[Eeglablist] Electrodes Values

[Stephen Politzer-Ahles]

Hi Kleber,

The data for a given dataset are in EEG.data, which is a 2- or
3-dimensional matrix (rows are channels, columns are samples; if it's
epoched data, the third dimension is epochs). So the data for the nth
sample are simply EEG.data(:,n) or EEG.data(:,n,:). You can sum those
values using the sum() function in MATLAB.

As for your second question, I'm afraid I haven't quite understood what
you're trying to do.

Best,
Steve


On Thu, May 16, 2013 at 5:15 PM, Kleber de Aguiar <kaguiar at cos.ufrj.br>
wrote:
>
> Hello Everyone in this list,
>
> I would like to know if anyone of you can answer me a doubt about de
reading
> of the values of a group of electrodes in a EEG exam, as I"ll explain
bellow:
>
>
> 1- Spliting the EEG recording in slots of time, that I will call them as
> "samples";
>
> 2- Assuming that "n" electrodes were used in this EEG Recording;
>
> 3 - In every "sample" of the recording, there will have "n" electrodes
values
> corresponding for each electrodes;
>
> MY QUESTIONS:
>
> * How can I sum this electrodes values of the sample in a single value
that
> represents  the total of microvolts oh that "sample"?
>
> * How can I describe the values of "y" samples in a single value that
> represents these "y" sample values?
>
>
> Best regards,
>
> Kleber, a fresh researcher in this field.
>
>
>
> --
> Programa de Engenharia de Sistemas e Computação
> PESC/COPPE/UFRJ
> Visite nossa página web (http://www.cos.ufrj.br)
>         ------***------
> Kleber de Aguiar
> Tecnólogo em Sistemas de Computação
> Mestrando em Engenharia de Sistemas e Computação - PESC/COPPE/UFRJ
> Tutor Presencial CEDERJ/UAB - Curso de Computação UFF
> Twitter: @kleberIAguiar
>
>
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--
Stephen Politzer-Ahles
University of Kansas
Linguistics Department
http://people.ku.edu/~sjpa/
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