Undefined function or variable "sens"

Vladimir Litvak v.litvak at ION.UCL.AC.UK
Tue Jul 8 17:24:32 CEST 2008


I don't think it's a matter of 'light', but it might be a matter of a
different FT version. If you look in neighbourselection.m there is a
comment

% Revision 1.8  2007/05/14 08:26:31  roboos
% added option to construct neighbours from 2-D layout

So if you FT dates prior to that date, it cannot determine neighbour
relations based on 2D layout. Update your FT and see if it solves the
problem. Without layout and without 3D electrode positions it won't
work and rightly so. With layout it should work if your FT is up to
date.

Best,

Vladimir



On Tue, Jul 8, 2008 at 10:46 AM, A. Stolk <A.Stolk at ewi.utwente.nl> wrote:
> If I add my own EEG.lay, the function does work well. If I leave it out, it does give the errors mentioned below. This problem is somehow absent in the 'light' fieldtrip edition installed on another computer.
>
> Regards,
>
> Arjen Stolk
>
> ________________________________
>
> Van: FieldTrip discussion list namens A. Stolk
> Verzonden: di 7/8/2008 10:36
> Aan: FIELDTRIP at NIC.SURFNET.NL
> Onderwerp: Re: [FIELDTRIP] Undefined function or variable "sens"
>
>
>
> Thank you for your quick reply. I indeed do use a self-made EEG.lay, but am not using the neighbourselection.m.
> I do manage to get my script to work on another computer, but somehow not on this one.
>
> ________________________________
>
> Van: FieldTrip discussion list namens Vladimir Litvak
> Verzonden: do 7/3/2008 5:10
> Aan: FIELDTRIP at NIC.SURFNET.NL
> Onderwerp: Re: [FIELDTRIP] Undefined function or variable "sens"
>
>
>
> Do you actually have electrode positions somewhere in your data? They
> are not usually supposed to get there by themselves so unless you
> somehow got them there (like read in a file with sensor positions),
> they are indeed missing. For statistics you don't actually need sensor
> positions You can specify the neighborhood relations 'by hand' instead
> of calling neighbourselection.
>
> Best,
>
> Vladimir
>
> On Thu, Jul 3, 2008 at 3:05 PM, A. Stolk <A.Stolk at ewi.utwente.nl> wrote:
>> Dear fieldtrippers,
>>
>> While performing statitstical analysis on time-frequency EEG data, I get the following error:
>>
>> ??? Undefined function or variable "sens".
>> Error in ==> neighbourselection at 106
>> if ~isstruct(sens)
>> Error in ==> statistics_wrapper at 226
>>    cfg.neighbours = neighbourselection(cfg,varargin{1});
>> Error in ==> freqstatistics at 132
>> [stat] = statistics_wrapper(cfg, varargin{:});
>> Error in ==> fieldtripstatanalyse at 70
>> [stat] = freqstatistics(cfg, stimulusFFT, baselineFFT);
>>
>> The neighbourselection function tells:
>>
>> if ~isstruct(sens)
>>
>> error('Did not find gradiometer or electrode information.');
>>
>>
>>
>> which gets its data by:
>>
>> % Revision 1.6 2006/07/12 14:14:59 roboos
>>
>> % get sens from data.grad/elec
>>
>>
>>
>> I get this error on several matlab and fieldtrip versions. Any suggestions how to solve this?
>>
>>
>>
>> Regards,
>>
>> Arjen Stolk
>>
>>
>>
>> ----------------------------------
>> 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/fcdonders/fieldtrip.
>>
>>
>
> ----------------------------------
> 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/fcdonders/fieldtrip.
>
> ----------------------------------
> 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/fcdonders/fieldtrip.
>
> ----------------------------------
> 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/fcdonders/fieldtrip.
>
>

----------------------------------
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/fcdonders/fieldtrip.



More information about the fieldtrip mailing list