[Eeglablist] Segregated EDFs

[Cedric Cannard]

Dear Efthymios,

Not sure why this happens, considering they have the same file length. Did you use the same sampling rate for all of them?
Some possibilities: 
- Computer storage/memory limitations
- recording interruptions
- Software export settings
- Software or firmware glitches during export

I would check that the ANT aEEG unit and any associated software are updated to latest versions, check memory on the recording computer, check settings in software. 

2) you can import them one by one with the import_edf EEGLAB plugin, and with a script merge them into one file. If you want to do that, send me a personal message and I can help. We could potentially add this feature to the plugin. I've seen segmented EDF files before. 

You can also merge them using EDFBrowser (https://urldefense.com/v3/__https://www.teuniz.net/edfbrowser/__;!!Mih3wA!EnS9FjqmjmFn5LyhUAKBNLRyttCKB8SKZ7jjvMYs6ihnV0rcfz4zIP-CpgXcca5q1SfUd0zqvOMu8FhOEFnVw9T_mg$ ) and import the resulting file into EEGLAB with the import_edf or biosig plugins. 

Hope this helps,

Cedric Cannard



On Tuesday, February 6th, 2024 at 6:57 AM, Efthymios Papatzikis via eeglablist <eeglablist at sccn.ucsd.edu> wrote:

> Dear List,
> 
> I am working with the ANT aEEG unit in an NICU and unfortunately when I export the files as EDFs sometimes (for not known reason - all files correspond to the same protocol length) I receive after the export 2 or 3 segregated files instead of one, continuous.
> 
> 1. Any chance you know why this happening?
> 2. Is there a way to connect properly the segregated EDFs into one using EEGLab? (Or any other way if known without loosing valuable data?)
> 
> Thank you all in advance for your collective wisdom!
> 
> Best,
> Efthymios Papatzikis
> Associate professor of Infant Brain Development
> Oslo Metropolitan University
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