clusterstats empty cfg.neighbours, cfg.neighbours example

[Chetan Sharma]

Thank you for the help, I am using statfun_indepZCoh, and hoping to cluster
over maxsize in freq_time. The problem is that specifying cfg.neighbours =
[] causes a problem in findcluster(). I modified line 175 in clusterstats to
do reshape [cfg.dim(2:end) 1], but I now run into an error at line 38 of
findcluster().

The problem is that makechanneighbstructmat(cfg) returns a 2x2 matrix of
zeros when passed a cfg.neighbours = []. As a result it doesn't pass the
check at line 37 of findcluster.m, which is:

length(size(spatdimneighbstructmat))~=2 ||
~all(size(spatdimneighbstructmat)==spatdimlength)

So that's why I'd like to know, what should the neighbstructmat that is
returned by makechanneighbstructmat() look like when passed cfg.neighbours =
[]? It doesn't seem like it should be a 2x2 matrix of zeros.
-chetan

On Mon, Mar 8, 2010 at 9:00 AM, Robert Oostenveld <
r.oostenveld at fcdonders.ru.nl> wrote:

> And also, what should the channeighbstructmat look like when doing
>> freq_time clustering? When I do the fix mentioned above, it returns a 2x2
>> matrix of zeros, which causes problems in findcluster(). I've read over the
>> neighbourselection(), but it doesn't give any clues for freq_time
>> clustering.
>>
>
>
> neighbourselection is only for specifying neighbouring channels.
> Neighbouring timepoints and frequencies have a trivial definition and don'h
> have to be specified. If you only want clustering in time and frequency and
> not over channels, you shoudl specify cfg.neighbours = {} or [] (I don't
> know for sure which emnptyit should be right now).
>
> best
> Robert
>
>
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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.
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