artifact rejection

[Esther Meeuwissen]

Robert Oostenveld wrote:
> Hi Esther,
>
> On 26 Jun 2006, at 15:04, Esther Meeuwissen wrote:
>> and get the following error message:
>>
>>  Error using ==> horzcat
>> CAT arguments dimensions are not consistent.
>>
>> Error in ==> rejectartifact at 182
>>     cfg.artfctdef.type = [{'file'} cfg.artfctdef.type];
>
> I suspect here that cfg.artfctdef.type is a cell-array with strings
> represented as a vertical cell-vector, and that line 182 tries to
> combine it with something that Matlab treats as horizontal
> cell-vector. It is unclear to me why it does that, since the
> cfg.artfctdef.type is built up internally (you did not explicitely
> specify it).
>
>> Error in ==> preprocessing at 317
>> [cfg] = rejectartifact(cfg);
>>
>> Error in ==> preproesther1 at 45
>> data = preprocessing(cfg);
>>
>> By trying to make it work I figured out that it is possible to do
>> both the
>> artifact rejection parts separately using (parts of) the script above
>> but
>> (Fieldtrip wants to combine two matrices to 1 matrix and that is what
>> goes
>> wrong). Does anyone know how (/whether) it is possible to do a artifact
>> detection/rejection in Fieldtrip partly using functions of Fieldtrip
>> itself and partly read markers of EEG parts containing a artifact (the
>> file made by brain vision analyzer)?
>
> I have tried replicating your problem (with the data that I found on
> /home/electromag/estmee/GOs/analyses/datagoed), but did not encounter
> any problems up to the definetrial, artifatc_muscle and
> rejectartifact. However, the problem comes only in when preprocessing
> is called. For backward compatibility with other peoples old scripts,
> preprocessing is also calling definetrial and rejhectartifact, and
> rejectartifact seems confused by being called twice.
>
> I made a small change to rejectartifact that hopefully fixes the
> problem. The updated version is on home/common now and will be on the
> ftp this evening.
>
> best regards,
> Robert
>