"""

=========================================

Plotting head in helmet from a trans file

=========================================

In this example, the head is shown in the

MEG helmet along with the EEG electrodes in MRI

coordinate system. This allows assessing the

MEG <-> MRI coregistration quality.

"""

# Author: Mainak Jas <mainak@neuro.hut.fi>

#

# License: BSD (3-clause)

from mne import read_evokeds

from mne.datasets import sample

from mne.viz import plot_trans

print(__doc__)

data_path = sample.data_path()

data_path = sample.data_path()

subjects_dir = data_path + '/subjects'

evoked_fname = data_path + '/MEG/sample/sample_audvis-ave.fif'

trans_fname = data_path + '/MEG/sample/sample_audvis_raw-trans.fif'

condition = 'Left Auditory'

evoked = read_evokeds(evoked_fname, condition=condition, baseline=(-0.2, 0.0))

plot_trans(evoked.info, trans_fname, subject='sample',

subjects_dir=subjects_dir)