
if bad_ch in p1['data']['col_names']:
bad = p1['data']['col_names'].index('MEG 2443')
mask = np.ones(p1_data.size, dtype=np.bool)
mask[bad] = False
p1_data = p1_data[:, mask]
p2_data = p2_data[:, mask]
corr = np.corrcoef(p1_data, p2_data)[0, 1]
assert_array_almost_equal(corr, 1.0, 5)
if p2['explained_var']:
assert_array_almost_equal(p1['explained_var'],
p2['explained_var'])
# test that you can compute the projection matrix
projs = activate_proj(projs)
proj, nproj, U = make_projector(projs, epochs.ch_names, bads=[])
assert_true(nproj == 2)
assert_true(U.shape[1] == 2)
# test that you can save them
epochs.info['projs'] += projs
evoked = epochs.average()
evoked.save(op.join(tempdir, 'foo-ave.fif'))
projs = read_proj(proj_fname)
projs_evoked = compute_proj_evoked(evoked, n_grad=1, n_mag=1, n_eeg=0)
assert_true(len(projs_evoked) == 2)
# XXX : test something
# test parallelization
projs = compute_proj_epochs(epochs,
n_grad=1,
n_mag=1,
n_eeg=0,
n_jobs=2,
desc_prefix='foobar')
assert_true(all('foobar' in x['desc'] for x in projs))
projs = activate_proj(projs)
proj_par, _, _ = make_projector(projs, epochs.ch_names, bads=[])
assert_allclose(proj, proj_par, rtol=1e-8, atol=1e-16)
# test warnings on bad filenames
clean_warning_registry()
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter('always')
proj_badname = op.join(tempdir, 'test-bad-name.fif.gz')
write_proj(proj_badname, projs)
read_proj(proj_badname)
print([ww.message for ww in w])
assert_equal(len(w), 2)
try:
raw = mne.io.read_raw_fif(fname_raw)
except FileNotFoundError:
raw = mne.io.read_raw_fif(fname_mp_raw)
# TODO: replace with proper solution
raw = _handle_events_reading(events_fname, raw)
events, event_id = mne.events_from_annotations(raw)
event_id = {key: value for key, value in event_id.items()
if key in evts_labels}
epochs = mne.Epochs(raw, events, event_id, tmin=-.2, tmax=1,
baseline=baseline, reject=reject, verbose=False)
# compute the SSP
evoked = epochs.average()
ev_proj = evoked.copy().crop(-.1, .03)
projs = mne.compute_proj_evoked(ev_proj, n_mag=3)
# apply projector individually
evokeds = [evoked.copy().add_proj(proj).apply_proj() for proj in projs]
# 1. plot before and after summary
fig = plt.figure(figsize=(18, 8))
gs = gridspec.GridSpec(1, 2)
axes = [plt.subplot(gs[0]), plt.subplot(gs[1])]
# plot evoked
evoked.crop(-.1,.1).plot(titles={'mag': 'Before: Original Evoked'},
show=False,
axes=axes[0], ylim=ylim)
# remove all
evoked_proj = evoked.copy().add_proj(projs).apply_proj()
evoked_proj.plot(titles={'mag': 'After: Evoked - First 3 PCs'},
events = mne.find_events(raw, stim_channel='UPPT001')
# pick MEG channels
picks = mne.pick_types(raw.info, meg=True, eeg=False, stim=False, eog=True,
exclude='bads')
# Compute epochs
epochs = mne.Epochs(raw, events, event_id, tmin, tmax, picks=picks,
baseline=(None, 0), reject=reject, preload=False)
# compute evoked
evoked = epochs.average()
# remove physiological artifacts (eyeblinks, heartbeats) using SSP on baseline
evoked.add_proj(mne.compute_proj_evoked(evoked.copy().crop(tmax=0)))
evoked.apply_proj()
# fix stim artifact
mne.preprocessing.fix_stim_artifact(evoked)
# correct delays due to hardware (stim artifact is at 4 ms)
evoked.shift_time(-0.004)
# plot the result
evoked.plot(time_unit='s')
# show topomaps
evoked.plot_topomap(times=np.array([0.016, 0.030, 0.060, 0.070]),
time_unit='s')
def compute_proj_eog(in_path, in_fif_fname, tmin, tmax, n_grad, n_mag, n_eeg, l_freq, h_freq, average, filter_length, n_jobs, ch_name, reject, avg_ref, bads, preload):
#####Defining filenames
if in_fif_fname.endswith('_raw.fif') or in_fif_fname.endswith('-raw.fif'):
prefix = in_fif_fname[:-8]
else:
prefix = in_fif_fname[:-4]
eog_event_fname = in_path + 'ssp/'+ prefix + '_PYeog-eve.fif'
if average:
eog_proj_fname = in_path + 'ssp/' + prefix + '_eog_avg_proj.fif'
out_fif_fname = in_path + 'ssp/' + prefix + '_eog_avg_proj_raw.fif'
else:
eog_proj_fname = in_path + 'ssp/' + prefix + '_PYeog_proj.fif'
out_fif_fname = in_path + 'ssp/' + prefix + '_PYeog_proj_raw.fif'
####Reading in raw data
in_fif_fname = in_path + in_fif_fname
raw = mne.fiff.Raw(in_fif_fname, preload=preload)
print 'Running EOG SSP computation'
eog_events, _= mne.artifacts.find_eog_events(raw) # since our copy of the mne.artifacts.events.py script returns two parameters.
print "Writing EOG events in %s" % eog_event_fname
mne.write_events(eog_event_fname, eog_events)
make_lingua(eog_event_fname)
print 'Computing EOG projector'
# Handler rejection parameters
if len(mne.fiff.pick_types(raw.info, meg='grad', eeg=False, ecg=False)) == 0:
del reject['grad']
if len(mne.fiff.pick_types(raw.info, meg='mag', eeg=False, ecg=False)) == 0:
del reject['mag']
if len(mne.fiff.pick_types(raw.info, meg=False, eeg=True, ecg=False)) == 0:
del reject['eeg']
if len(mne.fiff.pick_types(raw.info, meg=False, eeg=False, ecg=True)) == 0:
del reject['ecg']
picks_eog = mne.fiff.pick_types(raw.info, meg=True, eeg=True, ecg=True,
exclude=raw.info['bads'] + bads)
if l_freq is None and h_freq is not None:
raw.high_pass_filter(picks, h_freq, filter_length, n_jobs)
if l_freq is not None and h_freq is None:
raw.low_pass_filter(picks, h_freq, filter_length, n_jobs)
if l_freq is not None and h_freq is not None:
raw.band_pass_filter(picks_eog, l_freq, h_freq, filter_length, n_jobs)
epochs_eog = mne.Epochs(raw, eog_events, None, tmin, tmax, baseline=None,
picks=picks_eog, reject=reject, proj=True)
projs_init = raw.info['projs']
if average:
evoked_eog = epochs_eog.average()
projs_eog = mne.compute_proj_evoked(evoked_eog, n_grad=n_grad, n_mag=n_mag,
n_eeg=n_eeg)
else:
print epochs_eog, n_grad, n_mag, n_eeg
projs_eog = mne.compute_proj_epochs(epochs_eog, n_grad=n_grad, n_mag=n_mag,
n_eeg=n_eeg)
print "Writing EOG projections in %s" % eog_proj_fname
mne.write_proj(eog_proj_fname, projs_eog)
return in_fif_fname, eog_proj_fname, out_fif_fname
events = mne.find_events(raw, stim_channel='UPPT001')
# pick MEG channels
picks = mne.pick_types(raw.info, meg=True, eeg=False, stim=False, eog=True,
exclude='bads')
# Compute epochs
epochs = mne.Epochs(raw, events, event_id, tmin, tmax, picks=picks,
baseline=(None, 0), reject=reject, preload=False)
# compute evoked
evoked = epochs.average()
# remove physiological artifacts (eyeblinks, heartbeats) using SSP on baseline
evoked.add_proj(mne.compute_proj_evoked(evoked.copy().crop(tmax=0)))
evoked.apply_proj()
# fix stim artifact
mne.preprocessing.fix_stim_artifact(evoked)
# correct delays due to hardware (stim artifact is at 4 ms)
evoked.shift_time(-0.004)
# plot the result
evoked.plot(time_unit='s')
# show topomaps
evoked.plot_topomap(times=np.array([0.016, 0.030, 0.060, 0.070]),
time_unit='s')
def test_plot_topomap_interactive(constrained_layout):
"""Test interactive topomap projection plotting."""
evoked = read_evokeds(evoked_fname, baseline=(None, 0))[0]
evoked.pick_types(meg='mag')
evoked.info['projs'] = []
assert not evoked.proj
evoked.add_proj(compute_proj_evoked(evoked, n_mag=1))
plt.close('all')
fig, ax = plt.subplots(constrained_layout=constrained_layout)
canvas = fig.canvas
kwargs = dict(vmin=-240,
vmax=240,
times=[0.1],
colorbar=False,
axes=ax,
res=8,
time_unit='s')
evoked.copy().plot_topomap(proj=False, **kwargs)
canvas.draw()
image_noproj = np.frombuffer(canvas.tostring_rgb(), dtype='uint8')
assert len(plt.get_fignums()) == 1
ax.clear()
evoked.copy().plot_topomap(proj=True, **kwargs)
canvas.draw()
image_proj = np.frombuffer(canvas.tostring_rgb(), dtype='uint8')
assert not np.array_equal(image_noproj, image_proj)
assert len(plt.get_fignums()) == 1
ax.clear()
evoked.copy().plot_topomap(proj='interactive', **kwargs)
canvas.draw()
image_interactive = np.frombuffer(canvas.tostring_rgb(), dtype='uint8')
assert_array_equal(image_noproj, image_interactive)
assert not np.array_equal(image_proj, image_interactive)
assert len(plt.get_fignums()) == 2
proj_fig = plt.figure(plt.get_fignums()[-1])
assert len(proj_fig.axes[0].lines) == 2
for line in proj_fig.axes[0].lines:
assert not line.get_visible()
_fake_click(proj_fig, proj_fig.axes[0], [0.5, 0.5], xform='data')
assert len(proj_fig.axes[0].lines) == 2
for line in proj_fig.axes[0].lines:
assert line.get_visible()
canvas.draw()
image_interactive_click = np.frombuffer(canvas.tostring_rgb(),
dtype='uint8')
corr = np.corrcoef(image_proj.ravel(), image_interactive_click.ravel())[0,
1]
assert 0.99 < corr <= 1
corr = np.corrcoef(image_noproj.ravel(),
image_interactive_click.ravel())[0, 1]
assert 0.85 < corr < 0.9
_fake_click(proj_fig, proj_fig.axes[0], [0.5, 0.5], xform='data')
canvas.draw()
image_interactive_click = np.frombuffer(canvas.tostring_rgb(),
dtype='uint8')
corr = np.corrcoef(image_noproj.ravel(),
image_interactive_click.ravel())[0, 1]
assert 0.99 < corr <= 1
corr = np.corrcoef(image_proj.ravel(), image_interactive_click.ravel())[0,
1]
assert 0.85 < corr < 0.9
raw.notch_filter(np.arange(60, 181, 60))
events = mne.find_events(raw, stim_channel='UPPT001')
# pick MEG channels
picks = mne.pick_types(raw.info, meg=True, eeg=False, stim=False, eog=True,
exclude='bads')
# Compute epochs
epochs = mne.Epochs(raw, events, event_id, tmin, tmax, picks=picks,
baseline=(None, 0), reject=reject, preload=False)
# compute evoked
evoked = epochs.average()
# remove physiological artifacts (eyeblinks, heartbeats) using SSP on baseline
evoked.add_proj(mne.compute_proj_evoked(evoked.crop(tmax=0, copy=True)))
evoked.apply_proj()
# fix stim artifact
mne.preprocessing.fix_stim_artifact(evoked)
# correct delays due to hardware (stim artifact is at 4 ms)
evoked.shift_time(-0.004)
# plot the result
evoked.plot()
# show topomaps
evoked.plot_topomap(times=np.array([0.016, 0.030, 0.060, 0.070]))
def compute_proj_eog(in_path, in_fif_fname, tmin, tmax, n_grad, n_mag, n_eeg,
l_freq, h_freq, average, filter_length, n_jobs, ch_name,
reject, avg_ref, bads, preload):
#####Defining filenames
if in_fif_fname.endswith('_raw.fif') or in_fif_fname.endswith('-raw.fif'):
prefix = in_fif_fname[:-8]
else:
prefix = in_fif_fname[:-4]
eog_event_fname = in_path + 'ssp/' + prefix + '_PYeog-eve.fif'
if average:
eog_proj_fname = in_path + 'ssp/' + prefix + '_eog_avg_proj.fif'
out_fif_fname = in_path + 'ssp/' + prefix + '_eog_avg_proj_raw.fif'
else:
eog_proj_fname = in_path + 'ssp/' + prefix + '_PYeog_proj.fif'
out_fif_fname = in_path + 'ssp/' + prefix + '_PYeog_proj_raw.fif'
####Reading in raw data
in_fif_fname = in_path + in_fif_fname
raw = mne.fiff.Raw(in_fif_fname, preload=preload)
print 'Running EOG SSP computation'
eog_events, _ = mne.artifacts.find_eog_events(
raw
) # since our copy of the mne.artifacts.events.py script returns two parameters.
print "Writing EOG events in %s" % eog_event_fname
mne.write_events(eog_event_fname, eog_events)
make_lingua(eog_event_fname)
print 'Computing EOG projector'
# Handler rejection parameters
if len(mne.fiff.pick_types(raw.info, meg='grad', eeg=False,
ecg=False)) == 0:
del reject['grad']
if len(mne.fiff.pick_types(raw.info, meg='mag', eeg=False,
ecg=False)) == 0:
del reject['mag']
if len(mne.fiff.pick_types(raw.info, meg=False, eeg=True, ecg=False)) == 0:
del reject['eeg']
if len(mne.fiff.pick_types(raw.info, meg=False, eeg=False, ecg=True)) == 0:
del reject['ecg']
picks_eog = mne.fiff.pick_types(raw.info,
meg=True,
eeg=True,
ecg=True,
exclude=raw.info['bads'] + bads)
if l_freq is None and h_freq is not None:
raw.high_pass_filter(picks, h_freq, filter_length, n_jobs)
if l_freq is not None and h_freq is None:
raw.low_pass_filter(picks, h_freq, filter_length, n_jobs)
if l_freq is not None and h_freq is not None:
raw.band_pass_filter(picks_eog, l_freq, h_freq, filter_length, n_jobs)
epochs_eog = mne.Epochs(raw,
eog_events,
None,
tmin,
tmax,
baseline=None,
picks=picks_eog,
reject=reject,
proj=True)
projs_init = raw.info['projs']
if average:
evoked_eog = epochs_eog.average()
projs_eog = mne.compute_proj_evoked(evoked_eog,
n_grad=n_grad,
n_mag=n_mag,
n_eeg=n_eeg)
else:
print epochs_eog, n_grad, n_mag, n_eeg
projs_eog = mne.compute_proj_epochs(epochs_eog,
n_grad=n_grad,
n_mag=n_mag,
n_eeg=n_eeg)
print "Writing EOG projections in %s" % eog_proj_fname
mne.write_proj(eog_proj_fname, projs_eog)
return in_fif_fname, eog_proj_fname, out_fif_fname
def compute_proj_ecg(in_fif_fname, tmin, tmax, n_grad, n_mag, n_eeg, l_freq,
h_freq, average, preload, filter_length, n_jobs, ch_name,
reject, avg_ref, bads):
"""Compute SSP/PCA projections for ECG artifacts
Parameters
----------
in_fif_fname: string
Raw fif File
XXX
"""
# Reading fif File
raw = mne.fiff.Raw(in_fif_fname, preload=preload)
if in_fif_fname.endswith('_raw.fif') or in_fif_fname.endswith('-raw.fif'):
prefix = in_fif_fname[:-8]
else:
prefix = in_fif_fname[:-4]
ecg_event_fname = prefix + '_ecg-eve.fif'
if average:
ecg_proj_fname = prefix + '_ecg_avg_proj.fif'
else:
ecg_proj_fname = prefix + '_ecg_proj.fif'
print 'Running ECG SSP computation'
ecg_events, _, _ = mne.artifacts.find_ecg_events(raw, ch_name=ch_name)
print "Writing ECG events in %s" % ecg_event_fname
mne.write_events(ecg_event_fname, ecg_events)
if avg_ref:
print "Adding average EEG reference projection."
eeg_proj = mne.fiff.proj.make_eeg_average_ref_proj(raw.info)
raw.info['projs'].append(eeg_proj)
print 'Computing ECG projector'
# Handler rejection parameters
if len(mne.fiff.pick_types(raw.info, meg='grad', eeg=False, eog=False)) == 0:
del reject['grad']
if len(mne.fiff.pick_types(raw.info, meg='mag', eeg=False, eog=False)) == 0:
del reject['mag']
if len(mne.fiff.pick_types(raw.info, meg=False, eeg=True, eog=False)) == 0:
del reject['eeg']
if len(mne.fiff.pick_types(raw.info, meg=False, eeg=False, eog=True)) == 0:
del reject['eog']
picks = mne.fiff.pick_types(raw.info, meg=True, eeg=True, eog=True,
exclude=raw.info['bads'] + bads)
if l_freq is None and h_freq is not None:
raw.high_pass_filter(picks, h_freq, filter_length, n_jobs)
if l_freq is not None and h_freq is None:
raw.low_pass_filter(picks, h_freq, filter_length, n_jobs)
if l_freq is not None and h_freq is not None:
raw.band_pass_filter(picks, l_freq, h_freq, filter_length, n_jobs)
epochs = mne.Epochs(raw, ecg_events, None, tmin, tmax, baseline=None,
picks=picks, reject=reject, proj=True)
projs_init = raw.info['projs']
if average:
evoked = epochs.average()
projs = mne.compute_proj_evoked(evoked, n_grad=n_grad, n_mag=n_mag,
n_eeg=n_eeg)
else:
projs = mne.compute_proj_epochs(epochs, n_grad=n_grad, n_mag=n_mag,
n_eeg=n_eeg)
if preload is not None and os.path.exists(preload):
os.remove(preload)
print "Writing ECG projections in %s" % ecg_proj_fname
mne.write_proj(ecg_proj_fname, projs + projs_init)
print 'Done.'
def test_compute_proj_epochs():
"""Test SSP computation on epochs."""
tempdir = _TempDir()
event_id, tmin, tmax = 1, -0.2, 0.3
raw = read_raw_fif(raw_fname, preload=True)
events = read_events(event_fname)
bad_ch = 'MEG 2443'
picks = pick_types(raw.info, meg=True, eeg=False, stim=False, eog=False,
exclude=[])
epochs = Epochs(raw, events, event_id, tmin, tmax, picks=picks,
baseline=None, proj=False)
evoked = epochs.average()
projs = compute_proj_epochs(epochs, n_grad=1, n_mag=1, n_eeg=0, n_jobs=1)
write_proj(op.join(tempdir, 'test-proj.fif.gz'), projs)
for p_fname in [proj_fname, proj_gz_fname,
op.join(tempdir, 'test-proj.fif.gz')]:
projs2 = read_proj(p_fname)
assert len(projs) == len(projs2)
for p1, p2 in zip(projs, projs2):
assert p1['desc'] == p2['desc']
assert p1['data']['col_names'] == p2['data']['col_names']
assert p1['active'] == p2['active']
# compare with sign invariance
p1_data = p1['data']['data'] * np.sign(p1['data']['data'][0, 0])
p2_data = p2['data']['data'] * np.sign(p2['data']['data'][0, 0])
if bad_ch in p1['data']['col_names']:
bad = p1['data']['col_names'].index('MEG 2443')
mask = np.ones(p1_data.size, dtype=np.bool)
mask[bad] = False
p1_data = p1_data[:, mask]
p2_data = p2_data[:, mask]
corr = np.corrcoef(p1_data, p2_data)[0, 1]
assert_array_almost_equal(corr, 1.0, 5)
if p2['explained_var']:
assert_array_almost_equal(p1['explained_var'],
p2['explained_var'])
# test that you can compute the projection matrix
projs = activate_proj(projs)
proj, nproj, U = make_projector(projs, epochs.ch_names, bads=[])
assert nproj == 2
assert U.shape[1] == 2
# test that you can save them
epochs.info['projs'] += projs
evoked = epochs.average()
evoked.save(op.join(tempdir, 'foo-ave.fif'))
projs = read_proj(proj_fname)
projs_evoked = compute_proj_evoked(evoked, n_grad=1, n_mag=1, n_eeg=0)
assert len(projs_evoked) == 2
# XXX : test something
# test parallelization
projs = compute_proj_epochs(epochs, n_grad=1, n_mag=1, n_eeg=0, n_jobs=1,
desc_prefix='foobar')
assert all('foobar' in x['desc'] for x in projs)
projs = activate_proj(projs)
proj_par, _, _ = make_projector(projs, epochs.ch_names, bads=[])
assert_allclose(proj, proj_par, rtol=1e-8, atol=1e-16)
# test warnings on bad filenames
proj_badname = op.join(tempdir, 'test-bad-name.fif.gz')
with pytest.warns(RuntimeWarning, match='-proj.fif'):
write_proj(proj_badname, projs)
with pytest.warns(RuntimeWarning, match='-proj.fif'):
read_proj(proj_badname)
