single trial source signal

[Hanneke Van Dijk]

Dear Vasan,

Since I don't know exactly how far you are in doing the analysis, I just send you the basic script that shows the most important parameters. Don't forget to do freqanalysis with cfg.output = 'fourier' and cfg.method = 'mtmfft' for the specific frequency (cfg.foilim) you want to focus on.

cfg                 = [];
cfg.grid.pos        = location of source coordinate;% [x y z] to fill in
cfg.frequency       = frequency of interest;
cfg.vol             = headmodel; %to make yourself see http://fieldtrip.fcdonders.nl/example/make_leadfields_using_different_headmodels
cfg.projectnoise    = 'yes';%to compute the neural activity index using sourcedescriptives
cfg.lambda          = '10%';%the amount of noice to estimate estimated
cfg.method          = 'pcc';
cfg.keeptrials      = 'yes';
Virtual_channeldata = sourceanalysis(cfg,freq);

You can do sourcedescriptives after that.

'help freqanalysis', 'help sourceanalysis' and 'help sourcedescriptives' should also help you further. Or you could have a look at the fieldtrip website. There are a lot of options to taylor the analysis to your data.

Hope this helps!

Best,

Hanneke van Dijk

------------------------------------------------------------
Institute for Clinical Neuroscience and Medical Psychology
Heinrich Heine Universitaet, Duesseldorf, Germany
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-----Oorspronkelijk bericht-----
Van: FieldTrip discussion list namens Rajamoni Nadar, Sreenivasan (NIH/NIMH) [E]
Verzonden: do 26.11.2009 14:53
Aan: FIELDTRIP at NIC.SURFNET.NL
Onderwerp: [FIELDTRIP] single trial source signal
 
FieldTrip Users,

Is it possible to get single trial source signal using FieldTrip? I would appreciate if anybody could provide code for the same.

Thank you,
Vasan
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The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html and http://www.ru.nl/neuroimaging/fieldtrip.


----------------------------------
The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html and http://www.ru.nl/neuroimaging/fieldtrip.