<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear Martin,<div><br></div><div>what kind of machine are you using?</div><div>Did you interpolate your data to an MRI?</div><div>What is your grid resolution?</div><div><br></div><div>You have quite a high number of grid points that you want to compare.</div><div>So in case you run out of memory, I'd suggest not interpolating to an MRI (in case you have done this) but to stay on the grid-point level for your stats. Otherwise, you could use a less dense grid which obviously results in smaller data structures.</div><div><br></div><div>Good luck,</div><div><br></div><div>Julian</div><div><br><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; font-size: 12px; ">********************</div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><b>Dr. Julian Keil</b></div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><b><br></b></div>AG Multisensorische Integration<br>Psychiatrische Universitätsklinik<br>der Charité im St. Hedwig-Krankenhaus<br>Große Hamburger Straße 5-11, Raum E 307<br>10115 Berlin</div><div><br>Telefon: +49-30-2311-1879<br>Fax: +49-30-2311-2209 </div><div><a href="http://psy-ccm.charite.de/forschung/bildgebung/ag_multisensorische_integration">http://psy-ccm.charite.de/forschung/bildgebung/ag_multisensorische_integration</a></div></span>
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<br><div><div>Am 23.02.2015 um 17:00 schrieb Martin Winkels:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr"><div><div><div>Dear Fieldtrippers,<br><br></div>we encountered a problem during our DICS Beamformer-Statistics. <br><br></div>After calculating a beamformer (DICS), normalisation and building grandaverages across subjects (here exemplarily 3 subjects) we try to calculate cluster based permutation statistic (in this study: between groups - one condition). <br></div><div><br></div><div>The code we used is as follows:<br></div><div><br> cfg = [];<br> <br> cfg.method = 'montecarlo';<br> %cfg.statistic = 'depsamplesT';<br> cfg.statistic = 'ft_statfun_indepsamplesT';<br> cfg.correctm = 'cluster';<br> cfg.clusteralpha = 0.05; %ft default 0.05; <br> cfg.clusterstatistic = 'maxsum';<br> cfg.minnbchan = 2;<br> cfg.tail = 0;<br> cfg.clustertail = 0;<br> cfg.alpha = 0.025; %ft hat hier 0,025<br> <br> cfg.parameter = 'pow';<br> cfg.dim = grandavgA.dim;<br> <br> cfg.numrandomization = 1; % number of draws from the permutation distribution<br> <br> design(1,:) = [1 1 1 2 2 2];<br> design(2,:) = [1 1 1 1 1 1];<br> <br> cfg.design = design;<br> cfg.ivar = 1;<br> <br> stat = ft_sourcestatistics(cfg, grandavgA, grandavgB);<br> <br><br><br></div><div>The input data structure (grandavgA, grandavgB) is as follows:<br><br>grandavgA = <br><br> pow: [3x116380 double]<br> dim: [46 55 46]<br> inside: [116380x1 logical]<br> pos: [116380x3 double]<br> cfg: [1x1 struct]<br><br>grandavgB = <br><br> pow: [3x116380 double]<br> dim: [46 55 46]<br> inside: [116380x1 logical]<br> pos: [116380x3 double]<br> cfg: [1x1 struct]<br><br><br></div><div>Fieldtrip version: current (02/23/2015)<br><br><br></div><div>Thanks, Martin<br><br><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New"">--
</span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New"">M.Sc. Martin Winkels</span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New"">Universitätsklinikum Münster</span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New"">Institut für Biomagnetismus & Biosignalanalyse</span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New"">Malmedyweg 15</span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New"">48149 Münster</span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New"">GERMANY</span></p><div><span style="font-size:10pt;font-family:"Courier New""> </span><br class="webkit-block-placeholder"></div><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New"">Telefon: <a href="tel:%2B49%20251%2083%2056%20846" value="+492518356846" target="_blank">+49 251 83 56 846</a></span></p>
<span style="font-size:10pt;font-family:"Courier New"">Web: <a href="http://biomag.uni-muenster.de/" target="_blank">http://biomag.uni-muenster.de</a></span><br></div><div><br></div></div>
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