[Eeglablist] need help/guidance in epoching dataset in EEGLAB

Tarik S Bel-Bahar tarikbelbahar at gmail.com
Tue Dec 10 08:34:04 PST 2019


Hello, brief notes here: to make events, use the eeglab gui function
Epoching. this will allow you to make epochs around the events of your
choice, and should leave you with a new file with just those epochs. after
succesfully doing so, one can review eegh output for how do it by script.
see also eeglab wiki on epoching, events, and scripting if you havent had a
chance to.




On Tue, Dec 10, 2019, 11:05 AM S Saleem <samsaleem at gmail.com> wrote:

> Thank you so much for your help!
>
> I was able to extract sub-set of 60s using pop_select box, but then I
> manually made the events.txt file, as follows:
> latency type duration
>    1        emo  60
>
> Then I included this event file into dataset using the file-->Import Event
> Info--> from Matlab array or ascii file --> popimport_event() box.
>
> Now I 'm trying to figure out how to make 1-2 s epochs/trials of this
> event. Any guidance, please?
>
> Sameera Saleem
>
>
>
> On Mon, Dec 9, 2019 at 11:37 PM Ramón Martinez <nucleuscub at gmail.com>
> wrote:
>
> > Dear Sameera,
> >  If I understood well your problem, you may want to look at  pop_select
> > (from the EEGLAB GUI:  Edit > Select data ).
> >  Hope this helps,
> > Ramon
> >
> > On Mon, Dec 9, 2019 at 8:22 AM S Saleem <samsaleem at gmail.com> wrote:
> >
> >> Hello all,
> >>
> >> I am new to EEGLAB.
> >> I need to perform ICA on a stimulus-dataset, collected while the subject
> >> watched an emotion-video.
> >> I have done preprocessing.
> >> the dataset is continuous, with 25473 rows of EEG signals recorded from
> >> scalp electrodes, with a sampling rate of 128 Hz, giving a duration of
> 199
> >> seconds.
> >> From this continuous data, I need to extract the last 60 seconds [for
> >> further analysis leading to ICA and classification] and write an
> >> events-file. I need to know how to write this  file.
> >> The tutorial at the link: [
> >> https://sccn.ucsd.edu/wiki/A02:_Importing_Event_Epoch_Info] contains an
> >> events file having labels of Latency, Type, Position/Duration
> >>
> >> Can anyone please guide me on how to fill the above labels?
> >>
> >> Thank you,
> >>
> >> Sameera Saleem
> >> _______________________________________________
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> >
> >
> > --
> > _____________________________________________________
> > Ramon Martinez-Cancino
> > Swartz Center for Computational Neuroscience
> > Institute for Neural Computation, University of California San Diego
> >
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