[Eeglablist] putting ERP data into matrix

[kazuyo tanji]

Hi, all

I am trying to do ERS analysis using EEGLAB. I need to 
subtract ERP from rawdata epoch by epoch. Can anyone 
please tell me how I can do this? 

If I am right rawdata can be obtained by EEG.data(:,:,n) 
for epoch n, but I am at a loss how I can put calculated 
ERP data into matlab variables. 

Thanks in advance,

Kazu