<div dir="ltr"><div><div><div>Hi Ghislain,<br><br></div>Do you actually need to epoch
just a subset of channels? What I usually do is apply my pre-processing
(including epoching) to the whole montage, and I don't worry about
pulling out specific channels until I get to data analysis (e.g. when I
want to plot just the channel that I care about, or run statistics just
on a couple channels, or whatever). <br><br></div><div>An additional
benefit of keeping all the data for as long as I can is that if I later
decide to do some post-hoc, exploratory analysis on some other channels,
I already have that data, instead of having to re-run my preprocessing
on those other channels.<br></div><div><br></div>Best,<br></div>Steve</div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><br><br></div><span><div>---<br></div>Stephen Politzer-Ahles<br>University of Oxford<br>Language and Brain Lab<br>Faculty of Linguistics, Phonetics & Philology<br><a href="http://users.ox.ac.uk/%7Ecpgl0080/" target="_blank">http://users.ox.ac.uk/~cpgl0080/</a></span><a href="http://www.nyu.edu/projects/politzer-ahles/" target="_blank"></a></div></div></div></div></div></div></div>
<br><div class="gmail_quote">On Fri, Jul 8, 2016 at 8:38 PM, Ghislain d'Entremont <span dir="ltr"><<a href="mailto:ghislaindentremont@gmail.com" target="_blank">ghislaindentremont@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hi all, </div><div><br></div><div>I just started using MNE to analyze some EEG data I collected for a study I am conducting. So far, I've been enjoying learning about the package. The tutorials online are great. However, I seem to be stuck on something I can only imagine is straightforward. First, an overview of what I am trying to accomplish:</div><div><br></div><div>I use a 64-electrode cap. </div><div><br></div><div>Ultimately, I want to (1) re-reference to the average of all electrodes, (2) apply some basic filters (3) look ERPs of 4 channels for various target types. </div><div><br></div><div>I get stuck getting epochs (3). When trying to select one channel to epoch, I get the warning message telling me that I should not apply a projector to 1/64 of channels... </div><div><br></div><div>How do I get around this given that I want to both re-reference to the average of <i>all </i>electrodes and only do analysis on some subset of channels. </div><div><br></div><div>I imagine that it is clear that I am confused, so any conceptual tips with respect to the implementation of this package will be helpful. </div><div><br></div><div>I've attached the script I have been using. The last line of that script is where I get stuck (as the comments will show). </div><div><br></div><div>Any help will be greatly appreciated.</div><div><br></div><div>Thank you, </div><span class="HOEnZb"><font color="#888888"><br clear="all"><div><div data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><b>Ghislain d'Entremont</b><div>BSc, Neuroscience, Honors </div><div>Dalhousie University </div><div>tel: <a href="tel:902-802-5671" value="+19028025671" target="_blank">902-802-5671</a> (text) </div></div></div></div></div></div></div></div></div></div>
</font></span></div>
<br>_______________________________________________<br>
Mne_analysis mailing list<br>
<a href="mailto:Mne_analysis@nmr.mgh.harvard.edu">Mne_analysis@nmr.mgh.harvard.edu</a><br>
<a href="https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis" rel="noreferrer" target="_blank">https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis</a><br>
<br>
<br>
The information in this e-mail is intended only for the person to whom it is<br>
addressed. If you believe this e-mail was sent to you in error and the e-mail<br>
contains patient information, please contact the Partners Compliance HelpLine at<br>
<a href="http://www.partners.org/complianceline" rel="noreferrer" target="_blank">http://www.partners.org/complianceline</a> . If the e-mail was sent to you in error<br>
but does not contain patient information, please contact the sender and properly<br>
dispose of the e-mail.<br>
<br></blockquote></div><br></div>