<div dir="ltr"><div>Dear James,</div><div><br></div><div>This is from newtimef() line 945. Probably not exactly the same thing you run, but the basic idea of 'commonbase' can be seen. Looks like it's an average of two (or more) baselines.</div><div><br></div><div>Makoto</div><div><br></div><div><div> % recompute power baselines</div><div> % -------------------------</div><div> if ~isnan( g.baseline(1) ) && ~isnan( mbase1(1) ) && isnan(g.powbase(1)) && strcmpi(g.commonbase, 'on')</div><div> disp('Recomputing baseline power: using the grand mean of both conditions ...');</div><div> mbase = (mbase1 + mbase2)/2;</div><div> P1 = P1 + repmat(mbase1(1:size(P1,1))',[1 size(P1,2)]);</div><div> P2 = P2 + repmat(mbase2(1:size(P1,1))',[1 size(P1,2)]);</div><div> P1 = P1 - repmat(mbase (1:size(P1,1))',[1 size(P1,2)]);</div><div> P2 = P2 - repmat(mbase (1:size(P1,1))',[1 size(P1,2)]);</div><div> if ~isnan(g.alpha)</div><div> Pboot1 = Pboot1 + repmat(mbase1(1:size(Pboot1,1))',[1 size(Pboot1,2) size(Pboot1,3)]);</div><div> Pboot2 = Pboot2 + repmat(mbase2(1:size(Pboot1,1))',[1 size(Pboot1,2) size(Pboot1,3)]);</div><div> Pboot1 = Pboot1 - repmat(mbase (1:size(Pboot1,1))',[1 size(Pboot1,2) size(Pboot1,3)]);</div><div> Pboot2 = Pboot2 - repmat(mbase (1:size(Pboot1,1))',[1 size(Pboot1,2) size(Pboot1,3)]);</div><div> end;</div><div> verboseprintf(g.verbose, '\nSubtracting the common power baseline ...\n');</div><div> meanmbase = mbase;</div><div> mbase = { mbase mbase };</div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Sep 2, 2015 at 11:27 AM, James Jones-Rounds <span dir="ltr"><<a href="mailto:jj324@cornell.edu" target="_blank">jj324@cornell.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hello all,<div><br></div><div>We're trying to interpret some STUDY ERSP results. Specifically, one question we have is what time window the "Compute common baseline" uses to compute a baseline, in the GUI pop-up for selecting ERSP Parameters, in the "Edit/Plot Clusters" STUDY menu option.</div><div><br></div><div>Can anyone provide some information about this? The online information I've found (<a href="http://sccn.ucsd.edu/pipermail/eeglablist/2013/006558.html" target="_blank">http://sccn.ucsd.edu/pipermail/eeglablist/2013/006558.html</a> ) seems to suggest that you can only specify an ERSP baseline if you use the command-line version of the functions, and also that's only for the pre-computing step.</div><div><br></div><div>Thanks for your help!</div><span class="HOEnZb"><font color="#888888"><div><br>James<br clear="all"><div><br></div>-- <br><div><div dir="ltr"><div>James Jones-Rounds</div>Laboratory Manager<br>Human Development EEG and Psychophysiology (HEP) Laboratory,<div>Department of Human Development,<br>--------------------------------------------<br>Cornell University | Ithaca, NY<br></div><div><a href="tel:607-255-9883" value="+16072559883" target="_blank">607-255-9883</a></div><div><a href="mailto:eeg@cornell.edu" target="_blank">eeg@cornell.edu</a></div></div></div>
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