<html><head><base href="x-msg://43/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear Nikos,<div><br></div><div>yes, you can. For instance to plot alpha power scalp map between 9 and 11 Hz, you may type</div><div><br></div><div><div>figure; [spectrum freqs] = pop_spectopo(EEG, 1, [EEG.xmin EEG.xmax]*1000, 'EEG' , 'percent', 100, 'freq', [6 10 22]);</div><div><div>[tmp minind] = min(abs(freqs-9));</div></div><div><div>[tmp maxind] = min(abs(freqs-11));</div></div><div>alphaPower = mean(spectrum(:, minind:maxind),2);</div><div>figure; topoplot(alphaPower, EEG.chanlocs, 'maplimits', 'maxmin'); cbar;</div><div><br></div><div>Best regards,</div><div><br></div><div>Arno</div><div><br></div><div><div>On Jun 19, 2011, at 7:25 AM, nikos dhmou wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div class="hmmessage" style="font-size: 10pt; font-family: Tahoma; "><div dir="ltr">Hello, I would like to ask how can I extract the alpha band power spectrum only from spectopo. I get a vector of spec of 513 values when I use spectopo for a set of epochs in a condition which represent frequencies up to 250 hz.<div><br></div><div>Thanks,</div><div>nikos</div></div>_______________________________________________<br>Eeglablist page:<span class="Apple-converted-space"> </span><a href="http://sccn.ucsd.edu/eeglab/eeglabmail.html">http://sccn.ucsd.edu/eeglab/eeglabmail.html</a><br>To unsubscribe, send an empty email to<span class="Apple-converted-space"> </span><a href="mailto:eeglablist-unsubscribe@sccn.ucsd.edu">eeglablist-unsubscribe@sccn.ucsd.edu</a><br>For digest mode, send an email with the subject "set digest mime" to<span class="Apple-converted-space"> </span><a href="mailto:eeglablist-request@sccn.ucsd.edu">eeglablist-request@sccn.ucsd.edu</a></div></blockquote></div><br></div></body></html>