def copyfile_kit(src, dest, subject_id, session_id,
task, run, _init_kwargs):
"""Copy and rename KIT files to a new location.
Parameters
----------
src : str
Path to the source raw .con or .sqd folder.
dest : str
Path to the destination of the new bids folder.
subject_id : str | None
The subject ID. Corresponds to "sub".
session_id : str | None
The session identifier. Corresponds to "ses".
task : str | None
The task identifier. Corresponds to "task".
run : int | None
The run number. Corresponds to "run".
_init_kwargs : dict
Extract information of marker and headpoints
"""
# create parent directories in case it does not exist yet
_mkdir_p(op.dirname(dest))
# KIT data requires the marker file to be copied over too
sh.copyfile(src, dest)
data_path = op.split(dest)[0]
datatype = 'meg'
if 'mrk' in _init_kwargs:
hpi = _init_kwargs['mrk']
acq_map = dict()
if isinstance(hpi, list):
if _get_mrk_meas_date(hpi[0]) > _get_mrk_meas_date(hpi[1]):
raise ValueError('Markers provided in incorrect order.')
_, marker_ext = _parse_ext(hpi[0])
acq_map = dict(zip(['pre', 'post'], hpi))
else:
_, marker_ext = _parse_ext(hpi)
acq_map[None] = hpi
for key, value in acq_map.items():
marker_path = BIDSPath(
subject=subject_id, session=session_id, task=task, run=run,
acquisition=key, suffix='markers', extension=marker_ext,
datatype=datatype)
sh.copyfile(value, op.join(data_path, marker_path.basename))
for acq in ['elp', 'hsp']:
if acq in _init_kwargs:
position_file = _init_kwargs[acq]
task, run, acq = None, None, acq.upper()
position_ext = '.pos'
position_path = BIDSPath(
subject=subject_id, session=session_id, task=task, run=run,
acquisition=acq, suffix='headshape', extension=position_ext,
datatype=datatype)
sh.copyfile(position_file,
op.join(data_path, position_path.basename))
def _write_dig_bids(bids_path, raw, overwrite=False, verbose=True):
"""Write BIDS formatted DigMontage from Raw instance.
Handles coordinatesystem.json and electrodes.tsv writing
from DigMontage.
Parameters
----------
bids_path : BIDSPath
Path in the BIDS dataset to save the ``electrodes.tsv``
and ``coordsystem.json`` file for. ``datatype``
attribute must be ``eeg``, or ``ieeg``. For ``meg``
data, ``electrodes.tsv`` are not saved.
raw : instance of Raw
The data as MNE-Python Raw object.
overwrite : bool
Whether to overwrite the existing file.
Defaults to False.
verbose : bool
Set verbose output to true or false.
"""
# write electrodes data for iEEG and EEG
unit = "m" # defaults to meters
# get coordinate frame from digMontage
digpoint = raw.info['dig'][0]
if any(digpoint['coord_frame'] != _digpoint['coord_frame']
for _digpoint in raw.info['dig']):
warn("Not all digpoints have the same coordinate frame. "
"Skipping electrodes.tsv writing...")
return
# get the accepted mne-python coordinate frames
coord_frame_int = int(digpoint['coord_frame'])
mne_coord_frame = MNE_FRAME_TO_STR.get(coord_frame_int, None)
coord_frame = MNE_TO_BIDS_FRAMES.get(mne_coord_frame, None)
# create electrodes/coordsystem files using a subset of entities
# that are specified for these files in the specification
coord_file_entities = {
'root': bids_path.root,
'datatype': bids_path.datatype,
'subject': bids_path.subject,
'session': bids_path.session,
'acquisition': bids_path.acquisition,
'space': bids_path.space
}
datatype = bids_path.datatype
electrodes_path = BIDSPath(**coord_file_entities, suffix='electrodes',
extension='.tsv')
coordsystem_path = BIDSPath(**coord_file_entities, suffix='coordsystem',
extension='.json')
if verbose:
print("Writing electrodes file to... ", electrodes_path)
print("Writing coordsytem file to... ", coordsystem_path)
if datatype == "ieeg":
if coord_frame is not None:
# XXX: To improve when mne-python allows coord_frame='unknown'
if coord_frame not in BIDS_IEEG_COORDINATE_FRAMES:
coordsystem_path.update(space=coord_frame)
electrodes_path.update(space=coord_frame)
coord_frame = 'Other'
# Now write the data to the elec coords and the coordsystem
_electrodes_tsv(raw, electrodes_path,
datatype, overwrite, verbose)
_coordsystem_json(raw=raw, unit=unit, hpi_coord_system='n/a',
sensor_coord_system=coord_frame,
fname=coordsystem_path, datatype=datatype,
overwrite=overwrite, verbose=verbose)
else:
# default coordinate frame to mri if not available
warn("Coordinate frame of iEEG coords missing/unknown "
"for {}. Skipping reading "
"in of montage...".format(electrodes_path))
elif datatype == 'eeg':
# We only write EEG electrodes.tsv and coordsystem.json
# if we have LPA, RPA, and NAS available to rescale to a known
# coordinate system frame
coords = _extract_landmarks(raw.info['dig'])
landmarks = set(['RPA', 'NAS', 'LPA']) == set(list(coords.keys()))
# XXX: to be improved to allow rescaling if landmarks are present
# mne-python automatically converts unknown coord frame to head
if coord_frame_int == FIFF.FIFFV_COORD_HEAD and landmarks:
# Now write the data
_electrodes_tsv(raw, electrodes_path, datatype,
overwrite, verbose)
_coordsystem_json(raw=raw, unit='m', hpi_coord_system='n/a',
sensor_coord_system='CapTrak',
fname=coordsystem_path, datatype=datatype,
overwrite=overwrite, verbose=verbose)
else:
warn("Skipping EEG electrodes.tsv... "
"Setting montage not possible if anatomical "
"landmarks (NAS, LPA, RPA) are missing, "
"and coord_frame is not 'head'.")
def read_raw_bids(bids_path, extra_params=None, verbose=True):
"""Read BIDS compatible data.
Will attempt to read associated events.tsv and channels.tsv files to
populate the returned raw object with raw.annotations and raw.info['bads'].
Parameters
----------
bids_path : mne_bids.BIDSPath
The file to read. The :class:`mne_bids.BIDSPath` instance passed here
**must** have the ``.root`` attribute set. The ``.datatype`` attribute
**may** be set. If ``.datatype`` is not set and only one data type
(e.g., only EEG or MEG data) is present in the dataset, it will be
selected automatically.
extra_params : None | dict
Extra parameters to be passed to MNE read_raw_* functions.
If a dict, for example: ``extra_params=dict(allow_maxshield=True)``.
Note that the ``exclude`` parameter, which is supported by some
MNE-Python readers, is not supported; instead, you need to subset
your channels **after** reading.
verbose : bool
The verbosity level.
Returns
-------
raw : mne.io.Raw
The data as MNE-Python Raw object.
Raises
------
RuntimeError
If multiple recording data types are present in the dataset, but
``datatype=None``.
RuntimeError
If more than one data files exist for the specified recording.
RuntimeError
If no data file in a supported format can be located.
ValueError
If the specified ``datatype`` cannot be found in the dataset.
"""
if not isinstance(bids_path, BIDSPath):
raise RuntimeError('"bids_path" must be a BIDSPath object. Please '
'instantiate using mne_bids.BIDSPath().')
bids_path = bids_path.copy()
sub = bids_path.subject
ses = bids_path.session
bids_root = bids_path.root
datatype = bids_path.datatype
suffix = bids_path.suffix
# check root available
if bids_root is None:
raise ValueError('The root of the "bids_path" must be set. '
'Please use `bids_path.update(root="<root>")` '
'to set the root of the BIDS folder to read.')
# infer the datatype and suffix if they are not present in the BIDSPath
if datatype is None:
datatype = _infer_datatype(root=bids_root, sub=sub, ses=ses)
bids_path.update(datatype=datatype)
if suffix is None:
bids_path.update(suffix=datatype)
data_dir = bids_path.directory
bids_fname = bids_path.fpath.name
if op.splitext(bids_fname)[1] == '.pdf':
bids_raw_folder = op.join(data_dir, f'{bids_path.basename}')
bids_fpath = glob.glob(op.join(bids_raw_folder, 'c,rf*'))[0]
config = op.join(bids_raw_folder, 'config')
else:
bids_fpath = op.join(data_dir, bids_fname)
config = None
if extra_params is None:
extra_params = dict()
elif 'exclude' in extra_params:
del extra_params['exclude']
logger.info('"exclude" parameter is not supported by read_raw_bids')
raw = _read_raw(bids_fpath,
electrode=None,
hsp=None,
hpi=None,
config=config,
verbose=None,
**extra_params)
# Try to find an associated events.tsv to get information about the
# events in the recorded data
events_fname = _find_matching_sidecar(bids_path,
suffix='events',
extension='.tsv',
on_error='warn')
if events_fname is not None:
raw = _handle_events_reading(events_fname, raw)
# Try to find an associated channels.tsv to get information about the
# status and type of present channels
channels_fname = _find_matching_sidecar(bids_path,
suffix='channels',
extension='.tsv',
on_error='warn')
if channels_fname is not None:
raw = _handle_channels_reading(channels_fname, raw)
# Try to find an associated electrodes.tsv and coordsystem.json
# to get information about the status and type of present channels
on_error = 'warn' if suffix == 'ieeg' else 'ignore'
electrodes_fname = _find_matching_sidecar(bids_path,
suffix='electrodes',
extension='.tsv',
on_error=on_error)
coordsystem_fname = _find_matching_sidecar(bids_path,
suffix='coordsystem',
extension='.json',
on_error=on_error)
if electrodes_fname is not None:
if coordsystem_fname is None:
raise RuntimeError(f"BIDS mandates that the coordsystem.json "
f"should exist if electrodes.tsv does. "
f"Please create coordsystem.json for"
f"{bids_path.basename}")
if datatype in ['meg', 'eeg', 'ieeg']:
raw = _read_dig_bids(electrodes_fname, coordsystem_fname, raw,
datatype, verbose)
# Try to find an associated sidecar .json to get information about the
# recording snapshot
sidecar_fname = _find_matching_sidecar(bids_path,
suffix=datatype,
extension='.json',
on_error='warn')
if sidecar_fname is not None:
raw = _handle_info_reading(sidecar_fname, raw, verbose=verbose)
# read in associated scans filename
scans_fname = BIDSPath(subject=bids_path.subject,
session=bids_path.session,
suffix='scans',
extension='.tsv',
root=bids_path.root).fpath
if scans_fname.exists():
raw = _handle_scans_reading(scans_fname,
raw,
bids_path,
verbose=verbose)
# read in associated subject info from participants.tsv
participants_tsv_fpath = op.join(bids_root, 'participants.tsv')
subject = f"sub-{bids_path.subject}"
if op.exists(participants_tsv_fpath):
raw = _handle_participants_reading(participants_tsv_fpath,
raw,
subject,
verbose=verbose)
else:
warn("Participants file not found for {}... Not reading "
"in any particpants.tsv data.".format(bids_fname))
return raw
def _summarize_channels_tsv(root, scans_fpaths, verbose=True):
"""Summarize channels.tsv data in BIDS root directory.
Currently, summarizes all REQUIRED components of channels
data, and some RECOMMENDED and OPTIONAL components.
Parameters
----------
root : str | pathlib.Path
The path of the root of the BIDS compatible folder.
scans_fpaths : list
A list of all *_scans.tsv files in ``root``. The summary
will occur for all scans listed in the *_scans.tsv files.
verbose : bool
Returns
-------
template_dict : dict
A dictionary of values for various template strings.
"""
root = Path(root)
# keep track of channel type, status
ch_status_count = {'bad': [], 'good': []}
ch_count = []
# loop through each scan
for scan_fpath in scans_fpaths:
# load in the scans.tsv file
# and read metadata for each scan
scans_tsv = _from_tsv(scan_fpath)
scans = scans_tsv['filename']
for scan in scans:
# summarize metadata of recordings
bids_path, _ = _parse_ext(scan)
datatype = op.dirname(scan)
if datatype not in ['meg', 'eeg', 'ieeg']:
continue
# convert to BIDS Path
params = get_entities_from_fname(bids_path)
bids_path = BIDSPath(root=root, **params)
# XXX: improve to allow emptyroom
if bids_path.subject == 'emptyroom':
continue
channels_fname = _find_matching_sidecar(bids_path=bids_path,
suffix='channels',
extension='.tsv')
# summarize channels.tsv
channels_tsv = _from_tsv(channels_fname)
for status in ch_status_count.keys():
ch_status = [
ch for ch in channels_tsv['status'] if ch == status
]
ch_status_count[status].append(len(ch_status))
ch_count.append(len(channels_tsv['name']))
# create summary template strings for status
template_dict = {
'mean_chs': np.mean(ch_count),
'std_chs': np.std(ch_count),
'mean_good_chs': np.mean(ch_status_count['good']),
'std_good_chs': np.std(ch_status_count['good']),
'mean_bad_chs': np.mean(ch_status_count['bad']),
'std_bad_chs': np.std(ch_status_count['bad']),
}
for key, val in template_dict.items():
template_dict[key] = round(val, 2)
return template_dict
def _summarize_sidecar_json(root, scans_fpaths, verbose=True):
"""Summarize scans in BIDS root directory.
Parameters
----------
root : str | pathlib.Path
The path of the root of the BIDS compatible folder.
scans_fpaths : list
A list of all *_scans.tsv files in ``root``. The summary
will occur for all scans listed in the *_scans.tsv files.
verbose : bool
Set verbose output to true or false.
Returns
-------
template_dict : dict
A dictionary of values for various template strings.
"""
n_scans = 0
powerlinefreqs, sfreqs = set(), set()
manufacturers = set()
length_recordings = []
# loop through each scan
for scan_fpath in scans_fpaths:
# load in the scans.tsv file
# and read metadata for each scan
scans_tsv = _from_tsv(scan_fpath)
scans = scans_tsv['filename']
for scan in scans:
# summarize metadata of recordings
bids_path, ext = _parse_ext(scan)
datatype = op.dirname(scan)
if datatype not in ALLOWED_DATATYPES:
continue
n_scans += 1
# convert to BIDS Path
params = get_entities_from_fname(bids_path)
bids_path = BIDSPath(root=root, **params)
# XXX: improve to allow emptyroom
if bids_path.subject == 'emptyroom':
continue
sidecar_fname = _find_matching_sidecar(bids_path=bids_path,
suffix=datatype,
extension='.json')
with open(sidecar_fname, 'r', encoding='utf-8-sig') as fin:
sidecar_json = json.load(fin)
# aggregate metadata from each scan
# REQUIRED kwargs
sfreq = sidecar_json['SamplingFrequency']
powerlinefreq = str(sidecar_json['PowerLineFrequency'])
software_filters = sidecar_json.get('SoftwareFilters')
if not software_filters:
software_filters = 'n/a'
# RECOMMENDED kwargs
manufacturer = sidecar_json.get('Manufacturer', 'n/a')
record_duration = sidecar_json.get('RecordingDuration', 'n/a')
sfreqs.add(str(np.round(sfreq, 2)))
powerlinefreqs.add(str(powerlinefreq))
if manufacturer != 'n/a':
manufacturers.add(manufacturer)
length_recordings.append(record_duration)
# XXX: length summary is only allowed, if no 'n/a' was found
if any([dur == 'n/a' for dur in length_recordings]):
length_recordings = None
template_dict = {
'n_scans': n_scans,
'manufacturer': list(manufacturers),
'sfreq': sfreqs,
'powerlinefreq': powerlinefreqs,
'software_filters': software_filters,
'length_recordings': length_recordings,
}
return template_dict
def convert_dataset_to_bids(root,
bids_identifiers,
montage="standard_1020",
ext=".edf"):
"""
Convert a sample dataset to bids format.
You will need to modify this function depending on your sourcedata structure.
This current formula assumes the source data files are named as follows:
<sub>_<run>.edf
Parameters
----------
root: Path
Absolute path to the bids root directory
bids_identifiers: dict
Dictionary of bids identifiers you want to apply to your dataset globally
montage: str
The name of the montage to apply
ext: str
The extension of the files in the sourcedata directory
Returns
-------
"""
source_dir = root / "sourcedata"
# Find all the potential files in the sourcedata directory
source_fpaths = [
fpath for fpath in source_dir.glob(f"*{ext}") if fpath.is_file()
]
# Grab the global bids identifiers
session = bids_identifiers.get("session")
task = bids_identifiers.get("task")
acquisition = bids_identifiers.get("acquisition")
datatype = bids_identifiers.get("datatype")
for ind, fpath in enumerate(source_fpaths):
# Assumes sourcedata filename structure as <subject>_<run><ext>
subject, run = fpath.name.split("_")
run = run.replace(ext, "")
# Set up the bids path for this individual source file
bids_path = BIDSPath(
root=root,
subject=subject,
session=session,
acquisition=acquisition,
task=task,
run=run,
datatype=datatype,
)
# Convert the file to bids
bids_path = write_epitrack_bids(source_path=fpath,
bids_path=bids_path,
overwrite=True,
montage=montage,
verbose=False)
# It is often useful to be able to backtrack the bids file to the sourcefile.
# This will add an additional column in the scans.tsv file to allow this
# back-tracking
append_original_fname_to_scans(
Path(fpath).name, root, bids_path.basename)
def _write_dig_bids(bids_path,
raw,
montage=None,
acpc_aligned=False,
overwrite=False):
"""Write BIDS formatted DigMontage from Raw instance.
Handles coordsystem.json and electrodes.tsv writing
from DigMontage.
Parameters
----------
bids_path : BIDSPath
Path in the BIDS dataset to save the ``electrodes.tsv``
and ``coordsystem.json`` file for. ``datatype``
attribute must be ``eeg``, or ``ieeg``. For ``meg``
data, ``electrodes.tsv`` are not saved.
raw : mne.io.Raw
The data as MNE-Python Raw object.
montage : mne.channels.DigMontage | None
The montage to use rather than the one in ``raw`` if it
must be transformed from the "head" coordinate frame.
acpc_aligned : bool
Whether "mri" space is aligned to ACPC.
overwrite : bool
Whether to overwrite the existing file.
Defaults to False.
"""
# write electrodes data for iEEG and EEG
unit = "m" # defaults to meters
if montage is None:
montage = raw.get_montage()
else: # assign montage to raw but supress any coordinate transforms
montage = montage.copy() # don't modify original
montage_coord_frame = montage.get_positions()['coord_frame']
fids = [
d for d in montage.dig # save to add back
if d['kind'] == FIFF.FIFFV_POINT_CARDINAL
]
montage.remove_fiducials() # prevent coordinate transform
with warnings.catch_warnings():
warnings.filterwarnings(action='ignore',
category=RuntimeWarning,
message='.*nasion not found',
module='mne')
raw.set_montage(montage)
for ch in raw.info['chs']:
ch['coord_frame'] = MNE_STR_TO_FRAME[montage_coord_frame]
for d in raw.info['dig']:
d['coord_frame'] = MNE_STR_TO_FRAME[montage_coord_frame]
with raw.info._unlock(): # add back fiducials
raw.info['dig'] = fids + raw.info['dig']
# get the accepted mne-python coordinate frames
coord_frame_int = int(montage.dig[0]['coord_frame'])
mne_coord_frame = MNE_FRAME_TO_STR.get(coord_frame_int, None)
coord_frame = MNE_TO_BIDS_FRAMES.get(mne_coord_frame, None)
if coord_frame == 'CapTrak' and bids_path.datatype in ('eeg', 'nirs'):
pos = raw.get_montage().get_positions()
if any([pos[fid_key] is None for fid_key in ('nasion', 'lpa', 'rpa')]):
raise RuntimeError("'head' coordinate frame must contain nasion "
"and left and right pre-auricular point "
"landmarks")
if bids_path.datatype == 'ieeg' and bids_path.space in (None, 'ACPC') and \
mne_coord_frame == 'ras':
if not acpc_aligned:
raise RuntimeError(
'`acpc_aligned` is False, if your T1 is not aligned '
'to ACPC and the coordinates are in fact in ACPC '
'space there will be no way to relate the coordinates '
'to the T1. If the T1 is ACPC-aligned, use '
'`acpc_aligned=True`')
coord_frame = 'ACPC'
if bids_path.space is None: # no space, use MNE coord frame
if coord_frame is None: # if no MNE coord frame, skip
warn("Coordinate frame could not be inferred from the raw object "
"and the BIDSPath.space was none, skipping the writing of "
"channel positions")
return
else: # either a space and an MNE coord frame or just a space
if coord_frame is None: # just a space, use that
coord_frame = bids_path.space
else: # space and raw have coordinate frame, check match
if bids_path.space != coord_frame and not (
coord_frame == 'fsaverage'
and bids_path.space == 'MNI305'): # fsaverage == MNI305
raise ValueError('Coordinates in the raw object or montage '
f'are in the {coord_frame} coordinate '
'frame but BIDSPath.space is '
f'{bids_path.space}')
# create electrodes/coordsystem files using a subset of entities
# that are specified for these files in the specification
coord_file_entities = {
'root': bids_path.root,
'datatype': bids_path.datatype,
'subject': bids_path.subject,
'session': bids_path.session,
'acquisition': bids_path.acquisition,
'space': None if bids_path.datatype == 'nirs' else coord_frame
}
channels_suffix = \
'optodes' if bids_path.datatype == 'nirs' else 'electrodes'
_channels_fun = _write_optodes_tsv if bids_path.datatype == 'nirs' else \
_write_electrodes_tsv
channels_path = BIDSPath(**coord_file_entities,
suffix=channels_suffix,
extension='.tsv')
coordsystem_path = BIDSPath(**coord_file_entities,
suffix='coordsystem',
extension='.json')
# Now write the data to the elec coords and the coordsystem
_channels_fun(raw, channels_path, bids_path.datatype, overwrite)
_write_coordsystem_json(raw=raw,
unit=unit,
hpi_coord_system='n/a',
sensor_coord_system=coord_frame,
fname=coordsystem_path,
datatype=bids_path.datatype,
overwrite=overwrite)
def _write_dig_bids(bids_path,
raw,
montage=None,
acpc_aligned=False,
overwrite=False):
"""Write BIDS formatted DigMontage from Raw instance.
Handles coordinatesystem.json and electrodes.tsv writing
from DigMontage.
Parameters
----------
bids_path : mne_bids.BIDSPath
Path in the BIDS dataset to save the ``electrodes.tsv``
and ``coordsystem.json`` file for. ``datatype``
attribute must be ``eeg``, or ``ieeg``. For ``meg``
data, ``electrodes.tsv`` are not saved.
raw : mne.io.Raw
The data as MNE-Python Raw object.
montage : mne.channels.DigMontage | None
The montage to use rather than the one in ``raw`` if it
must be transformed from the "head" coordinate frame.
acpc_aligned : bool
Whether "mri" space is aligned to ACPC.
overwrite : bool
Whether to overwrite the existing file.
Defaults to False.
"""
# write electrodes data for iEEG and EEG
unit = "m" # defaults to meters
if montage is None:
montage = raw.get_montage()
else:
# prevent transformation back to "head", only should be used
# in this specific circumstance
if bids_path.datatype == 'ieeg':
montage.remove_fiducials()
raw.set_montage(montage)
# get coordinate frame from digMontage
digpoint = montage.dig[0]
if any(digpoint['coord_frame'] != _digpoint['coord_frame']
for _digpoint in montage.dig):
warn("Not all digpoints have the same coordinate frame. "
"Skipping electrodes.tsv writing...")
return
# get the accepted mne-python coordinate frames
coord_frame_int = int(digpoint['coord_frame'])
mne_coord_frame = MNE_FRAME_TO_STR.get(coord_frame_int, None)
coord_frame = MNE_TO_BIDS_FRAMES.get(mne_coord_frame, None)
if bids_path.datatype == 'ieeg' and mne_coord_frame == 'mri':
if acpc_aligned:
coord_frame = 'ACPC'
else:
raise RuntimeError(
'`acpc_aligned` is False, if your T1 is not aligned '
'to ACPC and the coordinates are in fact in ACPC '
'space there will be no way to relate the coordinates '
'to the T1. If the T1 is ACPC-aligned, use '
'`acpc_aligned=True`')
# create electrodes/coordsystem files using a subset of entities
# that are specified for these files in the specification
coord_file_entities = {
'root': bids_path.root,
'datatype': bids_path.datatype,
'subject': bids_path.subject,
'session': bids_path.session,
'acquisition': bids_path.acquisition,
'space': bids_path.space
}
datatype = bids_path.datatype
electrodes_path = BIDSPath(**coord_file_entities,
suffix='electrodes',
extension='.tsv')
coordsystem_path = BIDSPath(**coord_file_entities,
suffix='coordsystem',
extension='.json')
logger.info(f'Writing electrodes file to... {electrodes_path}')
logger.info(f'Writing coordsytem file to... {coordsystem_path}')
if datatype == 'ieeg':
if coord_frame is not None:
# XXX: To improve when mne-python allows coord_frame='unknown'
# coordinate frame is either
coordsystem_path.update(space=coord_frame)
electrodes_path.update(space=coord_frame)
# Now write the data to the elec coords and the coordsystem
_write_electrodes_tsv(raw, electrodes_path, datatype, overwrite)
_write_coordsystem_json(raw=raw,
unit=unit,
hpi_coord_system='n/a',
sensor_coord_system=(coord_frame,
mne_coord_frame),
fname=coordsystem_path,
datatype=datatype,
overwrite=overwrite)
else:
# default coordinate frame to mri if not available
warn("Coordinate frame of iEEG coords missing/unknown "
"for {}. Skipping reading "
"in of montage...".format(electrodes_path))
elif datatype == 'eeg':
# We only write EEG electrodes.tsv and coordsystem.json
# if we have LPA, RPA, and NAS available to rescale to a known
# coordinate system frame
coords = _extract_landmarks(raw.info['dig'])
landmarks = set(['RPA', 'NAS', 'LPA']) == set(list(coords.keys()))
# XXX: to be improved to allow rescaling if landmarks are present
# mne-python automatically converts unknown coord frame to head
if coord_frame_int == FIFF.FIFFV_COORD_HEAD and landmarks:
# Now write the data
_write_electrodes_tsv(raw, electrodes_path, datatype, overwrite)
_write_coordsystem_json(raw=raw,
unit='m',
hpi_coord_system='n/a',
sensor_coord_system='CapTrak',
fname=coordsystem_path,
datatype=datatype,
overwrite=overwrite)
else:
warn("Skipping EEG electrodes.tsv... "
"Setting montage not possible if anatomical "
"landmarks (NAS, LPA, RPA) are missing, "
"and coord_frame is not 'head'.")
def read_raw_bids(bids_path, extra_params=None, verbose=None):
"""Read BIDS compatible data.
Will attempt to read associated events.tsv and channels.tsv files to
populate the returned raw object with raw.annotations and raw.info['bads'].
Parameters
----------
bids_path : BIDSPath
The file to read. The :class:`mne_bids.BIDSPath` instance passed here
**must** have the ``.root`` attribute set. The ``.datatype`` attribute
**may** be set. If ``.datatype`` is not set and only one data type
(e.g., only EEG or MEG data) is present in the dataset, it will be
selected automatically.
.. note::
If ``bids_path`` points to a symbolic link of a ``.fif`` file
without a ``split`` entity, the link will be resolved before
reading.
extra_params : None | dict
Extra parameters to be passed to MNE read_raw_* functions.
Note that the ``exclude`` parameter, which is supported by some
MNE-Python readers, is not supported; instead, you need to subset
your channels **after** reading.
%(verbose)s
Returns
-------
raw : mne.io.Raw
The data as MNE-Python Raw object.
Raises
------
RuntimeError
If multiple recording data types are present in the dataset, but
``datatype=None``.
RuntimeError
If more than one data files exist for the specified recording.
RuntimeError
If no data file in a supported format can be located.
ValueError
If the specified ``datatype`` cannot be found in the dataset.
"""
if not isinstance(bids_path, BIDSPath):
raise RuntimeError('"bids_path" must be a BIDSPath object. Please '
'instantiate using mne_bids.BIDSPath().')
bids_path = bids_path.copy()
sub = bids_path.subject
ses = bids_path.session
bids_root = bids_path.root
datatype = bids_path.datatype
suffix = bids_path.suffix
# check root available
if bids_root is None:
raise ValueError('The root of the "bids_path" must be set. '
'Please use `bids_path.update(root="<root>")` '
'to set the root of the BIDS folder to read.')
# infer the datatype and suffix if they are not present in the BIDSPath
if datatype is None:
datatype = _infer_datatype(root=bids_root, sub=sub, ses=ses)
bids_path.update(datatype=datatype)
if suffix is None:
bids_path.update(suffix=datatype)
if bids_path.fpath.suffix == '.pdf':
bids_raw_folder = bids_path.directory / f'{bids_path.basename}'
raw_path = list(bids_raw_folder.glob('c,rf*'))[0]
config_path = bids_raw_folder / 'config'
else:
raw_path = bids_path.fpath
# Resolve for FIFF files
if (raw_path.suffix == '.fif' and bids_path.split is None
and raw_path.is_symlink()):
target_path = raw_path.resolve()
logger.info(f'Resolving symbolic link: '
f'{raw_path} -> {target_path}')
raw_path = target_path
config_path = None
# Special-handle EDF filenames: we accept upper- and lower-case extensions
if raw_path.suffix.lower() == '.edf':
for extension in ('.edf', '.EDF'):
candidate_path = raw_path.with_suffix(extension)
if candidate_path.exists():
raw_path = candidate_path
break
if not raw_path.exists():
raise FileNotFoundError(f'File does not exist: {raw_path}')
if config_path is not None and not config_path.exists():
raise FileNotFoundError(f'config directory not found: {config_path}')
if extra_params is None:
extra_params = dict()
elif 'exclude' in extra_params:
del extra_params['exclude']
logger.info('"exclude" parameter is not supported by read_raw_bids')
if raw_path.suffix == '.fif' and 'allow_maxshield' not in extra_params:
extra_params['allow_maxshield'] = True
raw = _read_raw(raw_path,
electrode=None,
hsp=None,
hpi=None,
config_path=config_path,
**extra_params)
# Try to find an associated events.tsv to get information about the
# events in the recorded data
events_fname = _find_matching_sidecar(bids_path,
suffix='events',
extension='.tsv',
on_error='warn')
if events_fname is not None:
raw = _handle_events_reading(events_fname, raw)
# Try to find an associated channels.tsv to get information about the
# status and type of present channels
channels_fname = _find_matching_sidecar(bids_path,
suffix='channels',
extension='.tsv',
on_error='warn')
if channels_fname is not None:
raw = _handle_channels_reading(channels_fname, raw)
# Try to find an associated electrodes.tsv and coordsystem.json
# to get information about the status and type of present channels
on_error = 'warn' if suffix == 'ieeg' else 'ignore'
electrodes_fname = _find_matching_sidecar(bids_path,
suffix='electrodes',
extension='.tsv',
on_error=on_error)
coordsystem_fname = _find_matching_sidecar(bids_path,
suffix='coordsystem',
extension='.json',
on_error=on_error)
if electrodes_fname is not None:
if coordsystem_fname is None:
raise RuntimeError(f"BIDS mandates that the coordsystem.json "
f"should exist if electrodes.tsv does. "
f"Please create coordsystem.json for"
f"{bids_path.basename}")
if datatype in ['meg', 'eeg', 'ieeg']:
_read_dig_bids(electrodes_fname,
coordsystem_fname,
raw=raw,
datatype=datatype)
# Try to find an associated sidecar .json to get information about the
# recording snapshot
sidecar_fname = _find_matching_sidecar(bids_path,
suffix=datatype,
extension='.json',
on_error='warn')
if sidecar_fname is not None:
raw = _handle_info_reading(sidecar_fname, raw)
# read in associated scans filename
scans_fname = BIDSPath(subject=bids_path.subject,
session=bids_path.session,
suffix='scans',
extension='.tsv',
root=bids_path.root).fpath
if scans_fname.exists():
raw = _handle_scans_reading(scans_fname, raw, bids_path)
# read in associated subject info from participants.tsv
participants_tsv_path = bids_root / 'participants.tsv'
subject = f"sub-{bids_path.subject}"
if op.exists(participants_tsv_path):
raw = _handle_participants_reading(
participants_fname=participants_tsv_path, raw=raw, subject=subject)
else:
warn(f"participants.tsv file not found for {raw_path}")
assert raw.annotations.orig_time == raw.info['meas_date']
return raw
