Importing 4-D datasets

Gopakumar Venugopalan venug001 at BAMA.UA.EDU
Wed Jan 16 13:36:27 CET 2008


Greeting Robert, thanks for the freeware and assistance. Nathan has
been very,very helpful from the outset.


I am truly grateful to all out there



best regards
gopa


Quoting Robert Oostenveld <r.oostenveld at FCDONDERS.RU.NL>:

> Hi Gopa
>
> Regarding combined EEG and MEG data, of course we also have this
> often with our CTF MEG system. The sensor locations stored in a
> preprocessed combined EEG+MEG data structure at the moment can not
> contain mixed EEG and MEG positions. Usually you will want to do
> source reconstruction with the MEG channels. In that case the data
> (after preprocessing, timelockanalysis or freqanalysis or
> componentanalysis) should have the field data.grad. If you want to do
>
> sourceanalysis/dipolefitting on the EEG channels, you should remove
>
> the data.grad field and instead insert a field into the data with the
>
> name data.elec.  See http://www2.ru.nl/fcdonders/fieldtrip/doku.php?
>
>
id=fieldtrip:documentation:frequently_asked_questions#how_are_electrodes
>
> _magnetometers_or_gradiometers_described for fuether details.
>
> On 11 Jan 2008, at 14:28, Nathan Weisz wrote:
> > you may try:
> > cfg.channel={'EEG'};
> > and see if it only applies the relevant functions to the EEG
> > channels (i haven't done this myself). if not you can specify all
>
> > labels by hand or add something to the channelselction.m function
>
> > that suits your needs.
>
> Usefull here might also be to specify cfg.channel='gui' and a
> graphical interface will pop up allowing you to select channels with
>
> the mouse.
>
> best regards,
> Robert
>
> ----------------------------------
> 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/fcdonders/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/fcdonders/fieldtrip.



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