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Import non-marker streams as events #4

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Import non-marker streams as events #4

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ae20f32
Update eeg_load_xdf.m
mgbleichner Feb 23, 2021
0d4624b
Import non-marker stream as event
mgbleichner Feb 23, 2021
2c51f87
Added stream as event option
mgbleichner Feb 23, 2021
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37 changes: 28 additions & 9 deletions eeg_load_xdf.m
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Original file line number Diff line number Diff line change
Expand Up @@ -77,15 +77,8 @@
% chanlocs...
chanlocs = struct();
try
if ~iscell(stream.info.desc.channels.channel)
warning('Channel structure not a cell array (likely a g.tek writer compatibility issue; Using hack to import channel info)');
end
for c=1:length(stream.info.desc.channels.channel)
if iscell(stream.info.desc.channels.channel)
chn = stream.info.desc.channels.channel{c};
else
chn = stream.info.desc.channels.channel(c);
end
chn = stream.info.desc.channels.channel{c};
if isfield(chn,'label')
chanlocs(c).labels = chn.label; end
if isfield(chn,'type') && strcmpi(chn.type, 'EEG')
Expand Down Expand Up @@ -130,7 +123,7 @@
% events...
event = [];
for s=1:length(streams)
if (strcmp(streams{s}.info.type,'Markers') || strcmp(streams{s}.info.type,'Events')) && ~ismember(streams{s}.info.name,args.exclude_markerstreams)
if (strcmp(streams{s}.info.type,'Markers') || strcmp(streams{s}.info.type,'Events') ) && ~ismember(streams{s}.info.name,args.exclude_markerstreams)
try
s_events = struct('type', '', 'latency', [], 'duration', num2cell(ones(1, length(streams{s}.time_stamps))));
for e=1:length(streams{s}.time_stamps)
Expand All @@ -146,6 +139,32 @@
disp(['Could not interpret event stream named "' streams{s}.info.name '": ' err.message]);
end
end
% Import non-marker stream as event
% All non-zero elements are considered as events
if strcmp(streams{s}.info.name,args.stream_as_event)
try
%
onset_Indices=find(streams{s}.time_series);
disp(['Interpreting all non zero entries as events.']);
s_events = struct('type', '', 'latency', [], 'duration', num2cell(ones(1, length(onset_Indices))));
event_index=1;
for e=onset_Indices
if iscell(streams{s}.time_series)
s_events(event_index).type = streams{s}.time_series{e};
else
s_events(event_index).type = num2str(streams{s}.time_series(e));
end
[~, s_events(event_index).latency] = min(abs(stream.time_stamps - streams{s}.time_stamps(e)));
event_index=event_index+1;
end
event = [event, s_events]; %#ok<AGROW>


catch err
disp(['Problems reading AFEx data "' streams{s}.info.name '": ' err.message]);

end
end
end
raw.event = event;

Expand Down
7 changes: 6 additions & 1 deletion pop_loadxdf.m
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Original file line number Diff line number Diff line change
Expand Up @@ -73,12 +73,14 @@

% popup window parameters
% -----------------------
uigeom = { [1 0.5] [1 0.5] [1 0.5] 0.13};
uigeom = { [1 0.5] [1 0.5] [1 0.5] [1 0.5] 0.13};
uilist = { { 'style' 'text' 'string' 'Stream name to import:' } ...
{ 'style' 'edit' 'string' '' } ...
{ 'style' 'text' 'string' 'Stream type to import:' } ...
{ 'style' 'edit' 'string' 'EEG' } ...
{ 'style' 'text' 'string' 'Exclude marker streams(s):' } ...
{ 'style' 'edit' 'string' '{}' } ...
{ 'style' 'text' 'string' 'Stream name to import as event:' } ...
{ 'style' 'edit' 'string' '{}' } {}};

result = inputgui(uigeom, uilist, 'pophelp(''pop_loadxdf'')', 'Load an XDF file');
Expand All @@ -93,6 +95,9 @@
options = [options ', ''streamtype'', ''' result{2} '''']; end
if ~isempty(result{3}),
options = [options ', ''exclude_markerstreams'', ' result{3} '']; end
if ~isempty(result{4}),
options = [options ', ''stream_as_event'', ''' result{4} '''']; end

else
options = vararg2str(varargin);
end;
Expand Down