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# Authors: Alexandre Gramfort <alexandre.gramfort@telecom-paristech.fr>
# Denis Engemann <denis.engemann@gmail.com>
# Martin Luessi <mluessi@nmr.mgh.harvard.edu>
# Eric Larson <larson.eric.d@gmail.com>
#
# License: Simplified BSD
import os.path as op
import warnings
import numpy as np
# Set our plotters to test mode
import matplotlib
matplotlib.use('Agg') # for testing don't use X server
import matplotlib.pyplot as plt
from mne import io, read_events, Epochs
from mne import pick_types
from mne.layouts import read_layout
from mne.datasets import sample
from mne.viz import plot_drop_log, plot_image_epochs
warnings.simplefilter('always') # enable b/c these tests throw warnings
data_dir = sample.data_path(download=False)
subjects_dir = op.join(data_dir, 'subjects')
ecg_fname = op.join(data_dir, 'MEG', 'sample', 'sample_audvis_ecg_proj.fif')
base_dir = op.join(op.dirname(__file__), '..', '..', 'io', 'tests', 'data')
evoked_fname = op.join(base_dir, 'test-ave.fif')
raw_fname = op.join(base_dir, 'test_raw.fif')
cov_fname = op.join(base_dir, 'test-cov.fif')
event_name = op.join(base_dir, 'test-eve.fif')
event_id, tmin, tmax = 1, -0.1, 0.1
n_chan = 15
layout = read_layout('Vectorview-all')
def _get_raw():
return io.Raw(raw_fname, preload=False)
def _get_events():
return read_events(event_name)
def _get_picks(raw):
return pick_types(raw.info, meg=True, eeg=False, stim=False,
ecg=False, eog=False, exclude='bads')
def _get_epochs():
raw = _get_raw()
events = _get_events()
picks = _get_picks(raw)
# Use a subset of channels for plotting speed
picks = np.round(np.linspace(0, len(picks) + 1, n_chan)).astype(int)
epochs = Epochs(raw, events[:5], event_id, tmin, tmax, picks=picks,
baseline=(None, 0))
return epochs
def _get_epochs_delayed_ssp():
raw = _get_raw()
events = _get_events()
picks = _get_picks(raw)
reject = dict(mag=4e-12)
epochs_delayed_ssp = Epochs(raw, events[:10], event_id, tmin, tmax,
picks=picks, baseline=(None, 0),
proj='delayed', reject=reject)
return epochs_delayed_ssp
def test_plot_epochs():
""" Test plotting epochs
"""
epochs = _get_epochs()
epochs.plot([0, 1], picks=[0, 2, 3], scalings=None, title_str='%s')
epochs[0].plot(picks=[0, 2, 3], scalings=None, title_str='%s')
# test clicking: should increase coverage on
# 3200-3226, 3235, 3237, 3239-3242, 3245-3255, 3260-3280
fig = plt.gcf()
fig.canvas.button_press_event(10, 10, 'left')
# now let's add a bad channel
epochs.info['bads'] = [epochs.ch_names[0]] # include a bad one
epochs.plot([0, 1], picks=[0, 2, 3], scalings=None, title_str='%s')
epochs[0].plot(picks=[0, 2, 3], scalings=None, title_str='%s')
plt.close('all')
def test_plot_image_epochs():
"""Test plotting of epochs image
"""
epochs = _get_epochs()
plot_image_epochs(epochs, picks=[1, 2])
plt.close('all')
def test_plot_drop_log():
"""Test plotting a drop log
"""
epochs = _get_epochs()
epochs.drop_bad_epochs()
warnings.simplefilter('always', UserWarning)
with warnings.catch_warnings(record=True):
epochs.plot_drop_log()
plot_drop_log([['One'], [], []])
plot_drop_log([['One'], ['Two'], []])
plot_drop_log([['One'], ['One', 'Two'], []])
plt.close('all')
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