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Ciao Bianca,
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<div class="">I assume that you have already consulted the code to look for the answer. As you can see on line 140 and beyond, the fields of the data structure that are used for hte LRP are called ‘avg’. To me this suggests that you should do cfg.keeptrials
= ’no’ in ft_timelockanalysis. For the channelcmb, (also see lines 140 and beyond) the left and right columns of this are used to define the corresponding ‘left’ and ‘right’ channels that are to be subtracted. So - indeed - you either leave out the midline
electrodes, or you include them in the channelcmb as {‘midline1’ ‘midline1’} (etc), which will result in a LRP of 0 on those channels.</div>
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<div class="">Best wishes,</div>
<div class="">Jan-Mathijs</div>
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<div class="">On 18 Mar 2021, at 13:54, Bianca Trovò <<a href="mailto:bianca.trovo@alumni.unitn.it" class="">bianca.trovo@alumni.unitn.it</a>> wrote:</div>
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<div dir="ltr" class="">Hello,
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<div class="">I wanted to ask for some clarification regarding <a href="https://www.fieldtriptoolbox.org/reference/ft_lateralizedpotential/" target="_blank" class="">this function for computing the lateralized readiness potential (LRP)</a>.<br class="">
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<div dir="ltr" class="">The input datasets that come from FT_TIMELOCKANALYSIS such as avgL, avgR should have cfg.keeptrials = 'yes'? How do I define </div>
<div dir="ltr" class="">the configuration: cfg.channelcmb = Nx2 cell-array? Since I have a 64 EEG cap, should I divide 60 channels into 2 columns leaving out the midline electrodes (2, 12, 30 etc)? I assume that this channel combination serves for the subtraction?<br class="">
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<span style="font-family: "Segoe UI", sans-serif; font-size: 12.8px;" class="">Thanks for your help.</span><br style="font-family: "Segoe UI", sans-serif; font-size: 12.8px;" class="">
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<span style="font-family: "Segoe UI", sans-serif; font-size: 12.8px;" class="">Best,</span><br class="">
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<div dir="ltr" class=""><font class=""><font size="2" class=""><font face="verdana, sans-serif" class=""><b class=""><b style="color:rgb(64,64,64);font-family:"Segoe UI",sans-serif;font-size:12.8px" class=""><span style="color:rgb(11,83,148)" class="">------------------------------------------------------------</span><span style="font-family:verdana,sans-serif" class=""><span style="color:rgb(11,83,148)" class=""><a href="http://internationaloffice.ceasaclay.com/" target="_blank" class=""><br class="">
</a></span></span></b></b></font></font></font></div>
<div dir="ltr" class=""><font size="2" class=""><font face="verdana, sans-serif" color="#4c1130" class=""><b class="">Bianca Trovò,</b></font></font></div>
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<div style="" class=""><font face="garamond, times new roman, serif" class=""><br class="">
</font></div>
<div class=""><font face="garamond, times new roman, serif" style="" class=""><b class="">Ph.D. candidate in
<i class="">Brain, Behaviour, Cognition</i></b></font></div>
<div class=""><font face="garamond, times new roman, serif" color="#444444" class=""><b class="">Sorbonne Université (Faculty of Science & Engineering), <br class="">
</b></font></div>
<div class=""><font face="garamond, times new roman, serif" color="#444444" class=""><b class="">Cognitive Neuroimaging Unit (UNICOG Lab), Inserm U992<br class="">
Paris-Saclay, FRANCE - <a href="https://orcid.org/0000-0002-6776-2304" target="_blank" class="">
ORCID</a> | <a href="https://scholar.google.com/citations?user=hoCMB_kAAAAJ&hl=en" target="_blank" class="">
Google Scholar</a></b></font></div>
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