test_gazepoint.m

% This file imports a Gazepoint eye-tracking file as well as the corresponding
% EEG file from one subject of the Child Mind database and aligns the two

% Arnaud Delorme, Dec 2013

EEG = pop_loadset('hbn_eye_tracking_data/NDARAA773LUW_SurroundSupp_Block1.set');
EEG = pop_eegfiltnew(EEG, 1);
EEG = pop_eegfiltnew(EEG, 0, 40);

EYE = pop_read_gazepoint('hbn_eye_tracking_data/NDARAA773LUW_SurrSupp_Block1.tsv');

if isfield(EYE.event, 'description') % use for type
    fprintf('Warning: using description field in eye-tracking channel for event type\n')
    for iEvent = 1:length(EYE.event)
        if ~isempty(EYE.event(iEvent).description)
            EYE.event(iEvent).type = deblank(EYE.event(iEvent).description);
        end
    end
end
EYE = eeg_checkset(EYE, 'eventconsistency');
[MERGEDEEG] = eeg_mergechannels(EEG, EYE);

disp('there is no event in the eye-tracking file except for the experimental');
disp('events so checking alignment is not as easy as with SMI files');