[Eeglablist] EEGLAB file export into EDF and Brain Vision format without channel position

[Arnaud Delorme]

Dear Ke,

I do not think that channels location can be exported in EDF files. They can be exported in .vhdr files, but the bva-io plugin does not allow that (it is a limitation of the plugin). Note that this mostly matters if you have scanned electrode positions.

Arno

> On Sep 30, 2024, at 19:53, liao ke via eeglablist <eeglablist at sccn.ucsd.edu> wrote:
> 
> Dear EEGLAB users,
> 
> I have a question about exporting EEGLAB *.set file into *.edf and *.vhdr
> format, in which the EEG channel position information is missing in output
> files.
> 
> When export to *.edf file, the warning is:
> Warning SOPEN: HDR.PhysDimCode of the following channel(s) is(are) not
> defined:
> 1 2 3 4 5 6 7 8 9 10 11 ...  (for all 128 EEG channels).
> 
> When export to *.vhdr file, the warning is:
> Warning: channel location were not exported to BVA (it will use default
>         10-20 BESA locations based on channel names)
> 
> I am using the  bva-io and Biosig plugins in EEGLAB. Does anyone know how
> to export the EEG channel position into either of the two format files? or
> know any software that can add channel position information after the files
> are created? Any open source software is preferred.
> 
> 
> Thank you for your help!
> 
> Best,
> Ke
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