[Eeglablist] how to get mean ersp data

[Arnaud Delorme]

Dear Jung,

the ERSP data is stored in each cluster of the STUDY under 
STUDY.cluster(x). Each function also return this information. For 
instance, std_erspplot will return 4 arguments, the first one is the 
STUDY, the second is the ERSP for all conditions, the third one are the 
time latencies and the 4th the different frequencies.

The ERSP is a cell array. For instance, if you have 16 subjects and 2 
conditions, it will be

ERSP =
    [200x100x16]
    [200x100x16]

The first array contains data for the first condition and the second one 
data for the second condition. You must average these before plotting them.

erspcond1 = mean(ERSP{1},3);
erspcond2 = mean(ERSP{2},3);

then you may use either imagesc, logimagesc or tftopo to plot these arrays.
Best,

Arno  

Jung Ki-Young wrote:
>
> Dear all
>
> I'd like to get mean ERSP of each component cluster during cluster 
> analysis.
>
> I assume std_plottf and std_erspplot may use mean ERSP data from 
> different components/different datasets within the same cluster for 
> plotting the data.
>
> But I don't figure out how to get mean ersp data, mean erp data, and 
> other mean data from the STUDY analysis.
>
> Would you please give some comments or advices for this?
>
> Thank you in advance.
>
>  
>
> Jung
>
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