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<p class="MsoNormal"><span style="font-family:Helvetica">Hi Tzvetan,<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">Thank you for your quick reply! However, before I rejected ICA components I did not get the '</span><span style="font-family:Helvetica;color:black">ft_fetch_data' error when I visualized the data, so
this implies that the segmentation is alright, but something went wrong in the ICA rejection step, right?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Helvetica;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Helvetica;color:black">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Helvetica;color:black">Anqi<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"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">fieldtrip <fieldtrip-bounces@science.ru.nl> on behalf of Tzvetan Popov via fieldtrip <fieldtrip@science.ru.nl><br>
<b>Reply-To: </b>FieldTrip discussion list <fieldtrip@science.ru.nl><br>
<b>Date: </b>Saturday, March 26, 2022 at 11:17 AM<br>
<b>To: </b>FieldTrip discussion list <fieldtrip@science.ru.nl><br>
<b>Cc: </b>Tzvetan Popov <tzvetan.popov@uni-konstanz.de><br>
<b>Subject: </b>Re: [FieldTrip] error with databrowser after rejecting components in ICA<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Dear Anqi, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The cause for this error is that somewhere during the segmentation a sample at the end of trial N is also at the begin of trial N+1. Hence, you might re-consider your segmentation/trial length.<o:p></o:p></p>
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<p class="MsoNormal">As for the plotting, you could remove comp = rmfield(comp,’sampleinfo’) and you will be able to plot.<o:p></o:p></p>
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<p class="MsoNormal">Note, however, the first issue needs a fix.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Good luck<o:p></o:p></p>
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<p class="MsoNormal">Tzvetan<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<o:p></o:p></p>
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<p class="MsoNormal">On 26 Mar 2022, at 10:10, Lei, A. (Anqi) via fieldtrip <<a href="mailto:fieldtrip@science.ru.nl">fieldtrip@science.ru.nl</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:Helvetica">Hello,</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:Helvetica"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:Helvetica">I was performing ICA on my EEG data and the script was running smoothly until I rejected bad components using 'ft_rejectcomponent' – after that I couldn't visualize my data using databrowser and got this
error:<span class="apple-converted-space"> </span></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:Helvetica"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:Helvetica">"Error using ft_fetch_data (line 168)</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:Helvetica">some of the requested samples occur twice in the data and have conflicting values"</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:Helvetica"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:Helvetica">This is the script I used for ICA, could you let me know what might be wrong? Thank you so much!</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:Helvetica"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="text-indent:.25in"><span style="font-size:7.5pt;font-family:Courier;color:#028009">%% ICA<span class="apple-converted-space"> </span><o:p></o:p></span></p>
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<p class="MsoNormal" style="text-indent:.25in"><span style="font-size:7.5pt;font-family:Courier;color:#028009">%Decomposition of EEG data<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">cfg<span class="apple-converted-space"> </span>= [];<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">cfg.resamplefs = 150;<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">cfg.detrend<span class="apple-converted-space"> </span>=<span class="apple-converted-space"> </span><span class="s2"><span style="color:#AA04F9">'no'</span></span>;<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">data<span class="apple-converted-space"> </span>= ft_resampledata(cfg, data_all);<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier"><o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">cfg<span class="apple-converted-space"> </span>= [];<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span class="s1"><span style="font-size:7.5pt;font-family:Courier;color:#028009">cfg.method =</span></span><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span class="s2"><span style="font-size:7.5pt;font-family:Courier;color:#AA04F9">'runica'</span></span><span class="s1"><span style="font-size:7.5pt;font-family:Courier;color:#028009">;</span></span><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span style="font-size:7.5pt;font-family:Courier;color:#028009">%
this is the default and uses the implementation from EEGLAB<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">comp = ft_componentanalysis(cfg, data);<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier"><o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span style="font-size:7.5pt;font-family:Courier;color:#028009">%Identify components reflecting eye artifacts<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span style="font-size:7.5pt;font-family:Courier;color:#028009">% plot the components for visual inspection<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">figure<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">cfg = [];<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span class="s1"><span style="font-size:7.5pt;font-family:Courier;color:#028009">cfg.component = 1:20;</span></span><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009">
</span></span><span style="font-size:7.5pt;font-family:Courier;color:#028009">% specify the component(s) that should be plotted<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span class="s1"><span style="font-size:7.5pt;font-family:Courier;color:#028009">cfg.layout</span></span><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009">
</span></span><span class="s1"><span style="font-size:7.5pt;font-family:Courier;color:#028009">=</span></span><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span class="s2"><span style="font-size:7.5pt;font-family:Courier;color:#AA04F9">'acticap-64ch-standard2_XZ.mat'</span></span><span class="s1"><span style="font-size:7.5pt;font-family:Courier;color:#028009">;</span></span><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span style="font-size:7.5pt;font-family:Courier;color:#028009">%
specify the layout file that should be used for plotting<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">cfg.comment<span class="apple-converted-space"> </span>=<span class="apple-converted-space"> </span><span class="s2"><span style="color:#AA04F9">'no'</span></span>;<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">ft_topoplotIC(cfg, comp)<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier"><o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span style="font-size:7.5pt;font-family:Courier;color:#028009">%Removing bad artifacts and backprojecting data<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">cfg = [];<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">cfg.component = [1 2];<span class="apple-converted-space"> </span><span class="s4"><span style="color:#028009">%
e.g. to be removed component(s)</span></span><o:p></o:p></span></p>
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<p class="MsoNormal" style="text-indent:.25in"><span style="font-size:7.5pt;font-family:Courier">data_all = ft_rejectcomponent(cfg, comp, data_all);<o:p></o:p></span></p>
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<p class="MsoNormal" style="text-indent:.25in"><span style="font-size:7.5pt;font-family:Courier"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span style="font-size:7.5pt;font-family:Courier;color:#028009">%Display data (this is where the error message occurs)<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">cfg = [];<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span class="s1"><span style="font-size:7.5pt;font-family:Courier;color:#028009">cfg.layout =</span></span><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span class="s2"><span style="font-size:7.5pt;font-family:Courier;color:#AA04F9">'acticap-64ch-standard2_XZ.mat'</span></span><span class="s1"><span style="font-size:7.5pt;font-family:Courier;color:#028009">;</span></span><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier;color:#028009"> </span></span><span style="font-size:7.5pt;font-family:Courier;color:#028009">%
specify the layout file that should be used for plotting<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">cfg.viewmode =<span class="apple-converted-space"> </span><span class="s2"><span style="color:#AA04F9">'vertical'</span></span>;<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier">ft_databrowser(cfg, data_all);<o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier"><o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:Courier"> </span></span><span style="font-size:7.5pt;font-family:Courier"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Helvetica">Best,</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:Helvetica">Anqi</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Helvetica">_______________________________________________<br>
fieldtrip mailing list<br>
</span><a href="https://mailman.science.ru.nl/mailman/listinfo/fieldtrip"><span style="font-size:9.0pt;font-family:Helvetica">https://mailman.science.ru.nl/mailman/listinfo/fieldtrip</span></a><span style="font-size:9.0pt;font-family:Helvetica"><br>
</span><a href="https://urldefense.com/v3/__https:/doi.org/10.1371/journal.pcbi.1002202__;!!HJOPV4FYYWzcc1jazlU!9tln1tvYAQXPiR98H6m9to3tVWIqZQy05x_y2b6wMAJp84HSW6ENGENFxkKOAN-Qz2YJs81chXw_B-VroFuMGA$"><span style="font-size:9.0pt;font-family:Helvetica">https://doi.org/10.1371/journal.pcbi.1002202</span></a><o:p></o:p></p>
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