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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi all,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m trying to run a paired t-test on a set of data that have been converted from SPM format using the function fttimelock, but I’m not sure if I’ve got the settings correct for it. The data consists of 16 subjects in a within-subject design with 2 conditions, from the help manual, I assumed that cfg.design should be:<o:p></o:p></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>[ones(1,16),ones(1,16)*2; 1:16, 1:16]</span><span style='font-size:10.0pt;font-family:"Courier New";color:black'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:12.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal>With the rest of the code being:<o:p></o:p></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.method = 'stats';</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.alpha = 0.05;</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.tail = 0;</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.feedback = 'gui';</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.statistic = 'ttest2';</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.ivar = 1;</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.uvar = 2;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>stats = ft_timelockstatistics(cfg,Subjects(1).timelockIllusory, Subjects(2).timelockIllusory,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(3).timelockIllusory, Subjects(4).timelockIllusory,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(5).timelockIllusory, Subjects(6).timelockIllusory,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(7).timelockIllusory, Subjects(8).timelockIllusory,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(9).timelockIllusory, Subjects(10).timelockIllusory,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(11).timelockIllusory, Subjects(12).timelockIllusory,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(13).timelockIllusory, Subjects(14).timelockIllusory,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(15).timelockIllusory, Subjects(16).timelockIllusory,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(1).timelockControl, Subjects(2).timelockControl,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(3).timelockControl, Subjects(4).timelockControl,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(5).timelockControl, Subjects(6).timelockControl,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(7).timelockControl, Subjects(8).timelockControl,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(9).timelockControl, Subjects(10).timelockControl,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(11).timelockControl, Subjects(12).timelockControl,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(13).timelockControl, Subjects(14).timelockControl,...</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'> Subjects(15).timelockControl, Subjects(16).timelockControl);</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><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 style='text-autospace:none'>But if I run it, it comes up with an error saying that it’s only expecting one row in the design matrix. If it’s run with the design matrix just being <span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>[ones(1,16),ones(1,16)*2]</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal>Then it runs fine and the result does look correct, but I’m not sure if it is. Is what I’ve done a paired t-test? Or is it running an unpaired t-test?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Also when running it through using the monte carlo method, I’m uncertain as to what values cfg.ivar, cfg.uvar, cfg.wvar and cfg.cvar should be, at the moment I’m using:<o:p></o:p></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.method = 'montecarlo';</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.design = [ones(1,16),ones(1,16)*2];</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.alpha = 0.05;</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.tail = 0;</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.feedback = 'gui';</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.statistic = 'depsamplesT';</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.ivar = 1;</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.uvar = 2;</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.wvar = 2;</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#4F81BD'>cfg.numrandomization = 'all';</span><span style='font-size:12.0pt;font-family:"Courier New";color:#4F81BD'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>but it keeps coming up with the following error:<o:p></o:p></p><p class=MsoNormal><span style='color:red'>??? Index exceeds matrix dimensions.<o:p></o:p></span></p><p class=MsoNormal><span style='color:red'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:red'>Error in ==> resampledesign at 103<o:p></o:p></span></p><p class=MsoNormal><span style='color:red'> blkmeas = unique(design(cfg.wvar,:)', 'rows')';<o:p></o:p></span></p><p class=MsoNormal><span style='color:red'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:red'>Error in ==> statistics_montecarlo at 187<o:p></o:p></span></p><p class=MsoNormal><span style='color:red'>resample = resampledesign(cfg, design);<o:p></o:p></span></p><p class=MsoNormal><span style='color:red'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:red'>Error in ==> statistics_wrapper at 290<o:p></o:p></span></p><p class=MsoNormal><span style='color:red'> [stat, cfg] = statmethod(cfg, dat, design, 'issource',issource);<o:p></o:p></span></p><p class=MsoNormal><span style='color:red'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:red'>Error in ==> ft_timelockstatistics at 124<o:p></o:p></span></p><p class=MsoNormal><span style='color:red'>[stat, cfg] = statistics_wrapper(cfg, varargin{:});<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>What am I doing wrong here?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Any help would be greatly appreciated.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Kind regards,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Julian<o:p></o:p></p></div></body></html>