<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=""><div class="">Dear all,</div><div class=""><br class=""></div><div class="">I’m currently trying to do ICA to remove eye blinks from my EEG data.</div><div class="">I've basically used the script on the tutorial, and even thou it says ‘removing 4 components’ then it gives me 'not applying the backprojection matrix to the sensor description’.</div><div class=""><br class=""></div><div class=""><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span><<<span class="Apple-tab-span" style="white-space:pre"> </span>detected 0 visual</div><div class=""> removing 4 components</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>keeping 57 components</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>processing trials</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>processing trial 166 from 166</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>not applying the backprojection matrix to the sensor description</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>the call to "ft_rejectcomponent" took 1 seconds and required the additional allocation of an estimated 245 MB<span class="Apple-tab-span" style="white-space:pre"> </span>>> </div></div><div class=""><br class=""></div><div class="">Shouldn’t it be 'applying the backprojection matrix to the sensor description’ in order to be effective?</div><div class="">If someone could give some explanation, it would be very much appreciated!</div><div class=""><br class=""></div><div class="">This is the script I used:</div><div class=""><br class=""></div><div class=""><div class=""> cfg = [];</div><div class=""> cfg.method = 'runica'; </div><div class=""> cfg.channel = 'EEG'; </div><div class=""> </div><div class=""> comp = ft_componentanalysis(cfg, data);</div><div class=""><br class=""></div><div class="">%% Identify the artifacts:</div><div class=""><br class=""></div><div class=""> figure</div><div class=""> cfg = [];</div><div class=""> cfg.component = 1:30; </div><div class=""> cfg.layout = 'biosemi64.lay'; </div><div class=""> cfg.comment = 'no';</div><div class=""><br class=""></div><div class=""> ft_topoplotIC(cfg, comp)</div><div class=""><br class=""></div><div class="">%% Further inspection of the time course of the components:</div><div class=""><br class=""></div><div class=""> cfg = [];</div><div class=""> cfg.layout = 'biosemi64.lay'; </div><div class=""> cfg.viewmode = 'component';</div><div class=""><br class=""></div><div class=""> ft_databrowser(cfg, comp); </div><div class=""><br class=""></div><div class=""> %% Remove components and backprojecting:</div><div class=""> </div><div class=""> cfg = []; </div><div class=""> cfg.component = [2 53 54 61]; % to be removed component(s)</div><div class=""> cfg.demean = 'no';</div><div class=""> cfg.updatesens = 'yes';</div><div class=""><br class=""></div><div class=""> data.ica.analysed = ft_rejectcomponent(cfg, comp);</div></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">best,</div><div class="">~ grazia</div><div apple-content-edited="true" class=""><div style="color: rgb(0, 0, 0); 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=""><br class=""></div><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">
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