[FieldTrip] error with databrowser after rejecting components in ICA
Lei, A. (Anqi)
anqi.lei at ru.nl
Sat Mar 26 10:10:35 CET 2022
Hello,
I was performing ICA on my EEG data and the script was running smoothly until I rejected bad components using 'ft_rejectcomponent' – after that I couldn't visualize my data using databrowser and got this error:
"Error using ft_fetch_data (line 168)
some of the requested samples occur twice in the data and have conflicting values"
This is the script I used for ICA, could you let me know what might be wrong? Thank you so much!
%% ICA
%Decomposition of EEG data
cfg = [];
cfg.resamplefs = 150;
cfg.detrend = 'no';
data = ft_resampledata(cfg, data_all);
cfg = [];
cfg.method = 'runica'; % this is the default and uses the implementation from EEGLAB
comp = ft_componentanalysis(cfg, data);
%Identify components reflecting eye artifacts
% plot the components for visual inspection
figure
cfg = [];
cfg.component = 1:20; % specify the component(s) that should be plotted
cfg.layout = 'acticap-64ch-standard2_XZ.mat'; % specify the layout file that should be used for plotting
cfg.comment = 'no';
ft_topoplotIC(cfg, comp)
%Removing bad artifacts and backprojecting data
cfg = [];
cfg.component = [1 2]; % e.g. to be removed component(s)
data_all = ft_rejectcomponent(cfg, comp, data_all);
%Display data (this is where the error message occurs)
cfg = [];
cfg.layout = 'acticap-64ch-standard2_XZ.mat'; % specify the layout file that should be used for plotting
cfg.viewmode = 'vertical';
ft_databrowser(cfg, data_all);
Best,
Anqi
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