<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Hi Bill. I would recommend using ERPLAB Toolbox to do this. There is a routine called "EEG Channel Operations" that can do this sort of thing very easily, with a user-friendly syntax (e.g., "newchan73 = chan10 - chan11").</div><div><br></div><div>Steve</div><div><br><blockquote type="cite"><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>From: </b></span><span style="font-family:'Helvetica'; font-size:medium;">Bill Prinzmetal <<a href="mailto:wprinz@berkeley.edu">wprinz@berkeley.edu</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>Date: </b></span><span style="font-family:'Helvetica'; font-size:medium;">July 23, 2011 3:31:29 PM PDT<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>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><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] Add data channel</b><br></span></div><br><br>
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<div>I have input my data, referenced to all. I would like to
add a<u> new</u> channel that is not a reference channel, like Keren
et al Neuroimage (2010) that is (VOG + HOG + superior eye etc.).
I can append channel, but if I check data channel, it protests. If I
do not check that box, it does not change the channels (from 72 to
73). I could add the new calculated channel to EEG.data.73, but
the number of channels is wrong. I could change the nchan but
there is probably more to adding a channel than that. Is there
some simple (or not so simple) way of adding a new data channel?</div>
<div><br></div>
<div>I also tried to change the location file to have a channel 73,
but it did not like that either.</div>
<div><br></div>
<div>b</div></div></blockquote></div><br><div>
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