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import os.path as op
import os
from nose.tools import assert_true
import numpy as np
from numpy.testing import (assert_array_almost_equal, assert_array_equal,
assert_raises)
import warnings
from mne import (read_events, write_events, make_fixed_length_events,
find_events, find_stim_steps, io, pick_channels)
from mne.utils import _TempDir
from mne.event import define_target_events, merge_events
warnings.simplefilter('always')
base_dir = op.join(op.dirname(__file__), '..', 'io', 'tests', 'data')
fname = op.join(base_dir, 'test-eve.fif')
fname_gz = op.join(base_dir, 'test-eve.fif.gz')
fname_1 = op.join(base_dir, 'test-1-eve.fif')
fname_txt = op.join(base_dir, 'test-eve.eve')
fname_txt_1 = op.join(base_dir, 'test-eve-1.eve')
# using mne_process_raw --raw test_raw.fif --eventsout test-mpr-eve.eve:
fname_txt_mpr = op.join(base_dir, 'test-mpr-eve.eve')
fname_old_txt = op.join(base_dir, 'test-eve-old-style.eve')
raw_fname = op.join(base_dir, 'test_raw.fif')
tempdir = _TempDir()
def test_add_events():
"""Test adding events to a Raw file"""
# need preload
raw = io.Raw(raw_fname, preload=False)
events = np.array([[raw.first_samp, 0, 1]])
assert_raises(RuntimeError, raw.add_events, events, 'STI 014')
raw = io.Raw(raw_fname, preload=True)
orig_events = find_events(raw, 'STI 014')
# add some events
events = np.array([raw.first_samp, 0, 1])
assert_raises(ValueError, raw.add_events, events, 'STI 014') # bad shape
events[0] = raw.first_samp + raw.n_times + 1
events = events[np.newaxis, :]
assert_raises(ValueError, raw.add_events, events, 'STI 014') # bad time
events[0, 0] = raw.first_samp - 1
assert_raises(ValueError, raw.add_events, events, 'STI 014') # bad time
events[0, 0] = raw.first_samp + 1 # can't actually be first_samp
assert_raises(ValueError, raw.add_events, events, 'STI FOO')
raw.add_events(events, 'STI 014')
new_events = find_events(raw, 'STI 014')
assert_array_equal(new_events, np.concatenate((events, orig_events)))
def test_merge_events():
"""Test event merging
"""
events = read_events(fname) # Use as the gold standard
merges = [1, 2, 3, 4]
events_out = merge_events(events, merges, 1234)
events_out2 = events.copy()
for m in merges:
assert_true(not np.any(events_out[:, 2] == m))
events_out2[events[:, 2] == m, 2] = 1234
assert_array_equal(events_out, events_out2)
# test non-replacement functionality, should be sorted union of orig & new
events_out2 = merge_events(events, merges, 1234, False)
events_out = np.concatenate((events_out, events))
events_out = events_out[np.argsort(events_out[:, 0])]
assert_array_equal(events_out, events_out2)
def test_io_events():
"""Test IO for events
"""
# Test binary fif IO
events = read_events(fname) # Use as the gold standard
write_events(op.join(tempdir, 'events-eve.fif'), events)
events2 = read_events(op.join(tempdir, 'events-eve.fif'))
assert_array_almost_equal(events, events2)
# Test binary fif.gz IO
events2 = read_events(fname_gz) # Use as the gold standard
assert_array_almost_equal(events, events2)
write_events(op.join(tempdir, 'events-eve.fif.gz'), events2)
events2 = read_events(op.join(tempdir, 'events-eve.fif.gz'))
assert_array_almost_equal(events, events2)
# Test new format text file IO
write_events(op.join(tempdir, 'events.eve'), events)
events2 = read_events(op.join(tempdir, 'events.eve'))
assert_array_almost_equal(events, events2)
events2 = read_events(fname_txt_mpr)
assert_array_almost_equal(events, events2)
# Test old format text file IO
events2 = read_events(fname_old_txt)
assert_array_almost_equal(events, events2)
write_events(op.join(tempdir, 'events.eve'), events)
events2 = read_events(op.join(tempdir, 'events.eve'))
assert_array_almost_equal(events, events2)
# Test event selection
a = read_events(op.join(tempdir, 'events-eve.fif'), include=1)
b = read_events(op.join(tempdir, 'events-eve.fif'), include=[1])
c = read_events(op.join(tempdir, 'events-eve.fif'), exclude=[2, 3, 4, 5, 32])
d = read_events(op.join(tempdir, 'events-eve.fif'), include=1, exclude=[2, 3])
assert_array_equal(a, b)
assert_array_equal(a, c)
assert_array_equal(a, d)
# Test binary file IO for 1 event
events = read_events(fname_1) # Use as the new gold standard
write_events(op.join(tempdir, 'events-eve.fif'), events)
events2 = read_events(op.join(tempdir, 'events-eve.fif'))
assert_array_almost_equal(events, events2)
# Test text file IO for 1 event
write_events(op.join(tempdir, 'events.eve'), events)
events2 = read_events(op.join(tempdir, 'events.eve'))
assert_array_almost_equal(events, events2)
# test warnings on bad filenames
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter('always')
fname2 = op.join(tempdir, 'test-bad-name.fif')
write_events(fname2, events)
read_events(fname2)
assert_true(len(w) == 2)
def test_find_events():
"""Test find events in raw file
"""
events = read_events(fname)
raw = io.Raw(raw_fname, preload=True)
# let's test the defaulting behavior while we're at it
extra_ends = ['', '_1']
orig_envs = [os.getenv('MNE_STIM_CHANNEL%s' % s) for s in extra_ends]
os.environ['MNE_STIM_CHANNEL'] = 'STI 014'
if 'MNE_STIM_CHANNEL_1' in os.environ:
del os.environ['MNE_STIM_CHANNEL_1']
events2 = find_events(raw)
assert_array_almost_equal(events, events2)
# Reset some data for ease of comparison
raw.first_samp = 0
raw.info['sfreq'] = 1000
stim_channel = 'STI 014'
stim_channel_idx = pick_channels(raw.info['ch_names'],
include=stim_channel)
# test empty events channel
raw._data[stim_channel_idx, :] = 0
assert_array_equal(find_events(raw), np.empty((0, 3), dtype='int32'))
raw._data[stim_channel_idx, :4] = 1
assert_array_equal(find_events(raw), np.empty((0, 3), dtype='int32'))
raw._data[stim_channel_idx, -1:] = 9
assert_array_equal(find_events(raw), [[14399, 0, 9]])
# Test that we can handle consecutive events with no gap
raw._data[stim_channel_idx, 10:20] = 5
raw._data[stim_channel_idx, 20:30] = 6
raw._data[stim_channel_idx, 30:32] = 5
raw._data[stim_channel_idx, 40] = 6
assert_array_equal(find_events(raw, consecutive=False),
[[10, 0, 5],
[40, 0, 6],
[14399, 0, 9]])
assert_array_equal(find_events(raw, consecutive=True),
[[10, 0, 5],
[20, 5, 6],
[30, 6, 5],
[40, 0, 6],
[14399, 0, 9]])
assert_array_equal(find_events(raw),
[[10, 0, 5],
[20, 5, 6],
[40, 0, 6],
[14399, 0, 9]])
assert_array_equal(find_events(raw, output='offset', consecutive=False),
[[31, 0, 5],
[40, 0, 6],
[14399, 0, 9]])
assert_array_equal(find_events(raw, output='offset', consecutive=True),
[[19, 6, 5],
[29, 5, 6],
[31, 0, 5],
[40, 0, 6],
[14399, 0, 9]])
assert_raises(ValueError,find_events,raw, output='step', consecutive=True)
assert_array_equal(find_events(raw, output='step', consecutive=True,
shortest_event=1),
[[10, 0, 5],
[20, 5, 6],
[30, 6, 5],
[32, 5, 0],
[40, 0, 6],
[41, 6, 0],
[14399, 0, 9],
[14400, 9, 0]])
assert_array_equal(find_events(raw, output='offset'),
[[19, 6, 5],
[31, 0, 6],
[40, 0, 6],
[14399, 0, 9]])
assert_array_equal(find_events(raw, consecutive=False, min_duration=0.002),
[[10, 0, 5]])
assert_array_equal(find_events(raw, consecutive=True, min_duration=0.002),
[[10, 0, 5],
[20, 5, 6],
[30, 6, 5]])
assert_array_equal(find_events(raw, output='offset', consecutive=False,
min_duration=0.002),
[[31, 0, 5]])
assert_array_equal(find_events(raw, output='offset', consecutive=True,
min_duration=0.002),
[[19, 6, 5],
[29, 5, 6],
[31, 0, 5]])
assert_array_equal(find_events(raw, consecutive=True, min_duration=0.003),
[[10, 0, 5],
[20, 5, 6]])
# test find_stim_steps merge parameter
raw._data[stim_channel_idx, :] = 0
raw._data[stim_channel_idx, 0] = 1
raw._data[stim_channel_idx, 10] = 4
raw._data[stim_channel_idx, 11:20] = 5
assert_array_equal(find_stim_steps(raw, pad_start=0, merge=0,
stim_channel=stim_channel),
[[0, 0, 1],
[1, 1, 0],
[10, 0, 4],
[11, 4, 5],
[20, 5, 0]])
assert_array_equal(find_stim_steps(raw, merge=-1,
stim_channel=stim_channel),
[[1, 1, 0],
[10, 0, 5],
[20, 5, 0]])
assert_array_equal(find_stim_steps(raw, merge=1,
stim_channel=stim_channel),
[[1, 1, 0],
[11, 0, 5],
[20, 5, 0]])
# put back the env vars we trampled on
for s, o in zip(extra_ends, orig_envs):
if o is not None:
os.environ['MNE_STIM_CHANNEL%s' % s] = o
def test_make_fixed_length_events():
"""Test making events of a fixed length
"""
raw = io.Raw(raw_fname)
events = make_fixed_length_events(raw, id=1)
assert_true(events.shape[1], 3)
def test_define_events():
"""Test defining response events
"""
events = read_events(fname)
raw = io.Raw(raw_fname)
events_, _ = define_target_events(events, 5, 32, raw.info['sfreq'],
.2, 0.7, 42, 99)
n_target = events[events[:, 2] == 5].shape[0]
n_miss = events_[events_[:, 2] == 99].shape[0]
n_target_ = events_[events_[:, 2] == 42].shape[0]
assert_true(n_target_ == (n_target - n_miss))
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