<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;"><br><div><div>Hi Hweeling,</div><div><br></div><blockquote type="cite"><div dir="ltr"><br><div><br></div><div>Another question, is there an easier way to re-reference the EEG signals to an averaged montage?</div></div></blockquote>yes quite easy. Just specify cfg.reref = ‘yes’; and cfg.refchannel = ‘all’; during the call to ft_preprocessing.</div><div>best</div><div>tzvetan</div><div><br><blockquote type="cite"><div dir="ltr"><div><br></div><div>Cheers,</div><div>
Hweeling</div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On 30 June 2014 15:26, "Jörn M. Horschig" <span dir="ltr"><<a href="mailto:jm.horschig@donders.ru.nl" target="_blank">jm.horschig@donders.ru.nl</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear Hweeling,<br>
<br>
re-referencing is a linear step and can be done at any time preceding any non-linear transformation, e.g. computing a power spectrum. So it depends on what type of preprocessing you have planned, but for the most usual preprocessing steps the answer is that it would not make any difference when exactly you are doing this.<br>
<br>
Best,<br>
Jörn<div><div class="h5"><br>
<br>
On 6/30/2014 11:19 AM, Hwee Ling Lee wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">
Dear all,<br>
<br>
I was wondering if re-referencing of EEG signals should be done before trial definition or after all the preprocessing have been done.<br>
<br>
Would it make a difference in terms of statistical analyses?<br>
<br>
Thanks.<br>
<br>
Best regards,<br>
Hweeling<br>
<br>
<br>
<br></div></div><div class="">
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Jörn M. Horschig<br>
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Radboud University Nijmegen<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr">=================================================<br>Dr. rer. nat. Lee, Hwee Ling<br>Postdoc<br>German Center for Neurodegenerative Diseases (DZNE) Bonn<br>
<br>Email 1: hwee-ling.lee<at><a href="http://dzne.de/" target="_blank">dzne.de</a><br>Email 2: hweeling.lee<at><a href="http://gmail.com/" target="_blank">gmail.com</a><div><br></div><div><a href="https://sites.google.com/site/hweelinglee/home" target="_blank">https://sites.google.com/site/hweelinglee/home</a><br>
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