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%matplotlib inline
    
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# Authors: Eric Larson <larson.eric.d@gmail.com>
#
# License: BSD (3-clause)
from os import path as op
import mne
print(__doc__)
data_path = op.join(mne.datasets.testing.data_path(verbose=True), 'SSS')
pos = mne.chpi.read_head_pos(op.join(data_path, 'test_move_anon_raw.pos'))
    
Visualize the subject head movements as traces:
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mne.viz.plot_head_positions(pos, mode='traces')
    
Or we can visualize them as a continuous field (with the vectors pointing in the head-upward direction):
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mne.viz.plot_head_positions(pos, mode='field')