[FieldTrip] Defining cfg.neighbourdist at source level

["Jörn M. Horschig"]

Dear Ulrich,

I think you are confusing some things there. cfg.neighbourdist is a 
setting for defining neighbouring /sensors/, thus it's not applicable 
for source level statistics (see ft_prepare_neighbours). However, I 
never did cluster-based permutation test on source-level in FieldTrip, 
but for me it seems that it just works by taking neighbouring voxels as 
neighbours. So, you shouldn't need to define anything special for 
running sourcelevel stats (if I am wrong, someone with more experience 
should correct me here).
But, maybe you meant to write sensor level, but wrote source level - in 
that case I'd be happy to help.

Best,
Jörn

On 1/27/2012 4:34 PM, Pomper, Ulrich wrote:
> Dear list members,
> I am trying to perform a cluster based permutation test on power 
> values at source level.
> I managed to run the test using just the time and frequency dimensions 
> (cfg.neighbourdist = [])
> but I am struggling with the issue of how to define the neighbourdist 
> parameter.
> I've looked through the tutorial, the FT site as well as through the 
> mailinglist but couldn't find an answer, so I'd really appreciate any 
> hint on this.
>
> Thanks a lot,
> Ulrich
>
>
>
>
>
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-- 
Jörn M. Horschig
PhD Student
Donders Institute for Brain, Cognition and Behaviour
Centre for Cognitive Neuroimaging
Radboud University Nijmegen
Neuronal Oscillations Group

P.O. Box 9101
NL-6500 HB Nijmegen
The Netherlands

Contact:
E-Mail: jm.horschig at donders.ru.nl
Tel:    +31-(0)24-36-68493
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