Plotting EEG sensors on the scalp

In this example, digitized EEG sensor locations are shown on the scalp.

Out:

Opening raw data file /home/circleci/mne_data/MNE-sample-data/MEG/sample/sample_audvis_raw.fif...
    Read a total of 3 projection items:
        PCA-v1 (1 x 102)  idle
        PCA-v2 (1 x 102)  idle
        PCA-v3 (1 x 102)  idle
    Range : 25800 ... 192599 =     42.956 ...   320.670 secs
Ready.
Using outer_skin.surf for head surface.

# Author: Eric Larson <larson.eric.d@gmail.com>
#
# License: BSD (3-clause)

import mne
from mne.viz import plot_alignment, set_3d_view

print(__doc__)

data_path = mne.datasets.sample.data_path()
subjects_dir = data_path + '/subjects'
trans = mne.read_trans(data_path + '/MEG/sample/sample_audvis_raw-trans.fif')
raw = mne.io.read_raw_fif(data_path + '/MEG/sample/sample_audvis_raw.fif')
# Plot electrode locations on scalp
fig = plot_alignment(raw.info, trans, subject='sample', dig=False,
                     eeg=['original', 'projected'], meg=[],
                     coord_frame='head', subjects_dir=subjects_dir)
# Set viewing angle
set_3d_view(figure=fig, azimuth=135, elevation=80)

Estimated memory usage: 14 MB

Visualize channel over epochs as an image How to plot topomaps the way EEGLAB does