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# Authors: Eric Larson <larson.eric.d@gmail.com>
#
# License: BSD (3-clause)
import os
from os import path as op
import shutil
import warnings
import numpy as np
from nose.tools import assert_raises, assert_true, assert_false
from numpy.testing import assert_allclose, assert_array_equal, assert_equal
from mne import pick_types
from mne.tests.common import assert_dig_allclose
from mne.transforms import apply_trans
from mne.io import Raw, read_raw_ctf
from mne.io.tests.test_raw import _test_raw_reader
from mne.utils import _TempDir, run_tests_if_main, slow_test
from mne.datasets import testing, spm_face
ctf_dir = op.join(testing.data_path(download=False), 'CTF')
ctf_fname_continuous = 'testdata_ctf.ds'
ctf_fname_1_trial = 'testdata_ctf_short.ds'
ctf_fname_2_trials = 'testdata_ctf_pseudocontinuous.ds'
ctf_fname_discont = 'testdata_ctf_short_discontinuous.ds'
ctf_fname_somato = 'somMDYO-18av.ds'
ctf_fname_catch = 'catch-alp-good-f.ds'
block_sizes = {
ctf_fname_continuous: 12000,
ctf_fname_1_trial: 4801,
ctf_fname_2_trials: 12000,
ctf_fname_discont: 1201,
ctf_fname_somato: 313,
ctf_fname_catch: 2500,
}
single_trials = (
ctf_fname_continuous,
ctf_fname_1_trial,
)
ctf_fnames = tuple(sorted(block_sizes.keys()))
@slow_test
@testing.requires_testing_data
def test_read_ctf():
"""Test CTF reader"""
temp_dir = _TempDir()
out_fname = op.join(temp_dir, 'test_py_raw.fif')
# Create a dummy .eeg file so we can test our reading/application of it
os.mkdir(op.join(temp_dir, 'randpos'))
ctf_eeg_fname = op.join(temp_dir, 'randpos', ctf_fname_catch)
shutil.copytree(op.join(ctf_dir, ctf_fname_catch), ctf_eeg_fname)
with warnings.catch_warnings(record=True) as w: # reclassified ch
raw = _test_raw_reader(read_raw_ctf, directory=ctf_eeg_fname)
assert_true(all('MISC channel' in str(ww.message) for ww in w))
picks = pick_types(raw.info, meg=False, eeg=True)
pos = np.random.RandomState(42).randn(len(picks), 3)
fake_eeg_fname = op.join(ctf_eeg_fname, 'catch-alp-good-f.eeg')
# Create a bad file
with open(fake_eeg_fname, 'wb') as fid:
fid.write('foo\n'.encode('ascii'))
assert_raises(RuntimeError, read_raw_ctf, ctf_eeg_fname)
# Create a good file
with open(fake_eeg_fname, 'wb') as fid:
for ii, ch_num in enumerate(picks):
args = (str(ch_num + 1), raw.ch_names[ch_num],) + tuple(
'%0.5f' % x for x in 100 * pos[ii]) # convert to cm
fid.write(('\t'.join(args) + '\n').encode('ascii'))
pos_read_old = np.array([raw.info['chs'][p]['loc'][:3] for p in picks])
with warnings.catch_warnings(record=True) as w: # reclassified channel
raw = read_raw_ctf(ctf_eeg_fname) # read modified data
assert_true(all('MISC channel' in str(ww.message) for ww in w))
pos_read = np.array([raw.info['chs'][p]['loc'][:3] for p in picks])
assert_allclose(apply_trans(raw.info['ctf_head_t'], pos), pos_read,
rtol=1e-5, atol=1e-5)
assert_true((pos_read == pos_read_old).mean() < 0.1)
shutil.copy(op.join(ctf_dir, 'catch-alp-good-f.ds_randpos_raw.fif'),
op.join(temp_dir, 'randpos', 'catch-alp-good-f.ds_raw.fif'))
# Create a version with no hc, starting out *with* EEG pos (error)
os.mkdir(op.join(temp_dir, 'nohc'))
ctf_no_hc_fname = op.join(temp_dir, 'no_hc', ctf_fname_catch)
shutil.copytree(ctf_eeg_fname, ctf_no_hc_fname)
remove_base = op.join(ctf_no_hc_fname, op.basename(ctf_fname_catch[:-3]))
os.remove(remove_base + '.hc')
with warnings.catch_warnings(record=True): # no coord tr
assert_raises(RuntimeError, read_raw_ctf, ctf_no_hc_fname)
os.remove(remove_base + '.eeg')
shutil.copy(op.join(ctf_dir, 'catch-alp-good-f.ds_nohc_raw.fif'),
op.join(temp_dir, 'no_hc', 'catch-alp-good-f.ds_raw.fif'))
# All our files
use_fnames = [op.join(ctf_dir, c) for c in ctf_fnames]
for fname in use_fnames:
raw_c = Raw(fname + '_raw.fif', add_eeg_ref=False, preload=True)
with warnings.catch_warnings(record=True) as w: # reclassified ch
raw = read_raw_ctf(fname)
assert_true(all('MISC channel' in str(ww.message) for ww in w))
# check info match
assert_array_equal(raw.ch_names, raw_c.ch_names)
assert_allclose(raw.times, raw_c.times)
assert_allclose(raw._cals, raw_c._cals)
for key in ('version', 'usecs'):
assert_equal(raw.info['meas_id'][key], raw_c.info['meas_id'][key])
py_time = raw.info['meas_id']['secs']
c_time = raw_c.info['meas_id']['secs']
max_offset = 24 * 60 * 60 # probably overkill but covers timezone
assert_true(c_time - max_offset <= py_time <= c_time)
for t in ('dev_head_t', 'dev_ctf_t', 'ctf_head_t'):
assert_allclose(raw.info[t]['trans'], raw_c.info[t]['trans'],
rtol=1e-4, atol=1e-7)
for key in ('acq_pars', 'acq_stim', 'bads',
'ch_names', 'custom_ref_applied', 'description',
'events', 'experimenter', 'highpass', 'line_freq',
'lowpass', 'nchan', 'proj_id', 'proj_name',
'projs', 'sfreq', 'subject_info'):
assert_equal(raw.info[key], raw_c.info[key], key)
if op.basename(fname) not in single_trials:
# We don't force buffer size to be smaller like MNE-C
assert_equal(raw.info['buffer_size_sec'],
raw_c.info['buffer_size_sec'])
assert_equal(len(raw.info['comps']), len(raw_c.info['comps']))
for c1, c2 in zip(raw.info['comps'], raw_c.info['comps']):
for key in ('colcals', 'rowcals'):
assert_allclose(c1[key], c2[key])
assert_equal(c1['save_calibrated'], c2['save_calibrated'])
for key in ('row_names', 'col_names', 'nrow', 'ncol'):
assert_array_equal(c1['data'][key], c2['data'][key])
assert_allclose(c1['data']['data'], c2['data']['data'], atol=1e-7,
rtol=1e-5)
assert_allclose(raw.info['hpi_results'][0]['coord_trans']['trans'],
raw_c.info['hpi_results'][0]['coord_trans']['trans'],
rtol=1e-5, atol=1e-7)
assert_equal(len(raw.info['chs']), len(raw_c.info['chs']))
for ii, (c1, c2) in enumerate(zip(raw.info['chs'], raw_c.info['chs'])):
for key in ('kind', 'scanno', 'unit', 'ch_name', 'unit_mul',
'range', 'coord_frame', 'coil_type', 'logno'):
if c1['ch_name'] == 'RMSP' and \
'catch-alp-good-f' in fname and \
key in ('kind', 'unit', 'coord_frame', 'coil_type',
'logno'):
continue # XXX see below...
assert_equal(c1[key], c2[key], err_msg=key)
for key in ('cal',):
assert_allclose(c1[key], c2[key], atol=1e-6, rtol=1e-4,
err_msg='raw.info["chs"][%d][%s]' % (ii, key))
# XXX 2016/02/24: fixed bug with normal computation that used
# to exist, once mne-C tools are updated we should update our FIF
# conversion files, then the slices can go away (and the check
# can be combined with that for "cal")
for key in ('loc',):
if c1['ch_name'] == 'RMSP' and 'catch-alp-good-f' in fname:
continue
assert_allclose(c1[key][:3], c2[key][:3], atol=1e-6, rtol=1e-4,
err_msg='raw.info["chs"][%d][%s]' % (ii, key))
assert_allclose(c1[key][9:12], c2[key][9:12], atol=1e-6,
rtol=1e-4,
err_msg='raw.info["chs"][%d][%s]' % (ii, key))
if fname.endswith('catch-alp-good-f.ds'): # omit points from .pos file
raw.info['dig'] = raw.info['dig'][:-10]
assert_dig_allclose(raw.info, raw_c.info)
# check data match
raw_c.save(out_fname, overwrite=True, buffer_size_sec=1.)
raw_read = Raw(out_fname, add_eeg_ref=False)
# so let's check tricky cases based on sample boundaries
rng = np.random.RandomState(0)
pick_ch = rng.permutation(np.arange(len(raw.ch_names)))[:10]
bnd = int(round(raw.info['sfreq'] * raw.info['buffer_size_sec']))
assert_equal(bnd, raw._raw_extras[0]['block_size'])
assert_equal(bnd, block_sizes[op.basename(fname)])
slices = (slice(0, bnd), slice(bnd - 1, bnd), slice(3, bnd),
slice(3, 300), slice(None))
if len(raw.times) >= 2 * bnd: # at least two complete blocks
slices = slices + (slice(bnd, 2 * bnd), slice(bnd, bnd + 1),
slice(0, bnd + 100))
for sl_time in slices:
assert_allclose(raw[pick_ch, sl_time][0],
raw_c[pick_ch, sl_time][0])
assert_allclose(raw_read[pick_ch, sl_time][0],
raw_c[pick_ch, sl_time][0])
# all data / preload
with warnings.catch_warnings(record=True) as w: # reclassified ch
raw = read_raw_ctf(fname, preload=True)
assert_true(all('MISC channel' in str(ww.message) for ww in w))
assert_allclose(raw[:][0], raw_c[:][0])
raw.plot(show=False) # Test plotting with ref_meg channels.
assert_raises(ValueError, raw.plot, order='selection')
assert_raises(TypeError, read_raw_ctf, 1)
assert_raises(ValueError, read_raw_ctf, ctf_fname_continuous + 'foo.ds')
# test ignoring of system clock
read_raw_ctf(op.join(ctf_dir, ctf_fname_continuous), 'ignore')
assert_raises(ValueError, read_raw_ctf,
op.join(ctf_dir, ctf_fname_continuous), 'foo')
@spm_face.requires_spm_data
def test_read_spm_ctf():
"""Test CTF reader with omitted samples."""
data_path = spm_face.data_path()
raw_fname = op.join(data_path, 'MEG', 'spm',
'SPM_CTF_MEG_example_faces1_3D.ds')
raw = read_raw_ctf(raw_fname)
extras = raw._raw_extras[0]
assert_equal(extras['n_samp'], raw.n_times)
assert_false(extras['n_samp'] == extras['n_samp_tot'])
run_tests_if_main()
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