[Mne_analysis] missing event when importing .edf data

acorneyllie at olfac.univ-lyon1.fr acorneyllie at olfac.univ-lyon1.fr
Thu Feb 13 11:28:49 EST 2014
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Hi mne users!

I'm trying to import epocked data from EEGlab (already preprocessed) in
mne. I used the .edf conversion and the read_raw_edf function to transform
.set and .fdt to fif format.
The data import appears good to me (channels  and samples are all here and
correct) and events are syncronised.
However, the number of event readen from raw data is less than the real
(using events = mne.find_events(raw, stim_channel='STI 014'))

Moreover, the event id are '255' instead of 1,2,3 and 4 (the triggers
values). I changed it manualy and then realized that all the event
associated to trigger '1' are missing.

I tried on EEGlab to re-import the .edf file to look if all of the
triggers are well exported, and it seems to be good.

So, what could be the source of this miss of event readen from raw data ?
Is there a way to add the missing events properly ?
And finaly, is there a simplier process to import epocked data from EEGlab ?

Thanks for your help,
Alexandra Corneyllie
Equipe Cognition Auditive et Psychoacoustique
CNRS UMR 5292 - INSERM U1028
Centre de Recherche en Neurosciences de Lyon
Fixe : + 33
Mobile : + 33
e-mail : acorneyllie at olfac.univ-lyon1.fr

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