[FieldTrip] Fieldtrip ICA crashes Matlab
Hwee Ling Lee
hweeling.lee at gmail.com
Mon Mar 31 16:48:34 CEST 2014
Dear all,
I'm encountering a problem with running ICA in Matlab. After ICA, when I
tried to plot the components, Matlab keeps prompting an internal problem
and needs to be closed. I wonder why this is the case. Could someone please
tell me what went wrong?
Here's part of my script for ICA:
cfg = []; % if data were cleaned, then use this
if sub == 5 %|| sub == 7
cfg.channel = {'all', '-AFz', '-FT7'};
elseif sub == 7
cfg.channel = {'all' '-AFz'};
else
cfg.channel = {'all'};
end
% cfg.runica.pca = 121; % using the rank of my data
% ic_data = ft_componentanalysis(cfg,cleandata); % if data were
cleaned then use this
ic_data = ft_componentanalysis(cfg, cleandata);
% after ICA, look for components that we want to substract from our
data,
% only looking at ten channels (components) at a time
cfg = [];
cfg.dataset = rawdatafile;
cfg.viewmode = 'component';
cfg.continuous = 'no';
cfg.blocksize = 8;
cfg.channels = 'all';
cfg.layout = 'EEG1020.lay';
ft_databrowser(cfg,ic_data);
The internal problem appears even when I downsampled my data from 5000 Hz
to 1000 Hz.
The internal problem appears also when I have short segments of my data
(i.e. 2s per trial), and long segments of my data (i.e. 6s per trial).
The memory of my PC workstation is:
Maximum possible array: 60253 MB (6.318e+10 bytes) *
Memory available for all arrays: 60253 MB (6.318e+10 bytes) *
Memory used by MATLAB: 560 MB (5.872e+08 bytes)
Physical Memory (RAM): 32685 MB (3.427e+10 bytes)
Interestingly, this internal problem does not occur when I ran my script on
my Macbook Pro.
I'm feeling very lost here. Any help is highly appreciated.
Cheers,
Hweeling
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