[Eeglablist] Clustering Problmes - update

[arno]

Dear Michael,

thank you for your message and your comments. It seems that the problem 
might be that, as you increase the number of clusters, one of the 
cluster is empty which might be why the function crash? It would be 
worth checking the cluster structure (STUDY.cluster) to see if there is 
any empty cluster before you start plotting anything. Then (if the 
problem is indeed about empty cluster), I think the way to fix the bug 
is to remove any empty cluster before plotting.

For further development on this issue, would you mind submitting a bug 
onto our Bugizlla for EEGLAB database.

https://sccn.ucsd.edu/eeglab/bugzilla/createaccount.cgi

Best regards,

Arno

Ps: when you submit your bug to the database, please include my comment 
above so we can keep track of it.

wibral at mpih-frankfurt.mpg.de wrote:
> Dear Listusers,
>
> I have meanwhile tried quite a few combinations of IC features to
> determine the distances used in clustering and also toyed with the
> dimensionality of the feature vectors, but there seems to be a problem
> when clustering > 18 components, independent of what I feed the
> algorithm.
> I hope this helps to track down the problem. Clustering with up to 18
> Clusters works well, although the numbers of components in the clusters
> vary widely (of course).
>
> There is another, possibly related error: When I try to plot the scalp
> maps of the components of a cluster, I get the following error message:
>
> Drawing components of cluster (all at once)...
> ??? Attempted to access grid_pol(1,2); index out of bounds because
> numel(grid_pol)=1.
>
> Error in ==> std_topoplot at 148
>                 grid_pol = sign(grid_pol(1,2));
>
> Error in ==> pop_clustedit at 484
>                     eval(['STUDY = std_' plotting_option '(STUDY,ALLEEG,
> ''clusters'','  num2str(cls(clus-1)) ', ''mode'', ''comps'' );'  ]);
>
> ??? Error using ==> pop_clustedit('plotcomptopo',gcf); 
> Attempted to access grid_pol(1,2); index out of bounds because
> numel(grid_pol)=1.
>
> ??? Error using ==> waitfor
> Error while evaluating uicontrol Callback
>
>
> Best Regards,
> Michael Wibral