<html><head><base href="x-msg://4613/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear Jens,<div><br></div><div>this is currently not possible from the graphic interface (although see the end of my message).</div><div>You may plot the channels you want to average (in the same plot) for example P1, P2 and Pz</div><div><br></div><div>[STUDY erpdata specfreqs] = std_erpplot(STUDY, ALLEEG, 'channels', {'Pz' 'P1' 'P2'})<br><br></div><div>Then you can average them for each condition. If you have 3 conditions and 13 subjects.</div><div><br></div><div><div>erpdata = </div><div><br></div><div> [750x3x13 double]</div><div> [750x3x13 double]</div><div> [750x3x13 double]</div></div><div><br></div><div><div>erpdata{1} = squeeze(mean(erpdata{1},2));<br>erpdata{2} = squeeze(mean(erpdata{2},2));<br>erpdata{3} = squeeze(mean(erpdata{3},2));</div></div><div><br></div><div><div>erpdata = </div><div><br></div><div> [750x13 double]</div><div> [750x13 double]</div><div> [750x13 double]</div></div><div><br></div><div>std_plotcurve(erptimes, erpdata);</div><div><br></div><div>In fact, after writing that email, I realized it was not too hard to add to EEGLAB and several people have been asking for that feature. Look for the "average selected channels" checkbox in the next release of EEGLAB (next month).</div><div><br></div><div>Best wishes,</div><div><br></div><div>Arno</div><div><br><div><div>On May 18, 2012, at 10:26 AM, Bernhardsson Jens wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div lang="SV" link="blue" vlink="purple"><div class="WordSection1" style="page: WordSection1; "><div style="margin-top: 0cm; margin-right: 0cm; margin-left: 0cm; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span lang="EN-US">Hello again<o:p></o:p></span></div><div style="margin-top: 0cm; margin-right: 0cm; margin-left: 0cm; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span lang="EN-US"><o:p> </o:p></span></div><div style="margin-top: 0cm; margin-right: 0cm; margin-left: 0cm; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span lang="EN-US">How do I plot an average for a couple of channels in a study?<o:p></o:p></span></div><div style="margin-top: 0cm; margin-right: 0cm; margin-left: 0cm; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span lang="EN-US"><o:p> </o:p></span></div><div style="margin-top: 0cm; margin-right: 0cm; margin-left: 0cm; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span lang="EN-US"><o:p> </o:p></span></div><div style="margin-top: 0cm; margin-right: 0cm; margin-left: 0cm; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span lang="EN-US">Best<o:p></o:p></span></div><div style="margin-top: 0cm; margin-right: 0cm; margin-left: 0cm; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span lang="EN-US">Jens<o:p></o:p></span></div><div style="margin-top: 0cm; margin-right: 0cm; margin-left: 0cm; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span lang="EN-US"><o:p> </o:p></span></div><div style="margin-top: 0cm; margin-right: 0cm; margin-left: 0cm; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span lang="EN-US"><o:p> </o:p></span></div></div>_______________________________________________<br>Eeglablist page:<span class="Apple-converted-space"> </span><a href="http://sccn.ucsd.edu/eeglab/eeglabmail.html" style="color: blue; text-decoration: underline; ">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" style="color: blue; text-decoration: underline; ">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" style="color: blue; text-decoration: underline; ">eeglablist-request@sccn.ucsd.edu</a></div></blockquote></div><br></div></body></html>