[Eeglablist] Selecting epochs based on multiple markers

[Stephen Politzer-Ahles]

There are at least two ways (and probably more that I don't know of) to do
this. One is to add ERPLAB, which has tools for this kind of boolean epoch
selection. Another is to write some MATLAB code to rewrite your markers.
e.g., you can use a loop to iterate through each event, and e.g. if marker
1 is followed by marker 2 you rewrite it as '12' (or something like that.
Then you use pop_epoch and only select the markers that indicate epochs
with correct responses (12s, 22s, whatever).


---
Stephen Politzer-Ahles
The Hong Kong Polytechnic University
Department of Chinese and Bilingual Studies
http://www.mypolyuweb.hk/~sjpolit/
<http://www.nyu.edu/projects/politzer-ahles/>

On Wed, Apr 4, 2018 at 7:44 AM, Tzeng, Tony H. <ttzeng at lsuhsc.edu> wrote:

> Hi all,
>
>
> Is there a way to select epochs based on multiple markers? Ie, I'm trying
> to select trials  if they have both marker 1 and 2, which would be a
> correct response. The pop_epoch  seems to be an 'or' function for the
> values input (or at least, I'm getting an different number of epochs than
> the expected)?
>
>
> Any advice would be greatly appreciated! Apologies if this is a basic
> question-I'm a beginner with EEGLab, and I didn't see this answered in the
> list in the last few years or in the tutorial.
>
>
> Thanks for your patience!
>
>
> Best,
>
> Tony Tzeng
>
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