[FieldTrip] beamforming - normilise issue

[Davide Rivolta]

Hi Michael,

I am using the single shell (Nolte).

The grid has 2340 positions, but I am not still using mni.

Thanks,

Davide

On Wed, Oct 19, 2011 at 5:44 PM, Michael Wibral <michael.wibral at web.de>wrote:

> Hi davide,
>
> what headmodel and grid are you using?
>
> Michael
>
>
>  ------------------------------
> *Von:* "Davide Rivolta" <drivolta81 at gmail.com>
> *Gesendet:* Oct 19, 2011 3:54:37 PM
> *An:* "Email discussion list for the FieldTrip project" <
> fieldtrip at donders.ru.nl>
> *Betreff:* [FieldTrip] beamforming - normilise issue
>
>
> Dear all,
>
> I am trying to use beamforming for some MEG data.
>
> I have 1 condition, and I wish to compare it against the baseline. Ideally
> I wish to have the average of all group and statistically compare stimulus
> agains baseline..
>
> As such, for each subject I calculate the source for the baseline and the
> source for the stimulus (using a common filter as indicated on the website).
>
> I then call ft_sourceinterpolate and, since I wish to have a group
> analysis, ft_volumenormalise.
> In order to compute the average, I call ft_sourcegrandaverage.
>
> Even though the help tells me that it is fine, the grandaverage does not
> work if the input is from the ft_volumenormalise. It is because there is not
> the ".pos" field!
>
> Am I doing something wrong?
>
> Any advice would be great.
>
> Thanks a lot,
>
> Davide
>
>
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-- 
Davide Rivolta, PhD
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