[Eeglablist] Questions about epochs and scripts

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Sat Jan 21 20:10:50 PST 2017

Dear Luigi,

I know you have already addressed the problem, but for record I can also
recommend to use James Desjardin's vised() plugin. You can install this
plugin from the EEGLAB plugin manager, with which you can create the very
first event during browing the continuous data (use keyboard shortcut ctrl
+ click or something to add event interactively.)

>From UA49 to Newark,


On Thu, Jan 12, 2017 at 9:54 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>

> Dear Luigi,
> Yeah it's annoying that if  you don't have any event then you can't create
> event information. It's a a falut of the design, so you can file it as a
> bug, if you can nicely volunteer.
> https://sccn.ucsd.edu/bugzilla/enter_bug.cgi
> There are a few ways to solve this: 1) Create a dummy event structure by
> coding just to make the event edit GUI work, 2) Generate event info with
> Excel and import it to EEGLAB. Probably 2) is more proper and supported way
> to go.  You can do this from EEGLAB main GUI, 'File' - 'Import event info'.
> Dear Stephen,
> > another was to use a built-in EEGLAB function to split up the signal
> into equal-length segments.
> Hmm that could be eeg_regepoh(), but it's not partucularly useful for this
> purpose. In addition, when I recently used it, it did not work well when I
> specify 10 s epoch for example... or maybe I did not understand how to use
> it even though I read the help file 5 times i.e. probably some kind of bug
> is there and segmenting the data into 1-s is the only confirmed good
> behavior. I don't know what was wrong.
> From Lufthansa455 to Frankfurt,
> Makoto
> On Wed, Dec 28, 2016 at 3:07 AM, Luigi Pavone <gi19gi82 at gmail.com> wrote:
>> Hello everybody,
>> I'm new in eeglab, I would like to ask you some questions.
>> I have a continuos 17 channels EEG signal.
>> I would like to extract epochs from that signal. Each epoch has length of
>> 500 msec and starts 100 msec before the stimulus and last 400 msec after
>> the stimulus.
>> I have in total about 180 of such epochs.
>> I've tried to extract epochs from EEG using "Extract Epochs" function
>> from "Tools" menù, but eeglab ask me to define events first.
>> How can i define events and then epochs in such way?
>> I've tried to read from tutorials, but i didn't find (at least until now)
>> something that explain how to do this.
>> Thank you so much in advance.
>> Best regards,
>> Luigi Pavone
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> --
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego

Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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