[FieldTrip] MEG grad data after ICA cleaning

Haiteng Jiang haiteng.jiang at gmail.com
Thu Mar 6 09:37:18 CET 2014


>
> Hi Fred,
>
       I use the same code , but the updated grad  is stored in the data.
meg_data.hdr.grad is the  grad before ICA.  After  ICA ,  grad needs to be
adjusted  ,which is used for the later source reconstruction .  Do you have
the latest FT ?

                                   Best,
                                   Haiteng


> ------------------------------
>
> Message: 5
> Date: Wed, 5 Mar 2014 16:28:58 +0100 (CET)
> From: Fr?d?ric Roux <f.roux at bcbl.eu>
> To: FieldTrip discussion list <fieldtrip at science.ru.nl>
> Subject: [FieldTrip] MEG grad data after ICA cleaning
> Message-ID: <341671566.860154.1394033338749.JavaMail.root at bcbl.eu>
> Content-Type: text/plain; charset=utf-8
>
> Dear all,
>
> I am using ICA to clean my MEG-data before source analysis.
>
> My code looks as follows:
>
> cfg = [];
> cfg.component = [comp_idx];
>
> meg_data = ft_rejectcomponent(cfg,comp,meg_data);
>
> However, after the call to ft_rejectcomponent there is no grad field in
> the meg_data structure. Rather, the grad field ist located under
> meg_data.hdr.grad.
>
> Is this the grad-field that I am supposed to use further downstream in the
> analysis pipeline, or should there be a grad-field under meg_data.grad?
>
> Any help would be much appreciated.
>
> Fred
>
>
>
-- 
Haiteng Jiang
PhD candidate
Neuronal Oscillations Group
Donders Institute for Brain, Cognition and Behaviour
Centre for Cognitive Neuroimaging
Radboud University Nijmegen

Visiting address
Room 2.32
Donders Centre for Cognitive Neuroimaging
Kapittelweg 29
6525 EN  Nijmegen
the Netherlands

 Tel.: +31 (0)243668291
 Web:  https://sites.google.com/site/haitengjiang/
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