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

[Spokas Antanas]

Dear Arno,

Thank you for your advice, all looks good in the study, but when I run ICA (as this is the only tool I can use on this study), I get message on matlab: 'Abording, some datasets do not have subject names'. I checked and all of them have number attached, is there something else I don't understand here?

Thanks very much!

Antanas




________________________________
From: arno delorme <arno at ucsd.edu>
To: Spokas Antanas <antanas.spokas at yahoo.co.uk>
Cc: eeglablist at sccn.ucsd.edu
Sent: Sunday, 26 October, 2008 23:15:41
Subject: Re: [Eeglablist] importing data arrays into EEGLAB v6.03b

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


      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20081028/006931e0/attachment.html>