[Mne_analysis] missing event when importing .edf data

Alexandre Gramfort alexandre.gramfort at telecom-paristech.fr
Thu Feb 13 15:35:42 EST 2014
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hi Alexandra,

I have no experience with what you're trying to do.

When you say "epocked" you mean multiple trials ? evoked / averaged data?

read_raw_edf is meant to read continuous raw data.

Also you can have a look at the channel STI014 to see what can go wrong.

You may want to paste the commands you typed to do what you want. It
might clarify things on my side.


On Thu, Feb 13, 2014 at 5:28 PM,  <acorneyllie at olfac.univ-lyon1.fr> wrote:
> 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
> number.
> (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,
> Best.
> --
> 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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