[Eeglablist] How can I quantify data in EEGlab ?

[Stephen Politzer-Ahles]

Hello Imtiaz,

The data are in the field EEG.data; for instance, if you have epoched data
for one participant then this field is a 3-dimensional matrix (channels x
samples x trials). You can work directly with the raw numbers any way you
see fit (for example, choosing a time window and a subset of trials to
average over if you want to statistically analyze mean amplitudes),
directly in MATLAB or after exporting them into e.g. Excel or something
like that; you can check the book by Luck (2005/2012) for a more detailed
discussion and recommendations about how to quantify ERP waveforms.

If you're working with multi-subject STUDY data and/or spectral data as
well as spatiotemporal data, the underlying logic is similar---you can
extract the numbers from the appropriate field of the MATLAB structure and
manipulate them however you need.

I believe the ERPLAB toolbox and similar add-ons also provide a lot of
built-in functions for data quantification, which you could explore.

Best,
Steve



Stephen Politzer-Ahles
New York University, Abu Dhabi
Neuroscience of Language Lab
http://www.nyu.edu/projects/politzer-ahles/

On Mon, Jun 29, 2015 at 3:11 PM, Imtiaz SA <imtiaz1877 at gmail.com> wrote:

> Hello everyone,
>
> I am new to eeglab and need to know if I can quantify eeg data. I can see
> it generates scalp distribution maps and spectra but can I get actual
> number data for those graphs? If yes, how?
>
> --
>
>
>
> Thanks and regards,
>
>
>
> *Imtiaz*
>
> PhD Student
>
> Department of Computer Science
>
> The University of Texas at San Antonio
>
> _______________________________________________
> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
> To unsubscribe, send an empty email to
> eeglablist-unsubscribe at sccn.ucsd.edu
> For digest mode, send an email with the subject "set digest mime" to
> eeglablist-request at sccn.ucsd.edu
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20150630/58168f4c/attachment.html>