[Eeglablist] Output values for absolute and relative power

[Ruth Laryea]

 Dear eeglablist,

Can anyone help me acquire scripts/ plugin to generate relative and
absolute power values of some EEG data?

I need to calculate relative alpha power, delta/alpha ratio and paired
channel brain symmetry index (pdBSI) (according to the methods of Finnigan
et al 2007 andSheorajpanday et al 2009).

All I found in eeglablist archives was the script below shared by Makoto in
2015

%%%%%%%%%%%%%%%%%%%
% for your epoched data, channel 2
[spectra,freqs] = spectopo(EEG.data(2,:,:), 0, EEG.srate);

% delta=1-4, theta=4-8, alpha=8-13, beta=13-30, gamma=30-80
deltaIdx = find(freqs>1 & freqs<4);
thetaIdx = find(freqs>4 & freqs<8);
alphaIdx = find(freqs>8 & freqs<13);
betaIdx  = find(freqs>13 & freqs<30);
gammaIdx = find(freqs>30 & freqs<80);

% compute absolute power
deltaPower = mean(10.^(spectra(deltaIdx)/10));
thetaPower = mean(10.^(spectra(thetaIdx)/10));
alphaPower = mean(10.^(spectra(alphaIdx)/10));
betaPower  = mean(10.^(spectra(betaIdx)/10));
gammaPower = mean(10.^(spectra(gammaIdx)/10));
%%%%%%%%%%%%%%%%%


I have very little scripting ability

Thanks in advance

Ruth
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