def test_make_field_map_eeg():
"""Test interpolation of EEG field onto head
"""
evoked = read_evokeds(evoked_fname, condition='Left Auditory')
evoked.info['bads'] = ['MEG 2443', 'EEG 053'] # add some bads
surf = get_head_surf('sample', subjects_dir=subjects_dir)
# we must have trans if surface is in MRI coords
assert_raises(ValueError, _make_surface_mapping, evoked.info, surf, 'eeg')
evoked = pick_types_evoked(evoked, meg=False, eeg=True)
fmd = make_field_map(evoked,
trans_fname=trans_fname,
subject='sample',
subjects_dir=subjects_dir)
# trans is necessary for EEG only
assert_raises(RuntimeError,
make_field_map,
evoked,
trans_fname=None,
subject='sample',
subjects_dir=subjects_dir)
fmd = make_field_map(evoked,
trans_fname=trans_fname,
subject='sample',
subjects_dir=subjects_dir)
assert_true(len(fmd) == 1)
assert_array_equal(fmd[0]['data'].shape, (2562, 59)) # maps data onto surf
assert_true(len(fmd[0]['ch_names']), 59)
def test_meg_field_interpolation_helmet():
"""Test interpolation of MEG field onto helmet
"""
evoked = read_evoked(evoked_fname, setno='Left Auditory')
info = evoked.info
surf = get_meg_helmet_surf(info)
# let's reduce the number of channels by a bunch to speed it up
info['bads'] = info['ch_names'][:200]
# bad ch_type
assert_raises(ValueError, make_surface_mapping, info, surf, 'foo')
# bad mode
assert_raises(ValueError, make_surface_mapping, info, surf, 'meg',
mode='foo')
# no picks
evoked_eeg = pick_types_evoked(evoked, meg=False, eeg=True)
assert_raises(RuntimeError, make_surface_mapping, evoked_eeg.info,
surf, 'meg')
# bad surface def
nn = surf['nn']
del surf['nn']
assert_raises(KeyError, make_surface_mapping, info, surf, 'meg')
surf['nn'] = nn
cf = surf['coord_frame']
del surf['coord_frame']
assert_raises(KeyError, make_surface_mapping, info, surf, 'meg')
surf['coord_frame'] = cf
# now do it
data = make_surface_mapping(info, surf, 'meg', mode='fast')
assert_array_equal(data.shape, (304, 106)) # data onto surf
def test_make_field_map_meg():
"""Test interpolation of MEG field onto helmet
"""
evoked = read_evokeds(evoked_fname, condition='Left Auditory')
info = evoked.info
surf = get_meg_helmet_surf(info)
# let's reduce the number of channels by a bunch to speed it up
info['bads'] = info['ch_names'][:200]
# bad ch_type
assert_raises(ValueError, _make_surface_mapping, info, surf, 'foo')
# bad mode
assert_raises(ValueError,
_make_surface_mapping,
info,
surf,
'meg',
mode='foo')
# no picks
evoked_eeg = pick_types_evoked(evoked, meg=False, eeg=True)
assert_raises(RuntimeError, _make_surface_mapping, evoked_eeg.info, surf,
'meg')
# bad surface def
nn = surf['nn']
del surf['nn']
assert_raises(KeyError, _make_surface_mapping, info, surf, 'meg')
surf['nn'] = nn
cf = surf['coord_frame']
del surf['coord_frame']
assert_raises(KeyError, _make_surface_mapping, info, surf, 'meg')
surf['coord_frame'] = cf
# now do it with make_field_map
evoked = pick_types_evoked(evoked, meg=True, eeg=False)
fmd = make_field_map(evoked,
trans_fname=None,
subject='sample',
subjects_dir=subjects_dir)
assert_true(len(fmd) == 1)
assert_array_equal(fmd[0]['data'].shape, (304, 106)) # maps data onto surf
assert_true(len(fmd[0]['ch_names']), 106)
assert_raises(ValueError, make_field_map, evoked, ch_type='foobar')
def test_make_field_map_meg():
"""Test interpolation of MEG field onto helmet
"""
evoked = read_evoked(evoked_fname, setno='Left Auditory')
info = evoked.info
surf = get_meg_helmet_surf(info)
# let's reduce the number of channels by a bunch to speed it up
info['bads'] = info['ch_names'][:200]
# bad ch_type
assert_raises(ValueError, _make_surface_mapping, info, surf, 'foo')
# bad mode
assert_raises(ValueError, _make_surface_mapping, info, surf, 'meg',
mode='foo')
# no picks
evoked_eeg = pick_types_evoked(evoked, meg=False, eeg=True)
assert_raises(RuntimeError, _make_surface_mapping, evoked_eeg.info,
surf, 'meg')
# bad surface def
nn = surf['nn']
del surf['nn']
assert_raises(KeyError, _make_surface_mapping, info, surf, 'meg')
surf['nn'] = nn
cf = surf['coord_frame']
del surf['coord_frame']
assert_raises(KeyError, _make_surface_mapping, info, surf, 'meg')
surf['coord_frame'] = cf
# now do it with make_field_map
evoked = pick_types_evoked(evoked, meg=True, eeg=False)
fmd = make_field_map(evoked, trans_fname=None,
subject='sample', subjects_dir=subjects_dir)
assert_true(len(fmd) == 1)
assert_array_equal(fmd[0]['data'].shape, (304, 106)) # maps data onto surf
assert_true(len(fmd[0]['ch_names']), 106)
assert_raises(ValueError, make_field_map, evoked, ch_type='foobar')
def test_make_field_map_eeg():
"""Test interpolation of EEG field onto head
"""
evoked = read_evokeds(evoked_fname, condition='Left Auditory')
evoked.info['bads'] = ['MEG 2443', 'EEG 053'] # add some bads
surf = get_head_surf('sample', subjects_dir=subjects_dir)
# we must have trans if surface is in MRI coords
assert_raises(ValueError, _make_surface_mapping, evoked.info, surf, 'eeg')
evoked = pick_types_evoked(evoked, meg=False, eeg=True)
fmd = make_field_map(evoked, trans_fname=trans_fname,
subject='sample', subjects_dir=subjects_dir)
# trans is necessary for EEG only
assert_raises(RuntimeError, make_field_map, evoked, trans_fname=None,
subject='sample', subjects_dir=subjects_dir)
fmd = make_field_map(evoked, trans_fname=trans_fname,
subject='sample', subjects_dir=subjects_dir)
assert_true(len(fmd) == 1)
assert_array_equal(fmd[0]['data'].shape, (2562, 59)) # maps data onto surf
assert_true(len(fmd[0]['ch_names']), 59)
