[Eeglablist] Please help on basic usage of erpimage

[Allan Campopiano]

Hi Jaime,

This approach might get you close. Suppose you want an ERP image for
channel index 18.

trialdat=squeeze(double(EEG.data(18,:,:)))';

subplot(2,1,1)

x=EEG.times;

y=1:EEG.trials;

surf(x,y,trialdat,'linestyle','none','facecolor','interp'); axis tight;
view(0,90);

subplot(2,1,2)

plot(x,mean(trialdat)); axis tight; grid on;


Sincerely,



*Allan Campopiano* | Electrophysiology Technician-Analyst
Laboratory of Cognitive and Affective Neuroscience
Brock University | Psychology Department | 500 Glenridge Ave.
St. Catharines, ON Canada L2S 3A1
*T* 905-688-5550 x3451 *F *905-688-6922

On Thu, Jul 9, 2015 at 7:09 PM, Jaime Heiss <jaime.heiss at sri.com> wrote:

>  Hello.
>
> Where can I find basic examples on how to plot an ERP from a data Matrix
> using erpimage function from within a script (without user input)?
>
> The matrix has 12000 points in each row (1 trial = 1 row). SR is 2000Hz
> and I need to plot from 2000 to 4500 ms. (each row is 6s of data).
>
> I need to produce the plot below without calling the user interface.
>
> See https://dl.dropboxusercontent.com/u/1803710/erp.jpg
>
>
>
> I have read the help and FAQ and can’t get it right. Sorry.
>
>
>
> Thanks.
>
>
>
>
>
> Jaime Heiss, PhD.
>
> Research Scientist
>
> SRI International
>
>
>
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