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<p class="MsoNormal">Dear Fieldtrippers,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am rather new to this, but am attempting to do some cluster stats on my ERP sensor level data. It is working well, and I can cluster across time, but I can’t get it to cluster across electrode locations. I think it is because of a mistake
that I am making in my ‘neighbours’ file, although it looks fine when I inspect it. This is the error message that I get:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">??? Cell contents reference from a non-cell array object.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Error in ==> clusterstat>makechanneighbstructmat at 520<o:p></o:p></p>
<p class="MsoNormal"> [seld] = match_str(cfg.channel, cfg.neighbours{chan}.label);<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Error in ==> clusterstat at 60<o:p></o:p></p>
<p class="MsoNormal"> channeighbstructmat = makechanneighbstructmat(cfg);<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Error in ==> statistics_montecarlo at 322<o:p></o:p></p>
<p class="MsoNormal"> [stat, cfg] = clusterstat(cfg, statrand, statobs,'issource',issource);<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Error in ==> statistics_wrapper at 285<o:p></o:p></p>
<p class="MsoNormal"> [stat, cfg] = statmethod(cfg, dat, cfg.design, 'issource',issource);<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Error in ==> ft_timelockstatistics at 119<o:p></o:p></p>
<p class="MsoNormal">[stat, cfg] = statistics_wrapper(cfg, varargin{:});<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Can anyone spot what I am doing wrong?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This is how I make my neighbour file:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black">cfg = [];</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black">cfg.layout =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'EEG1010.lay'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;
</span><span style="font-size:10.0pt;font-family:"Courier New";color:forestgreen">% try 'distance' as well</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black">cfg.feedback =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'yes'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;
</span><span style="font-size:10.0pt;font-family:"Courier New";color:forestgreen">% show a neighbour plot
</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black">cfg.method =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'template'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black">cfg.neighbourdist =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'number'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black">cfg.template =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'EEG1010_neighb.mat'</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black">cfg.channel =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'all'</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black">cfg.feedback =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'yes'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black">neighbours = ft_prepare_neighbours(cfg, Load5Hard);
</span><span style="font-size:10.0pt;font-family:"Courier New";color:forestgreen">% define neighbouring channels
</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This is how I then try the stats:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg = [];</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.channel =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'all'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.latency = [0.1 1.3];</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.avgovertime =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'no'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.avgoverchannel =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'no'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.parameter =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'individual'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.method =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'montecarlo'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.statistic =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'depsamplesT'</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.alpha = 0.05;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.correctm =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'cluster'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;
</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.correcttail =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'prob'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.numrandomization = 1000;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.feedback =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'yes'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;
</span><span style="font-size:10.0pt;font-family:"Courier New";color:forestgreen">% show a neighbour plot
</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.neighbours = neighbours;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span><span style="font-size:10.0pt;font-family:"Courier New";color:forestgreen">%cfg.minnbchan = 2;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.clusterstatistic =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'maxsum'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.clusterthreshold =
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#A020F0">'nonparametric'</span><span style="font-size:10.0pt;font-family:"Courier New";color:black">;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.clusteralpha = 0.01;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.clustercritval = 0.06;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span><span style="font-size:10.0pt;font-family:"Courier New";color:forestgreen">% cfg.clustertail = 0;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.tail = 0;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> Nsub = 19;</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.design(1,1:2*Nsub) = [ones(1,Nsub) 2*ones(1,Nsub)];</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.design(2,1:2*Nsub) = [1:Nsub 1:Nsub];</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.ivar = 1;
</span><span style="font-size:10.0pt;font-family:"Courier New";color:forestgreen">% the 1st row in cfg.design contains the independent variable</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> cfg.uvar = 2;
</span><span style="font-size:10.0pt;font-family:"Courier New";color:forestgreen">% the 2nd row in cfg.design contains the subject number</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> </span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:black">[stat] = ft_timelockstatistics(cfg, Load3Hard, Load3Easy)</span><span style="font-size:12.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any suggestions very gratefully received. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Duncan<o:p></o:p></p>
<p class="MsoNormal">________________________________________________<o:p></o:p></p>
<p class="MsoNormal">Dr. Duncan Astle,<o:p></o:p></p>
<p class="MsoNormal">Programme Leader Track,<o:p></o:p></p>
<p class="MsoNormal">British Academy Research Fellow,<o:p></o:p></p>
<p class="MsoNormal">MRC Cognition and Brain Sciences Unit,<o:p></o:p></p>
<p class="MsoNormal">Chaucer Road,<o:p></o:p></p>
<p class="MsoNormal">Cambridge.<o:p></o:p></p>
<p class="MsoNormal">Duncan.Astle@mrc-cbu.cam.ac.uk<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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