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pop_exportbids.m
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pop_exportbids.m
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% pop_exportbids() - Export EEGLAB study into BIDS folder structure
%
% Usage:
% pop_exportbids(STUDY, ALLEEG, 'key', val);
%
% Inputs:
% bidsfolder - a loaded epoched EEG dataset structure.
%
% Note: 'key', val arguments are the same as the one in bids_export()
%
% Authors: Arnaud Delorme, SCCN, INC, UCSD, January, 2019
% Copyright (C) Arnaud Delorme, 2019
%
% This program is free software; you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation; either version 2 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; if not, write to the Free Software
% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
function [STUDY,EEG,comOut] = pop_exportbids(STUDY, EEG, varargin)
comOut = '';
if isempty(STUDY)
error('BIDS export can only export EEGLAB studies');
end
if nargin < 2
error('This function needs at least 2 parameters');
end
if nargin < 3 && ~ischar(STUDY)
com = [ 'bidsFolderxx = uigetdir(''Pick a BIDS output folder'');' ...
'if ~isequal(bidsFolderxx, 0), set(findobj(gcbf, ''tag'', ''outputfolder''), ''string'', bidsFolderxx); end;' ...
'clear bidsFolderxx;' ];
cb_task = 'pop_exportbids(''edit_task'', gcbf);';
cb_eeg = 'pop_exportbids(''edit_eeg'', gcbf);';
cb_participants = 'pop_exportbids(''edit_participants'', gcbf);';
cb_events = 'pop_exportbids(''edit_events'', gcbf);';
uilist = { ...
{ 'Style', 'text', 'string', 'Export EEGLAB study to BIDS', 'fontweight', 'bold' }, ...
{} ...
{ 'Style', 'text', 'string', 'Output folder:' }, ...
{ 'Style', 'edit', 'string', fullfile('.', 'BIDS_EXPORT') 'tag' 'outputfolder' }, ...
{ 'Style', 'pushbutton', 'string', '...' 'callback' com }, ...
{ 'Style', 'text', 'string', 'Licence for distributing:' }, ...
{ 'Style', 'edit', 'string', 'Creative Common 0 (CC0)' 'tag' 'license' }, ...
{ 'Style', 'text', 'string', 'CHANGES compared to previous releases:' }, ...
{ 'Style', 'edit', 'string', '' 'tag' 'changes' 'HorizontalAlignment' 'left' 'max' 3 }, ...
{ 'Style', 'pushbutton', 'string', 'Edit task & EEG info' 'tag' 'task' 'callback' cb_task }, ...
{ 'Style', 'pushbutton', 'string', 'Edit participants' 'tag' 'participants' 'callback' cb_participants }, ...
{ 'Style', 'pushbutton', 'string', 'Edit event info' 'tag' 'events' 'callback' cb_events }, ...
{ 'Style', 'checkbox', 'string', 'Do not use participants IDs and create anonymized participants IDs instead' 'tag' 'newids' }, ...
};
relSize = 0.7;
geometry = { [1] [1] [1-relSize relSize*0.8 relSize*0.2] [1-relSize relSize] [1] [1] [1 1 1] [1]};
geomvert = [1 0.2 1 1 1 3 1 1];
userdata.EEG = EEG;
userdata.STUDY = STUDY;
[results,userdata,~,restag] = inputgui( 'geometry', geometry, 'geomvert', geomvert, 'uilist', uilist, 'helpcom', 'pophelp(''pop_exportbids'');', 'title', 'Export EEGLAB STUDY to BIDS -- pop_exportbids()', 'userdata', userdata );
if length(results) == 0, return; end
STUDY = userdata.STUDY;
EEG = userdata.EEG;
% decode some outputs
if ~isempty(strfind(restag.license, 'CC0')), restag.license = 'CC0'; end
% if ~isempty(restag.authors)
% authors = textscan(restag.authors, '%s', 'delimiter', ';');
% authors = authors{1}';
% else
% authors = { '' };
% end
% options
options = { 'targetdir' restag.outputfolder 'License' restag.license 'CHANGES' restag.changes 'createids' fastif(restag.newids, 'on', 'off') 'individualEventsJson' 'off'};
if ~isfield(EEG(1), 'BIDS') % none of the edit button was clicked
EEG = pop_eventinfo(EEG, STUDY, 'default');
EEG = pop_participantinfo(EEG, STUDY, 'default');
EEG = pop_taskinfo(EEG, 'default');
end
if ~isfield(EEG(1).BIDS.tInfo, 'PowerLineFrequency') || isnan(EEG(1).BIDS.tInfo.PowerLineFrequency)
uiList = { { 'style' 'text' 'string' 'You must specify power line frequency' } ...
{ 'style' 'popupmenu' 'string' {'50' '60' }} };
res = inputgui('title', 'Missing required information', 'uilist', uiList, 'geometry', {[ 1 0.4 ]});
if isempty(res), return; end
for iEEG = 1:length(EEG)
if res{1} == 1
EEG(iEEG).BIDS.tInfo.PowerLineFrequency = 50;
else
EEG(iEEG).BIDS.tInfo.PowerLineFrequency = 60;
end
EEG(iEEG).saved = 'no';
end
end
elseif ischar(STUDY)
command = STUDY;
fig = EEG;
userdata = get(fig, 'userdata');
switch command
case 'edit_participants'
userdata.EEG = pop_participantinfo(userdata.EEG);
case 'edit_events'
userdata.EEG = pop_eventinfo(userdata.EEG);
case 'edit_task'
userdata.EEG = pop_taskinfo(userdata.EEG);
case 'edit_eeg'
userdata.EEG = pop_eegacqinfo(userdata.EEG);
end
set(fig, 'userdata', userdata);
return
else
options = varargin;
end
% rearrange information in BIDS structures
if ~isfield(EEG, 'BIDS')
EEG(1).BIDS = struct([]);
end
if isfield(EEG(1).BIDS, 'gInfo') && isfield(EEG(1).BIDS.gInfo,'README')
options = [options 'README' {EEG(1).BIDS.gInfo.README}];
EEG(1).BIDS.gInfo = rmfield(EEG(1).BIDS.gInfo,'README');
end
if isfield(EEG(1).BIDS, 'gInfo') && isfield(EEG(1).BIDS.gInfo,'TaskName')
options = [options 'taskName' {EEG(1).BIDS.gInfo.TaskName}];
EEG(1).BIDS.gInfo = rmfield(EEG(1).BIDS.gInfo,'TaskName');
end
if isfield(STUDY, 'task')
options = [options { 'taskName' STUDY.task }];
end
bidsFieldsFromALLEEG = fieldnames(EEG(1).BIDS); % All EEG should share same BIDS info -> using EEG(1)
% tInfo.SubjectArtefactDescription is not shared, arguments passed as `notes` below
for f=1:numel(bidsFieldsFromALLEEG)
if ~isequal(bidsFieldsFromALLEEG{f}, 'behavioral') && ~isequal(bidsFieldsFromALLEEG{f}, 'bidsstats')
options = [options bidsFieldsFromALLEEG{f} {EEG(1).BIDS.(bidsFieldsFromALLEEG{f})}];
else
warning('Warning: cannot re-export behavioral data yet')
end
end
% get subjects and sessions
% -------------------------
if ~isempty(EEG(1).subject)
allSubjects = { EEG.subject };
elseif ~isempty(STUDY.datasetinfo(1).subject)
allSubjects = { STUDY.datasetinfo.subject };
else
error('No subject info found in either EEG or STUDY.datasetinfo. Please add using Study > Edit STUDY info');
end
if ~isempty(STUDY.datasetinfo(1).session)
allSessions = { STUDY.datasetinfo.session };
else
allSessions = { EEG.session };
end
[~,inds] = unique(allSubjects);
uniqueSubjects = allSubjects(sort(inds));
allSessions(cellfun(@isempty, allSessions)) = { 1 };
allSessions = cellfun(@num2str, allSessions, 'uniformoutput', false);
uniqueSessions = unique(allSessions);
% export STUDY to BIDS
% --------------------
pInfo = {}; % each EEG file has its own pInfo --> need to aggregate
if isfield(EEG(1), 'BIDS') && isfield(EEG(1).BIDS,'pInfo')
pInfo = EEG(1).BIDS.pInfo(1,:);
end
subjects = struct('file',{}, 'session', [], 'run', [], 'task', {});
% duration field (mandatory)
if ~isempty(EEG(1).event) && ~isfield(EEG(1).event, 'duration')
for iEEG = 1:length(EEG)
EEG(iEEG).event(1).duration = [];
EEG(iEEG).saved = 'no';
end
end
% resave dataset
fileAbsent = any(cellfun(@isempty, { EEG.filename }));
if fileAbsent
error('Datasets need to be saved before being exported');
end
saved = any(cellfun(@(x)isequal(x, 'no'), { EEG.saved }));
for iSubj = 1:length(uniqueSubjects)
indS = strmatch( uniqueSubjects{iSubj}, allSubjects, 'exact' );
for iFile = 1:length(indS)
subjects(iSubj).file{iFile} = fullfile( EEG(indS(iFile)).filepath, EEG(indS(iFile)).filename);
if isfield(EEG(indS(iFile)), 'session') && ~isempty(EEG(indS(iFile)).session)
subjects(iSubj).session(iFile) = EEG(indS(iFile)).session;
else
subjects(iSubj).session(iFile) = iFile;
end
if isfield(EEG(indS(iFile)), 'run') && ~isempty(EEG(indS(iFile)).run)
subjects(iSubj).run(iFile) = EEG(indS(iFile)).run;
else
subjects(iSubj).run(iFile) = 1; % Assume only one run
end
if isfield(EEG(indS(iFile)), 'task') && ~isempty(EEG(indS(iFile)).task)
subjects(iSubj).task{iFile} = EEG(indS(iFile)).task;
% blank task field will be filled in bids_export.m
end
if isfield(EEG(indS(iFile)).BIDS, 'tInfo') && isfield(EEG(indS(iFile)).BIDS.tInfo, 'SubjectArtefactDescription')...
&& ~isempty(EEG(indS(iFile)).BIDS.tInfo.SubjectArtefactDescription)
subjects(iSubj).notes{iFile} = EEG(indS(iFile)).BIDS.tInfo.SubjectArtefactDescription;
end
end
if isfield(EEG(indS(1)), 'BIDS') && isfield(EEG(indS(1)).BIDS,'pInfo')
pInfo = [pInfo; EEG(indS(1)).BIDS.pInfo(2,:)];
end
end
if ~isempty(pInfo)
options = [options 'pInfo' {pInfo}];
end
if nargin < 3
bids_export(subjects, 'interactive', 'on', options{:});
else
bids_export(subjects, options{:});
end
disp('Done');
% history
% -------
if nargin < 3
% Issue: README file and other inserted as plain text
% The history should have the relevant fields
% comOut = sprintf('pop_exportbids(STUDY, %s);', vararg2str(options));
end
end