<html><body bgcolor="#FFFFFF"><div>Dear Marine,</div><div><br></div><div>When you use newtimef in this way to compare conditions, the function recomputes a common baseline between the two conditions (you can disable that feature if you want). This explains the difference you observe.</div><div><br></div><div>Best,</div><div><br></div><div>Arno<br><font class="Apple-style-span" color="#0023A3"><font class="Apple-style-span" color="#000000"><br></font></font></div><blockquote type="cite"><div><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Marine Vernet</b> <span dir="ltr"><<a href="mailto:mvernet@bidmc.harvard.edu"><a href="mailto:mvernet@bidmc.harvard.edu">mvernet@bidmc.harvard.edu</a></a>></span><br>
Date: Sun, Jul 3, 2011 at 3:16 PM<br>Subject: [Eeglablist] newtimef question<br>To: <a href="mailto:eeglablist@sccn.ucsd.edu"><a href="mailto:eeglablist@sccn.ucsd.edu">eeglablist@sccn.ucsd.edu</a></a><br><br><br>Dear all,<br><br>Using the newtimef function to compare different datasets, I realized that the results of one dataset were not constant when compared with various datasets.<br>
<br>For example, I obtained different plots (and different values within the output variable) for <b>dataset1</b> in the three cases below:<br>
<br> <b>erps1=newtimef( {dataset1 dataset2}</b>, 1160, [-200 599], 1450, 0, 'topovec', 27, 'elocs', dataset1.chanlocs, 'chaninfo', dataset1.chaninfo,...<br> 'baseline',[-200 0], 'plotphase', 'off', 'padratio', 1,'freqs',[8 50],...<br>
'erspmax',3,'itcmax',1,'erplim',[-20 20],'itcavglim',[0 0.6],'speclim',[-15 5],'erspmarglim',[-5 6],... <br> 'alpha', 0.05);<br> <br> <b>erps2=newtimef( {dataset1 dataset3}</b>, 1160, [-200 599], 1450, 0,
'topovec', 27, 'elocs', dataset1.chanlocs, 'chaninfo',
dataset1.chaninfo,...<br>
'baseline',[-200 0], 'plotphase', 'off', 'padratio',
1,'freqs',[8 50],...<br>
'erspmax',3,'itcmax',1,'erplim',[-20 20],'itcavglim',[0
0.6],'speclim',[-15 5],'erspmarglim',[-5 6],... <br>
'alpha', 0.05);<br><br> <b>erps3=newtimef(dataset1</b>, 1160, [-200 599], 1450, 0,
'topovec', 27, 'elocs', dataset1.chanlocs, 'chaninfo',
dataset1.chaninfo,...<br>
'baseline',[-200 0], 'plotphase', 'off', 'padratio',
1,'freqs',[8 50],...<br>
'erspmax',3,'itcmax',1,'erplim',[-20 20],'itcavglim',[0
0.6],'speclim',[-15 5],'erspmarglim',[-5 6],... <br>
'alpha', 0.05);<br><br>I there any reason for that?<br><br>Thanks in advance for your help,<br><br>Best regards,<br><br>Marine<br><font color="#888888">
<br>
<br><br clear="all"><br>-- <br>Marine Vernet, PhD<br><br>Berenson-Allen Center for Noninvasive Brain
Stimulation<br>Beth Israel Deaconess Medical Center, Harvard Medical
School<br><br><a href="mailto:mvernet@bidmc.harvard.edu" target="_blank"><a href="mailto:mvernet@bidmc.harvard.edu">mvernet@bidmc.harvard.edu</a></a><br><br>
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