Dear Everyone,
I hope you are all well. Thank you for sharing the dataset once again. I downloaded both resting state and the task data. Unfortunately, once I load the EDFs into my EEGLAB (Matlab), it shows some sinusoids and I do not have any EEG signal.
Unfortuantely, I could not find a way to paste my screenshots to this discussion forum. May I please ask if any of the users had difficulties loading the files?
Have a great day,
Sincerely,
Artyom
Created by Artyom Zinchenko Artyom Hi Artyom,
Thanks for your message. What you’re seeing is very likely due to viewing the unprocessed (raw) EEG data. Raw EDF files often look sinusoidal because of slow drifts, line noise, and other artifacts. To see the real EEG activity, you’ll need to apply some basic preprocessing steps after loading the data in EEGLAB.
I recommend starting with:
Bandpass filtering (e.g., 0.5–40 Hz or 1–50 Hz)
Notch/line noise filtering (50 Hz For Iran's line frequency)
Once these filters are applied, the EEG signals should look as expected.
Let me know if you need help with the filtering settings in EEGLAB — happy to help!
Best,
Farshid