[Eeglablist] Dividing datasets into halves

[Magda Gawłowska]

Dear Arno,

Thank you for the tip - to be honest, I'm doing it like that from the very
begining, but the problem lays in determining the number of epochs I want
to select, eg.:

When I use command form GUI i have to type in the range of epochs for the
1st half of dataset and for the 2nd half od dataset - like below - form 1st
to 48th, - which is the 1st half of my dataset (in that case I have 98
epochs in total)

EEG = pop_select( EEG,'trial',[1:48] );

I wanted to script this step for multiple subjects and every subect has
different number of epochs in dataset - so obviously I cannot leave it as
[1:48].

I tried the easiest possible way to solve it, by tiping in [1:end/2] for
the 1st half and [end/2:end] for the 2nd - but it doesn't work... Do you
maybe have any other idea how can I specify the range of epochs? :):)

Thank you once again!

Magda


2013/11/20 Arnaud Delorme <arno at ucsd.edu>

> Dear Magda,
>
> after you use the EEGLAB graphic interface to divide your dataset, look at
> the EEGLAB history using the "eegh" command. The last line will contain the
> command you will need to perform the same operation in a script.
>
> Best,
>
> Arno
>
> On Nov 11, 2013, at 4:42 AM, Magda Gawłowska <mag.gawlowska at gmail.com>
> wrote:
>
> > Dear EEGlab Users,
> >
> > I'm quite new to Matlab scripting as I was previously using only GUI
> version of EEGLab. I was wondering if you can help me with scripting
> problem. I suppose it's not very complicated, but I have a hard time with
> finding the solution.
> >
> > So, here we go - I  have segmented datasets with different number of
> events in each one. I wanted to divide sets into halves and save them as
> the 1st and the 2nd half. Up until now I've been doing it by simply using:
> Eidt -> select data -> epoch range, but it takes ages to do it manually. Is
> there any way to do it using script, so that Matlab checks number of events
> in every dataset at first, and then takes the 1st and 2nd half separately?
> >
> > I would be grateful for any help!
> >
> > Greetings,
> >
> >
> > Magda
> >
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-- 
Pozdrawiam!

Magda Gawłowska
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