<div dir="ltr"><div><div><div><span style="font:14px Arial">Hi all,<br><br>My head model/channel location files (.sfp files) have the order of electrodes like this: </span><br>
<span style="font:14px Arial">FidNz 0 9.071585155 -2.359754454</span><br>
<span style="font:14px Arial">FidT9 -6.711765 0.040402876 -3.251600355</span><br>
<span style="font:14px Arial">FidT10 6.711765 0.040402876 -3.251600355</span><br>
<span style="font:14px Arial">E1 5.787677636 5.520863216 -2.577468644</span><br>
<span style="font:14px Arial">E2 5.291804727 6.709097557 0.307434896</span><br>
<span style="font:14px Arial">E3 <a href="tel:3.864122447" value="+13864122447" target="_blank">3.864122447</a> 7.63424051 <a href="tel:3.067770143" value="+13067770143" target="_blank">3.067770143</a></span><br>
<span style="font:14px Arial">E4 2.868837559 <a href="tel:7.145708546" value="+17145708546" target="_blank">7.145708546</a> 4.989564557</span><br>
<span style="font:14px Arial">E5 1.479340453 5.68662139 <a href="tel:6.812878187" value="+16812878187" target="_blank">6.812878187</a></span><br>
<span style="font:14px Arial">….</span><br>
<span style="font:14px Arial">E127 -3.743504949 6.649204911 -6.530243068</span><br>
<span style="font:14px Arial">E128 -6.118458137 4.523870113 -<a href="tel:4.409174427" value="+14409174427" target="_blank">4.409174427</a></span><br>
<span style="font:14px Arial">Cz 0 0 8.87405</span><br>
<span style="font:14px Arial">The EEG data only have data for E1, E2, …, E128</span> (i.e. 128 data channels)<br>
<span style="font:14px Arial">After loading the channel location file, I mark FidNz, FidT9, FidT10, and Cz as non-data channel.</span><br>
<span style="font:14px Arial">Seems like the pop_chanedit() can match
the channel with its location correctly regardless there are three
fiducial electrodes at the top and Cz at the bottom in the channel
location file</span><br>
<span style="font:14px Arial"></span><br>
<span style="font:14px Arial">However, if I mess up the channel location file by changing it to (notice E1 has been moved to after E4):</span><br>
<span style="font:14px Arial">FidNz 0 9.071585155 -2.359754454</span><br>
<span style="font:14px Arial">FidT9 -6.711765 0.040402876 -3.251600355</span><br>
<span style="font:14px Arial">FidT10 6.711765 0.040402876 -3.251600355</span><br>
<span style="font:14px Arial">E2 5.291804727 6.709097557 0.307434896</span><br>
<span style="font:14px Arial">E3 <a href="tel:3.864122447" value="+13864122447" target="_blank">3.864122447</a> 7.63424051 <a href="tel:3.067770143" value="+13067770143" target="_blank">3.067770143</a></span><br>
<span style="font:14px Arial">E4 2.868837559 <a href="tel:7.145708546" value="+17145708546" target="_blank">7.145708546</a> 4.989564557</span><br>
<span style="font:14px Arial">E1 5.787677636 5.520863216 -2.577468644</span><br>
<span style="font:14px Arial">E5 1.479340453 5.68662139 <a href="tel:6.812878187" value="+16812878187" target="_blank">6.812878187</a></span><br>
<span style="font:14px Arial">….</span><br>
<span style="font:14px Arial">E127 -3.743504949 6.649204911 -6.530243068</span><br>
<span style="font:14px Arial">E128 -6.118458137 4.523870113 -<a href="tel:4.409174427" value="+14409174427" target="_blank">4.409174427</a></span><br>
<span style="font:14px Arial">Cz 0 0 8.87405</span><br>
<span style="font:14px Arial">EEGLAB would then mark the electrodes in the order of E2, E3, E4, E1, E5,…E128 instead of E1, E2, E3, E4, E5,…E128</span><br>
<span style="font:14px Arial"></span><br></div>I just want to make sure <span style="font:14px Arial">pop_chanedit()
can indeed match things correctly with my normal sfp files (not being
messed like in my example). Does anyone know anything about the details?<br>
<br></span></div><span style="font:14px Arial">Thank you!<br></span></div><span style="font:14px Arial">Jerry</span><div><div dir="ltr"><div><span style="font-family:times new roman,serif">--<br>Jian Zhu, M.A.<br>Brain and Cognitive Sciences<br>
Department of Psychology<br>Southern Illinois University Carbondale<br></span></div><span style="font-family:times new roman,serif">Web: <a href="http://zhupsy.com" target="_blank">http://zhupsy.com</a><br></span><div><span style="font-family:times new roman,serif"><br>
We have two halves in the brain: left and right. Nothing is right in the left. Nothing is left in the right.</span></div></div></div>
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