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<p>No problem. There is always the option to tell ICA which electrodes to conduct the analysis on. That way you can skip bad electrodes.</p>
<p>Best wishes,</p>
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<div style="color:rgb(0,0,0); font-family:Helvetica; margin:0px"><font face="Calibri,sans-serif" size="2"><span style="font-size:11pt"><font size="2" color="#1F497D"><span lang="en-GB" style="font-size:10pt"><b><span style="background-color:rgb(255,238,148)">Jumana
Ahmad</span></b></span></font></span></font></div>
<div style="color:rgb(0,0,0); font-family:Helvetica; margin:0px"><font face="Calibri,sans-serif" size="2"><span style="font-size:11pt"><font size="2" color="#1F497D"><span lang="en-GB" style="font-size:10pt">Post-Doctoral Research Worker in Cognitive Neuroscience </span></font></span></font></div>
<div style="color:rgb(0,0,0); font-family:Helvetica; margin:0px"><font face="Calibri,sans-serif" size="2"><span style="font-size:11pt"><font size="2" color="#1F497D"><span lang="en-GB" style="font-size:10pt"><i>EU-AIMS Longitudinal European Autism Project (LEAP)
& SynaG Study</i></span></font></span></font></div>
<div style="color:rgb(0,0,0); font-family:Helvetica; margin:0px"><font face="Calibri,sans-serif" size="2"><span style="font-size:11pt"><font size="2" color="#1F497D"><span lang="en-GB" style="font-size:10pt">Room M1.26.Department of Forensic and Neurodevelopmental
Sciences (PO 23) | Institute of Psychiatry, Psychology & Neuroscience | King’s College London | 16 De Crespigny Park | London SE5 8AF</span></font></span></font></div>
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848 5359| </span></font><font size="2" color="#1F497D"><span lang="en-GB" style="font-size:10pt"><b>Email:</b></span></font><font size="2" color="#1F497D"><span lang="en-GB" style="font-size:10pt"> <span style="background-color:rgb(255,238,148)">jumana.ahmad</span></span></font><a href="mailto:antonia.sanjose@kcl.ac.uk" target="_blank" id="LPNoLP"><font size="2" color="purple"><span lang="en-GB" style="font-size:10pt">@kcl.ac.uk</span></font></a><font size="2" color="#1F497D"><span lang="en-GB" style="font-size:10pt"> | </span></font><font size="2" color="#1F497D"><span lang="en-GB" style="font-size:10pt"><b>Website:</b></span></font><font size="2" color="#1F497D"><span lang="en-GB" style="font-size:10pt"> </span></font><a href="http://www.eu-aims.eu/" target="_blank" id="LPNoLP"><font size="2" color="purple"><span lang="en-GB" style="font-size:10pt">www.eu-aims.eu</span></font></a><font size="2" color="#1F497D"><span lang="en-GB" style="font-size:10pt"> | </span></font><font size="2" color="#1F497D"><span lang="en-GB" style="font-size:10pt"><b>Facebook:</b></span></font><font size="2" color="#1F497D"><span lang="en-GB" style="font-size:10pt"> </span></font><a href="http://www.facebook.com/euaims" target="_blank" id="LPNoLP"><font size="2" color="purple"><span lang="en-GB" style="font-size:10pt">www.facebook.com/euaims</span></font></a></span></font></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Gorka FG <gorkafraga@gmail.com><br>
<b>Sent:</b> 09 February 2017 13:41:25<br>
<b>To:</b> Ahmad, Jumana<br>
<b>Cc:</b> eeglablist@sccn.ucsd.edu<br>
<b>Subject:</b> Re: [Eeglablist] interpolate previously deleted channels</font>
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<div class="gmail_default" style="font-family:trebuchet ms,sans-serif">Hi Jumana, <br>
<br>
Thanks for your answer. I decided to remove the electrodes before performing ICA, but that is another discussion.</div>
<div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><br>
</div>
<div class="gmail_default" style="font-family:trebuchet ms,sans-serif">greetings and thanks gain</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On 8 February 2017 at 23:33, Ahmad, Jumana <span dir="ltr">
<<a href="mailto:jumana.ahmad@kcl.ac.uk" target="_blank">jumana.ahmad@kcl.ac.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><br>
Hi Gorka,<br>
You can load an old eeg dataset with the channels present and interpolate that way. See Makoto's preprocessing pipeline for an example.
<br>
I try not to delete until I interpolate to avoid the issue.<br>
Best wishes,<br>
Jumana <br>
------------------------------<wbr>------------<br>
Jumana Ahmad<br>
Post-Doctoral Research Worker in Cognitive Neuroscience<br>
EU-AIMS Longitudinal European Autism Project (LEAP) & SynaG Study<br>
Room M1.26.Department of Forensic and Neurodevelopmental Sciences (PO 23) | Institute of Psychiatry, Psychology & Neuroscience | King’s College London | 16 De Crespigny Park | London SE5 8AF<br>
<br>
Phone: 0207 848 5359| Email: <a href="mailto:jumana.ahmad@kcl.ac.uk" target="_blank">
jumana.ahmad@kcl.ac.uk</a> | Website: <a href="https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.eu-aims.eu&data=01%7C01%7Cjumana.ahmad%40kcl.ac.uk%7C4b27f2b2458a43b1eaad08d450e09505%7C8370cf1416f34c16b83c724071654356%7C0&sdata=VPE8bL4fxx488Y2eKRtqVle8NlcaxeheViWcIkc%2FlBI%3D&reserved=0" target="_blank">
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<div id="m_-976426713418222027divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b>
<a href="mailto:eeglablist-bounces@sccn.ucsd.edu" target="_blank">eeglablist-bounces@sccn.ucsd.<wbr>edu</a> <<a href="mailto:eeglablist-bounces@sccn.ucsd.edu" target="_blank">eeglablist-bounces@sccn.ucsd.<wbr>edu</a>> on behalf of Gorka FG <<a href="mailto:gorkafraga@gmail.com" target="_blank">gorkafraga@gmail.com</a>><br>
<b>Sent:</b> 07 February 2017 02:24:28<br>
<b>To:</b> <a href="mailto:eeglablist@sccn.ucsd.edu" target="_blank">eeglablist@sccn.ucsd.edu</a><br>
<b>Subject:</b> [Eeglablist] interpolate previously deleted channels</font>
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<div class="gmail_default" style="font-family:"trebuchet ms",sans-serif"><span style="font-family:arial,sans-serif">Dear all, </span><br>
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<div class="gmail_default"><br>
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<div class="gmail_default">I have a dataset in which bad channels were manually removed using EEG = pop_select (EEG, 'channel',
<i>chans2keep</i>). In later steps, I was unable to interpolate those removed channels so I did a workaround inserting blank channels and then interpolating (see below). </div>
<div class="gmail_default">Would this approach be correct? am I missing a more simple way of doing this using pop_interp? </div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">Thanks in advance for the help! <br>
Gorka</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default"><i>--</i></div>
<div class="gmail_default">%insert blank channels using <i>insertrows</i> <i> </i>( <a href="https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fnl.mathworks.com%2Fmatlabcentral%2Ffileexchange%2F9984-insertrows-a-b-ind-&data=01%7C01%7Cjumana.ahmad%40kcl.ac.uk%7Cf0ecdf1896304cae3e3408d450510fcd%7C8370cf1416f34c16b83c724071654356%7C0&sdata=%2FpE5QPm5UvY2r3dGdaxgYnXkZecjg%2FJTi3igN43%2BzZc%3D&reserved=0" target="_blank">http://nl.<wbr>mathworks.com/matlabcentral/<wbr>fileexchange/9984-insertrows-<wbr>a-b-ind-</a>)
in each trial:</div>
<div class="gmail_default"><font face="times new roman, serif"> </font><font face="arial, helvetica, sans-serif"> </font><span style="font-family:arial,helvetica,sans-serif">for trial = 1:size(EEG.data,3); % loop thru trials</span></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> tmp= EEG.data(:,:,trial);</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> for c = 1:length(chans2interpNum); % loop thru indexes of channels to interpolate</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> tmp= insertrows(tmp,zeros(1,size(<wbr>EEG.data,2))],chans2interpNum(<wbr>c)-1); %insert a row of zeros at chan index position<br>
</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> end</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> newEEG(:,:,trial) = tmp; </font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> clear tmp</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> end</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> EEG.data = newEEG;<font color="#000000" size="3"> </font></font></div>
<div class="gmail_default">%interpolate: <br>
</div>
<div class="gmail_default"><span style="color:rgb(0,0,0);font-family:"trebuchet ms",sans-serif"> </span><font face="arial, helvetica, sans-serif"><span style="color:rgb(0,0,0)">EEG = eeg_checkset(EEG);</span><br>
</font></div>
<div class="gmail_default"><font color="#000000" face="arial, helvetica, sans-serif">
<div class="gmail_default"> EEG = pop_chanedit(EEG,'load',<wbr>chanlocsfile,'besa'); </div>
<div class="gmail_default"> for c = 1:length(chans2interp);<br>
</div>
<div class="gmail_default"> EEG =pop_interp(EEG,<wbr>chans2interpNum(c), 'spherical');</div>
<div class="gmail_default"> end</div>
<div class="gmail_default"> EEG = eeg_checkset(EEG);</div>
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