[Mne_analysis] missing event when importing .edf data

Teon Brooks teon at nyu.edu
Fri Feb 14 15:15:14 EST 2014
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Hi Alan,

Are you currently experiencing any of the masking problems with mne-python?
If so, I could take a look at it and see if that could be resolved.



Best,
--
teon



On Fri, Feb 14, 2014 at 1:49 PM, Alan <leggitta3 at gmail.com> wrote:

> Hi Alexandra,
>
> I've also run into mis-labelled events in the past, and I've found that
> some errors could be resolved by using a "mask" in the mne command line
> tools. Do you have access to the command line tools? If so I would read
> this section of the manual<http://martinos.org/mne/stable/manual/convert.html#behiaadg>,
> on importing from other systems. It sounds like you might need to apply a
> mask of 255, (0xff).
>
> Hope this helps.
>
> -Alan
>
>
> On Thu, Feb 13, 2014 at 12:35 PM, Alexandre Gramfort <
> alexandre.gramfort at telecom-paristech.fr> wrote:
>
>> 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.
>>
>> Best,
>> Alex
>>
>>
>>
>> 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 04.37.28.74.90
>> > Mobile : + 33 06.32.55.78.62
>> > e-mail : acorneyllie at olfac.univ-lyon1.fr
>> >
>> >
>> >
>> >
>> >
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