<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Grazia,<br class=""><div class="">In the past I ran into difficulty with my trial function when my triggers were strings. can you remove the ’S’ and change your triggers to numeric values? If not, perhaps I can try if you give me a snippet of data (although I am unfamiliar with .vmk), my old trial functions did what you need. Alternatively, break down this process by using ft_read_event ( <a href="http://www.fieldtriptoolbox.org/reference/ft_read_event" class="">http://www.fieldtriptoolbox.org/reference/ft_read_event</a>) and ft_read_header (<a href="http://www.fieldtriptoolbox.org/reference/ft_read_header" class="">http://www.fieldtriptoolbox.org/reference/ft_read_header</a>).</div><div class=""><br class=""></div><div class="">Best,</div><div class=""><br class=""></div><div class="">Raquel<br class=""><div class=""><div><blockquote type="cite" class=""><div class="">On Oct 30, 2015, at 1:49 PM, Grazia Di Pisa <<a href="mailto:g.dipisa@gmail.com" class="">g.dipisa@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Hi all,</div><div class=""><br class=""></div><div class="">I have a question about ft_redefinetrial. So, I have two conditions S 11 and S 31, respectively ‘in-synch’ and ’not-in-synch’ and participants were instructed to press 1 or 2 in the keyboard to report their answer, S 1 for ‘not-in-synch’ and S 2 for ‘in-synch’.</div><div class=""><br class=""></div><div class="">What I need to do is TFR analysis only for the trials where participants answered correctly, that is S 11 & S 2 and S 31 & S 1 (below an extract from a .vmrk file showing a correct match).</div><div class=""><br class=""></div><div class="">Mk3=Stimulus,<b class="">S 11</b>,33182,1,0</div><div class="">Mk4=Stimulus,S 12,33782,1,0</div><div class="">Mk5=Stimulus,S 13,33902,1,0</div><div class="">Mk6=Stimulus,S 14,34582,1,0</div><div class="">Mk7=Stimulus,<b class="">S 2</b>,37915,1,0</div><div class=""><br class=""></div><div class="">Mk8=Stimulus,<b class="">S 31</b>,40352,1,0</div><div class="">Mk9=Stimulus,S 63,40952,1,0</div><div class="">Mk10=Stimulus,S 32,40953,1,0</div><div class="">Mk11=Stimulus,S 33,41112,1,0</div><div class="">Mk12=Stimulus,S 35,41792,1,0</div><div class="">Mk13=Stimulus,S 34,41793,1,0</div><div class="">Mk14=Stimulus,S 35,44634,1,0</div><div class="">Mk15=Stimulus,<b class="">S 1</b>,44635,1,0</div><div class=""><br class=""></div><div class="">From the tutorials, I’ve understood that I should have done this in my trialfun when I defined my trials during the pre-processing step, but today we realised that some subjects perceived as out-of-synch the condition in-synch and viceversa.</div><div class=""><br class=""></div><div class="">So, I was wondering how could I do this now - could I do this using the ft_redefinetrial or worst-case-scenario should I do the pre-processing all over again?</div><div class=""><br class=""></div><div class="">I wrote the code below before starting the TRF analysis but it’s not correct since it’s not working:</div><div class=""><br class=""></div><div class=""><div class="">%Redefine trials</div><div class=""> cfg = [];</div><div class=""> cfg.trials = 'all';</div><div class=""> cfg.trialdef.eventtype = 'Stimulus'; % we are interested in Stimulus markers</div><div class=""> cfg.trialdef.eventvalue = { 'S 11' 'S 31' };</div><div class=""> cfg.trialdef.eventcorrect = [ 'S 2' 'S 1' ]; <span class="Apple-tab-span" style="white-space:pre"> </span>% correct response Stimulus S 2 for S 11 and S 1 for S 31</div><div class=""> cfg.toilim = [-1.8 2.0]; </div><div class=""> </div><div class=""> data = ft_redefinetrial(cfg, data);</div></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">Any suggestions/help is more than welcome!</div><div class=""><br class=""></div><div class="">thanks in advance,</div><div class="">~ grazia</div><div apple-content-edited="true" class=""><div style="letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class=""><br class=""></div></div><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">
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