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# Authors: Alexandre Barachant <alexandre.barachant@gmail.com>
# Nicolas Barascud <nicolas.barascud@ens.fr>
#
# License: BSD (3-clause)
import os.path as op
from numpy.testing import (assert_array_almost_equal, assert_array_equal,
assert_equal)
import numpy as np
import scipy.io as sio
import pytest
from mne.datasets import testing
from mne.io import read_raw_edf
from mne.io.meas_info import DATE_NONE
from mne.io.tests.test_raw import _test_raw_reader
from mne.utils import run_tests_if_main
from mne import pick_types, find_events
data_path = testing.data_path(download=False)
gdf1_path = op.join(data_path, 'GDF', 'test_gdf_1.25')
gdf2_path = op.join(data_path, 'GDF', 'test_gdf_2.20')
@testing.requires_testing_data
def test_gdf_data():
"""Test reading raw GDF 1.x files."""
with pytest.warns(RuntimeWarning, match='Overlapping events'):
raw = read_raw_edf(gdf1_path + '.gdf', eog=None,
misc=None, preload=True, stim_channel='auto')
picks = pick_types(raw.info, meg=False, eeg=True, exclude='bads')
data, _ = raw[picks]
# this .npy was generated using the official biosig python package
raw_biosig = np.load(gdf1_path + '_biosig.npy')
raw_biosig = raw_biosig * 1e-6 # data are stored in microvolts
data_biosig = raw_biosig[picks]
# Assert data are almost equal
assert_array_almost_equal(data, data_biosig, 8)
# Test for stim channel
events = find_events(raw, shortest_event=1)
# The events are overlapping.
assert_array_equal(events[:, 0], raw._raw_extras[0]['events'][1][::2])
# Test events are encoded to stim channel.
events = find_events(raw)
evs = raw.find_edf_events()
assert (all([event in evs[1] for event in events[:, 0]]))
# gh-5604
assert raw.info['meas_date'] == DATE_NONE
with pytest.warns(RuntimeWarning, match='Overlapping events'):
_test_raw_reader(read_raw_edf, input_fname=gdf1_path + '.gdf',
eog=None, misc=None, stim_channel='auto')
@testing.requires_testing_data
def test_gdf2_data():
"""Test reading raw GDF 2.x files."""
raw = read_raw_edf(gdf2_path + '.gdf', eog=None, misc=None, preload=True,
stim_channel='STATUS')
nchan = raw.info['nchan']
ch_names = raw.ch_names # Renamed STATUS -> STI 014.
picks = pick_types(raw.info, meg=False, eeg=True, exclude='bads')
data, _ = raw[picks]
# This .mat was generated using the official biosig matlab package
mat = sio.loadmat(gdf2_path + '_biosig.mat')
data_biosig = mat['dat'] * 1e-6 # data are stored in microvolts
data_biosig = data_biosig[picks]
# Assert data are almost equal
assert_array_almost_equal(data, data_biosig, 8)
# Find events
events = find_events(raw, verbose=1)
events[:, 2] >>= 8 # last 8 bits are system events in biosemi files
assert_equal(events.shape[0], 2) # 2 events in file
assert_array_equal(events[:, 2], [20, 28])
with pytest.warns(RuntimeWarning, match='No events found'):
# header contains no events
raw = read_raw_edf(gdf2_path + '.gdf', stim_channel='auto')
assert_equal(nchan, raw.info['nchan']) # stim channel not constructed
assert_array_equal(ch_names[1:], raw.ch_names[1:])
# gh-5604
assert raw.info['meas_date'] == DATE_NONE
_test_raw_reader(read_raw_edf, input_fname=gdf2_path + '.gdf',
eog=None, misc=None, stim_channel='STATUS')
run_tests_if_main()
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