<div dir="ltr"><div>Dear Jason,<br><br>You band-pass filter the data from 8 to 13 Hz and plot channel scalp topography. If you want to show scalp topography of specific band of power spectrum density, I'm afraid you need to code a little bit.<br><br>%%%%%%%%%%%%%%%%%%%<br>% for your epoched data, channel 2<br>[spectra,freqs] = spectopo(EEG.data(2,:,:), 0, EEG.srate);<br><br>% delta=1-4, theta=4-8, alpha=8-13, beta=13-30, gamma=30-80<br>deltaIdx = find(freqs>1 & freqs<4);<br>thetaIdx = find(freqs>4 & freqs<8);<br>alphaIdx = find(freqs>8 & freqs<13);<br>betaIdx = find(freqs>13 & freqs<30);<br>gammaIdx = find(freqs>30 & freqs<80);<br><br>% compute absolute power<br>deltaPower = mean(10.^(spectra(deltaIdx)/10));<br>thetaPower = mean(10.^(spectra(thetaIdx)/10));<br>alphaPower = mean(10.^(spectra(alphaIdx)/10));<br>betaPower = mean(10.^(spectra(betaIdx)/10));<br>gammaPower = mean(10.^(spectra(gammaIdx)/10));<br>%%%%%%%%%%%%%%%%%<br><br>...and use topoplot() function.</div><div><br></div><div>Alternatively, you maybe able to find a solution for you in Simon's NBT.</div><div><a href="https://www.nbtwiki.net/">https://www.nbtwiki.net/</a></div><div><br>Makoto<br><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jan 8, 2016 at 11:26 PM, jason roger <span dir="ltr"><<a href="mailto:jasonroger8@gmail.com" target="_blank">jasonroger8@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><p dir="ltr">Dear all,</p>
<p dir="ltr">I'm wondering about the good way in EEGLAB to plot scalp map based on the associated frequencies, e.g., [8 13]. My major aim is plotting not based on single value (mean), but instead, it is based on the band range.</p>
<p dir="ltr">Any help would be highly appreciated. </p><span class=""><font color="#888888">
<p dir="ltr">Jason</p>
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