[Eeglablist] About help in loading EDF file and plotting channel spectra.

[Arnaud Delorme]

Dear Nabaraj,

this red warning appears almost systematically. EEGLAB uses by default functions from BIOSIG to import EDF data.
I think the red warning appears because Alois Schoegl, the author of BIOSIG, has detected a small inconsistency in the way most software save EDF/BDF data and he likes to report it to users. Maybe he can elaborate on that. I would not worry about it too much.
Best,

Arno

On Jun 13, 2012, at 5:42 PM, nabaraj dahal wrote:

> Dear eeglablist members,
> 
> I had a following warning on loading the edf file from BIOSIG tool.
> 
> WARNING SOPEN(EDF): Physical Max/Min values of EDF data are not necessarily defining the dynamic range.
>    Hence, OVERFLOWDETECTION might not work correctly. 
> 
> I was just wondering how would I be able to make the MAx/Min  value within the range.
> Also, while plotting the channel scroll data, I am getting the blank screen.
> I am able to see the channel plot only after doing a baseline removal.
> But this introduces drifts and swings in the plot at different interval and the plot looks very different from the original pattern.
> Therfore, I want to use baseline removal only after rejecting the chunks of spikes and drifts introduced in the record while recording.
> 
> I would be very grateful if someone could suggest me how to proceed in such case.
> 
> Best Regards,
> Nabaraj Dahal.
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