[Eeglablist] Warning: some channels have the same label

[Makoto Miyakoshi]

Dear Raquel,

I put all the channel labels to tmp and confirmed the following.

>> length(tmp)

ans =

    64

>> length(unique(tmp))

ans =

    64

Hmm so why does it not work?
You probably want to use a debug mode to troubleshoot it.
Open the code and put a breakpoint (red circle) at the left end column of
the line, then run the code. You can see what variables are generated and
what values are assigned. Can you do it to tell me what you see there?

Makoto


On Tue, Oct 18, 2016 at 6:07 AM, Raquel London <
raquel at dragondelapatagonia.com> wrote:

> Dear Makoto,
>
> Thanks for honoring me with so many emails today :)
> Ok, so I typed *{EEG.chanlocs.labels}' *on the command line and I got
> this (see below). I can't find any duplicate labels..
>
> cheers,
> Raquel
>
> 'Fp1'
>     'AF7'
>     'AF3'
>     'F1'
>     'F3'
>     'F5'
>     'F7'
>     'FT7'
>     'FC5'
>     'FC3'
>     'FC1'
>     'C1'
>     'C3'
>     'C5'
>     'T7'
>     'TP7'
>     'CP5'
>     'CP3'
>     'CP1'
>     'P1'
>     'P3'
>     'P5'
>     'P7'
>     'P9'
>     'PO7'
>     'PO3'
>     'O1'
>     'Iz'
>     'Oz'
>     'POz'
>     'Pz'
>     'CPz'
>     'Fpz'
>     'Fp2'
>     'AF8'
>     'AF4'
>     'Afz'
>     'Fz'
>     'F2'
>     'F4'
>     'F6'
>     'F8'
>     'FT8'
>     'FC6'
>     'FC4'
>     'FC2'
>     'FCz'
>     'Cz'
>     'C2'
>     'C4'
>     'C6'
>     'T8'
>     'TP8'
>     'CP6'
>     'CP4'
>     'CP2'
>     'P2'
>     'P4'
>     'P6'
>     'P8'
>     'P10'
>     'PO8'
>     'PO4'
>     'O2'
>
> --
> Dragón de la Patagonia
> Ramon Barros Luco 688
> Puerto Natales - Patagonia - Chile
> Oficina: +56-9-94022038
> Skype: raquel.london
>
>
> On Tue, Oct 18, 2016 at 7:43 AM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
> wrote:
>
>> Dear Raquel,
>>
>> Very good troubleshooting Raquel.
>>
>> % check if duplicate channel label
>>             % --------------------------------
>>             if isfield(EEG.chanlocs, 'labels')
>>                 if length( { EEG.chanlocs.labels } ) > length( unique({ EEG.chanlocs.labels } ) )
>>                     disp('Warning: some channels have the same label');
>>                 end;
>>             end;
>>
>> This indeed means something is wrong with your data. Let's find it out.
>> Try this, and paste what you get on the command line.
>>
>> {EEG.chanlocs.labels}'
>>
>> What do you get?
>>
>> Makoto
>>
>>
>>
>>
>>
>> On Sat, Oct 1, 2016 at 9:26 AM, Raquel London <
>> raquel at dragondelapatagonia.com> wrote:
>>
>>> Dear eeglabbers,
>>>
>>> With one of my subjects, I encountered the following error message: *Warning:
>>> some channels have the same label*
>>> I did not do anything differently with this subject compared to the
>>> others. I checked the channel labels and they are the same as for other
>>> data sets, and none are repeated.
>>> Scalp topo's don't look strange either.
>>>
>>> I found one similar bug report online, but no solution was reported
>>> there.
>>>
>>> In the EEG.checkset function, I found this segment; however as I
>>> mentioned, there are no repeating labels.
>>>
>>> % check if duplicate channel label
>>>             % --------------------------------
>>>             if isfield(EEG.chanlocs, 'labels')
>>>                 if length( { EEG.chanlocs.labels } ) > length( unique({ EEG.chanlocs.labels } ) )
>>>                     disp('Warning: some channels have the same label');
>>>                 end;
>>>             end;
>>>
>>>
>>> Now, I'm not sure what my next step could be in figuring out what, if
>>> anything, could be wrong. Does anyone have an idea?
>>>
>>> Thanks!
>>> Raquel
>>>
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>>
>>
>>
>> --
>> Makoto Miyakoshi
>> Swartz Center for Computational Neuroscience
>> Institute for Neural Computation, University of California San Diego
>>
>
>


-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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