[Eeglablist] importing data arrays into EEGLAB v6.03b

[arno delorme]

Dear Antanas,

this type of data is not ideal for EEGLAB since the type of processing  
you will be able to do is limited. if you really want to import this  
data into EEGLAB to process it within a study, you should create one  
dataset per subject and per condition. For a given subject and  
condition, first type in

data = CONDITION1(:,:,subject)';
then import the "data" array using the menu "File > Import data > From  
ASCII/float file or Matlab array". Save the file and repeat for each  
subject and condition.

You may then create a STUDY. However, I am not 100% sure that all the  
ERP statistics will work since EEGLAB will think that you are using  
continuous data (only 1 trial per subject). If this is the case, you  
may trick the program by faking the presence of two trials.

data = CONDITION1(:,:,subject)';
data(:,:,2) = data;
Then import as before.

This will not change the ERP and then for sure the ERP statistics will  
work.

Best,

Arno

On 24 oct. 08, at 19:42, Spokas Antanas wrote:

> Hi All,
>
> I am new to EEGLAB and would like to ask smb's assistance with  
> importing of EEG evoked potential experiment data into EEGLAB. My  
> data is already preprocessed and averaged over trials. It is saved  
> in .mat files as 2 seperate 3D arrays for 2 conditions where  
> CONDITION1(potential,channel,subject), then a seperate 1D array for  
> time points of potentials TIME(1,timepoints) and .m file with  
> channels' coordinates. I could not find the answer in help how to  
> import this kind of data format. Please help. Thanks a lot.
>
> Antanas
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