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"""
=================================
Plot SSP projections topographies
=================================
This example shows how to display topographies of SSP projection vectors.
The projections used are the ones correcting for ECG artifacts.
"""
# Author: Alexandre Gramfort <alexandre.gramfort@telecom-paristech.fr>
# Denis A. Engemann <denis.engemann@gmail.com>
# License: BSD (3-clause)
print(__doc__)
from mne import read_proj, find_layout, read_evokeds
from mne.datasets import sample
from mne import viz
data_path = sample.data_path()
ecg_fname = data_path + '/MEG/sample/sample_audvis_ecg_proj.fif'
ave_fname = data_path + '/MEG/sample/sample_audvis-ave.fif'
evoked = read_evokeds(ave_fname, condition='Left Auditory')
projs = read_proj(ecg_fname)
layouts = [find_layout(evoked.info, k) for k in 'meg', 'eeg']
viz.plot_projs_topomap(projs, layout=layouts)
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