[Eeglablist] how to create new data sets based on the number of event

[Stephen Politzer-Ahles]

Hi Min,

There should be lots of ways to do that*. *If you want to analyze epochs,
you can use pop_selectevent() and give it the event indices 2:97 to pull
out the epochs surrounding those events. Or you could rewrite the event
values of EEG.event(2:97).eventtype, and then use those types to pull out
epochs using pop_epoch(). If you want the continuous data from event 2 to
97, I think there are several ways to do it; one would be to find the
latency of event 97 relative to event 2 (i.e., it is *n* milliseconds later
than event 2), and pull out a single epoch of length *n* time-locked to
event 2.



Stephen Politzer-Ahles
New York University, Abu Dhabi
Psychology Department
http://www.nyu.edu/projects/politzer-ahles/


On Sat, Aug 31, 2013 at 2:01 AM, Min Sheng <Min.Sheng at utsouthwestern.edu>wrote:

>  Dear all;
>
> I am processing visual ERP data, I have 768 events which under 2 different
> conditions( room air and hyperoxia). I did not mark these two conditions
> when record EEG data but I know the time period of each conditons.
>
> Such as from event 2 to  event 97 was under room air. So can I extract
> this period and create a new dataset to do further analysis? I want to
> compare ERP under these two conditions.
>
> Thanks
>
> Min Sheng
>
>
>
> ------------------------------
>
> UT Southwestern Medical Center
> The future of medicine, today.
>
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