Sensitivity map of SSP projections¶

# Author: Alexandre Gramfort <alexandre.gramfort@telecom-paristech.fr>
#
# License: BSD (3-clause)

import matplotlib.pyplot as plt

from mne import read_forward_solution, read_proj, sensitivity_map
from mne.datasets import sample

print(__doc__)

data_path = sample.data_path()

subjects_dir = data_path + '/subjects'
fname = data_path + '/MEG/sample/sample_audvis-meg-eeg-oct-6-fwd.fif'
ecg_fname = data_path + '/MEG/sample/sample_audvis_ecg-proj.fif'

fwd = read_forward_solution(fname, surf_ori=True)
projs = read_proj(ecg_fname)
# take only one projection per channel type
projs = projs[::2]

# Compute sensitivity map
ssp_ecg_map = sensitivity_map(fwd, ch_type='grad', projs=projs, mode='angle')