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<p class="MsoNormal"><span style="font-family:Helvetica">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Helvetica"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Helvetica">I'm new to Fieldtrip and I encountered a problem in ICA – after rejecting bad components with ft_rejectcomponent I noticed my data can't be plotted by databrowser anymore, but before this step it can
be visualized just fine. This is how I am perform ICA – is there something wrong in the ft_rejectcomponent part? Thank you for your help!
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Helvetica"><o:p> </o:p></span></p>
<p class="p1"><span class="apple-converted-space"> </span><o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"> </span>%% ICA<o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"><span style="color:black"> </span>
</span>% perform the independent component analysis (i.e., decompose the data), downsampling first<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>cfg<span class="apple-converted-space">
</span>= [];<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>cfg.resamplefs = 150;
<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>cfg.detrend<span class="apple-converted-space">
</span>= <span class="s2">'no'</span>;<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>data <span class="apple-converted-space">
</span>= ft_resampledata(cfg, data_all);<o:p></o:p></p>
<p class="p1"><span class="apple-converted-space"> </span><o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>cfg<span class="apple-converted-space">
</span>= [];<o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"><span style="color:black"> </span>
</span><span class="s1">cfg.method = </span><span class="s2">'runica'</span><span class="s1">;
</span>% this is the default and uses the implementation from EEGLAB<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>comp = ft_componentanalysis(cfg, data);<o:p></o:p></p>
<p class="p1"><span class="apple-converted-space"> </span><o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"><span style="color:black"> </span>
</span>%Identify components reflecting eye artifacts<o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"><span style="color:black"> </span>
</span>% plot the components for visual inspection<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>figure<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>cfg = [];<o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"><span style="color:black"> </span>
</span><span class="s1">cfg.component = 1:20; </span><span class="apple-converted-space"><span style="color:black">
</span></span>% specify the component(s) that should be plotted<o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"><span style="color:black"> </span>
</span><span class="s1">cfg.layout</span><span class="apple-converted-space"><span style="color:black">
</span></span><span class="s1">= </span><span class="s2">'acticap-64ch-standard2_XZ.mat'</span><span class="s1">;
</span>% specify the layout file that should be used for plotting<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>cfg.comment <span class="apple-converted-space">
</span>= <span class="s2">'no'</span>;<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>ft_topoplotIC(cfg, comp)<o:p></o:p></p>
<p class="p1"><span class="apple-converted-space"> </span><o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"><span style="color:black"> </span>
</span>%Further inspection of time course of component<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>cfg = [];<o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"><span style="color:black"> </span>
</span><span class="s1">cfg.layout = </span><span class="s2">'acticap-64ch-standard2_XZ.mat'</span><span class="s1">;
</span>% specify the layout file that should be used for plotting<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>cfg.viewmode = <span class="s2">
'component'</span>;<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>ft_databrowser(cfg, comp)<o:p></o:p></p>
<p class="p1"><span class="apple-converted-space"> </span><o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"><span style="color:black"> </span>
</span>%Removing bad artifacts and backprojecting data<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>cfg = [];<o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"><span style="color:black"> </span>
</span><span class="s1">cfg.component = 1; </span>% to be removed component(s)<o:p></o:p></p>
<p class="p3"><span class="apple-converted-space"> </span>data_all = ft_rejectcomponent(cfg, comp, data_all);<o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:Helvetica"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Helvetica">Best, <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Helvetica">Anqi<o:p></o:p></span></p>
<p class="p1"><o:p> </o:p></p>
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