[FieldTrip] ft_channelrepair not finding electrodes

["Jörn M. Horschig"]

Hi Max,

check out Fieldtrip/template/electrode and see if you can use one of the 
templates in there. Best would be to use electrode measurements that you 
actually performed yourself (to get the distances between electrodes 
right), but using a template might be good as well. Once you found a 
good template-file, you can set cfg.elecfile = 'folder/filename' and 
FieldTrip will handle the rest.
Otherwise, if some of your colleagues have electrode measurements, you 
can also ask them for advice.

Best,
Jörn

On 11/15/2013 5:40 PM, Max Cantor wrote:
> Hi all,
>
> I'm trying to perform channel repair on EEG data that has undergone 
> jump, muscle, and visual artifact rejection, and ICA to remove eog and 
> ecg components, unmixed back into the original channels. It's a 61 
> channel system using a modified easycap layout and neighbours template.
>
> The layout has been shown to work on topographic displays, and the 
> template seems to work in that it creates a neighbours object when 
> ft_prepare_neighbours is run on it without any errors.
>
> However, I'm getting an error when I attempt to run ft_channelrepair:
>
> Error using ft_fetch_sens (line 179)
> no electrodes or gradiometers specified.
>
> Error in ft_channelrepair (line 112)
>   sens = ft_fetch_sens(cfg, data);
>
> I'm not currently using ft_datatype_sens or ft_read_sens, as I'm not 
> really sure what elec/sens file I should be reading or how to go about 
> creating it. I was hoping that the template, my data, and/or the 
> layout would contain the necessary information, but given the error on 
> ft_fetch_sens, that doesn't seem to be the case.
>
> Any help on this issue would be greatly appreciated.
>
> Thanks,
>
> Max
>
>
> _______________________________________________
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> fieldtrip at donders.ru.nl
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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
FieldTrip Development Team

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
Web: http://www.ru.nl/donders

Visiting address:
Trigon, room 2.30
Kapittelweg 29
NL-6525 EN Nijmegen
The Netherlands

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