<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div style="margin: 0px; font-size: 12px; ">Hi Dwight,</div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; ">I'll take a look into this. Meanwhile please try the following:</div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; ">i) Using Bin Operations on your ERPset, create a new one (*) as follows (at bin operations GUI check "Create new ERPset (independent transformations"):</div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; "><font face="Courier New">LH = [1 3 5]</font></div><div style="margin: 0px; font-size: 12px; "><font face="Courier New">RH = [2 4 6]</font></div><div style="margin: 0px; font-size: 12px; "><font face="Courier New">nb1 = 0.5*b1@RH + 0.5*b2@LH label average contra</font></div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><font face="Courier New">nb2 = 0.5*b1@LH + 0.5*b2@RH label average ipsi</font></div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; ">ii) Once you create this 2-bin ERPset, go back to bin operations again and add a third bin as follows (at bin operations GUI check "Modify existing ERPset (recursive updating"):</div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; "><font face="Courier New">b3 = b1-b2 label average contra minus ipsi</font></div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; ">(*) The reason for creating a new ERPset is that the new one has less channels than the current one, so its data matrix would no longer fit on it.</div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; ">I hope this helps,</div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; ">Javier</div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; min-height: 14px; "><br></div><div style="margin: 0px; font-size: 12px; ">PS: You may also use <a href="mailto:erplab@ucdavis.edu">erplab@ucdavis.edu</a> for sending questions/feedback</div></div><div><br></div><div><br></div><div><br><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><blockquote type="cite">
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<span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>From:
</b></span><span style="font-family:'Helvetica'; font-size:medium;">Dwight Peterson <<a href="mailto:dwight.peterson23@gmail.com">dwight.peterson23@gmail.com</a>><br>
</span></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;">
<span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>Subject:
</b></span><span style="font-family:'Helvetica'; font-size:medium;"><b>[Eeglablist] CDA plotting and difference waves</b><br>
</span></div>
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<span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>Date:
</b></span><span style="font-family:'Helvetica'; font-size:medium;">February 9, 2013 7:27:59 PM PST<br>
</span></div>
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<span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>To:
</b></span><span style="font-family:'Helvetica'; font-size:medium;"><<a href="mailto:eeglablist@sccn.ucsd.edu">eeglablist@sccn.ucsd.edu</a>><br>
</span></div>
<br>
<br>
Hello everyone,
<div><br>
</div>
<div> I am using ERPLAB to try and plot the CDA (difference waveform) from my Contralateral and Ipsilateral waveforms. In my Bin Operations relative to my erpset, I have used the following basic formula (modified to my specific bins and channels,
etc): (as recommended by Dr. Luck in the ERP tutorial)</div>
<div><br>
</div>
<div>However, when I go to plot the difference waveforms for my respective electrode pairs and conditions (i.e., bins), I get a plot with axes for each of my electrode pairs, but no difference waveform (or waveform at all for that matter). Is there something
that I perhaps need to install/update to insure proper plotting, etc.? I've also noticed this when trying to plot a contra and ipsi waveform for an electrode pair, wherein the only wave form that will come up when I plot 1:2, is 2 (but not 1). Any thoughts
as to why this might be? Thanks!!! </div>
<div><br>
</div>
<div><br>
</div>
<div><span class="Apple-style-span" style="border-collapse: collapse; font-family: 'Lucida Grande', Verdana, Lucida, Helvetica, Arial, sans-serif; font-size: 12px; ">
<div style="margin: 0px 0px 0.75em; line-height: 1.5em; ">LH = [1 3 5]</div>
<div style="margin: 0px 0px 0.75em; line-height: 1.5em; ">RH = [2 4 6]</div>
<div style="margin: 0px 0px 0.75em; line-height: 1.5em; ">b1 = (b2@LH + b1@RH)/2 label Average Contra</div>
<div style="margin: 0px 0px 0.75em; line-height: 1.5em; ">b2 = (b1@LH + b2@RH/2 label Average Ipsi</div>
<div style="margin: 0px 0px 0.75em; line-height: 1.5em; ">b3 = ((b2@LH + b1@RH)/2) – ((b1@LH + b2@RH)/2) label Average Contra Minus Ipsi</div>
</span>
<div><br>
</div>
<div>--Dwight--</div>
<div><br>
</div>
-- <br>
Dwight J. Peterson, M.A.<br>
Graduate Assistant<br>
Cognitive and Brain Sciences<br>
Department of Psychology/296
<div>Memory and Brain Laboratory<br>
University of Nevada, Reno<br>
Reno, NV 89557<br>
Cellular: 319-231-8596</div>
<div>Laboratory: 775-682-8667</div></div></blockquote></div></div></div></blockquote></div><br><br><div apple-content-edited="true">
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