<div dir="ltr">Dear Tarik,<div><br></div><div>I think what happened is there is two versions of my question, i'll try to avoid that.</div><div><br></div><div>The eeglab reads the locations if the labels known via "Look up locs" button, and the dataset that i'm working in offer that <a href="http://www.physionet.org/pn4/eegmmidb/">http://www.physionet.org/pn4/eegmmidb/</a>, </div>
<div>i just have to make sure that the labels named correctly, for example "C3" instead of "C3.." and the "Look up locs" works perfectly.</div><div><br></div><div>Thank you for your explanations, i don't have time now for understanding EGI location files, but i will find it and i'll be sure to post the file to the eeglab locations page soon.</div>
<div><br></div><div>I'm not using any egi system and 'm not an expert in this field.</div><div><br></div><div>Best,</div><div>Khaled</div><div> <br><br><div class="gmail_quote">On Thu, Dec 27, 2012 at 10:17 PM, Tarik S Bel-Bahar <span dir="ltr"><<a href="mailto:tarikbelbahar@gmail.com" target="_blank">tarikbelbahar@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><font color="#333399">Hi Khaled,</font><div><font color="#333399"><br></font></div><div><font color="#333399">just a few quick thoughts that might help you...let us know of your success. When you are done </font></div>
<div><font color="#333399">please be sure to post </font><span style="color:rgb(51,51,153)">your file to the eeglab locations page.</span></div><div><div><font color="#333399"><br>
</font></div><div><font color="#333399">I think when it says .txt file, it means that EEGLAB can accept location files that are in a text format.</font></div><div><font color="#333399">That being said, I am sure the info within the text file has to be formatted correctly. You can check</font></div>
<div><font color="#333399">yourself by looking at the content of example channel location files.</font></div><div><font color="#333399">Eeglab generally can recognize and import most of these file types.</font></div>
<div><font color="#333399"><br></font></div><div><font color="#333399">The EGI document table basically lists labels (such as the 10-10 labels) in the first column.</font></div>
<div><font color="#333399">For example, on page 7, using a 128 channel Hydrocel EGI montage, the closest to C3 is channel 36.</font></div><div><font color="#333399">If you read the explanation, the arclength should be total estimated error in distance between the </font></div>
<div><font color="#333399">actual electrode and the ideal 10-10 label in question.</font></div><div><font color="#333399"><br></font></div><div><font color="#333399">Just be careful because there are old and new(hydrocel) EGi location files.</font></div>
<div><font color="#333399">In the past, what I did was within eeglab, I modified the labels for the channels with the correct 10-10 labels</font></div><div><font color="#333399">for an egi system. If you are indeed using a 64-channel net, then you need to find the correct files</font></div>
<div><font color="#333399">and 10-10 or 10-20 matches for that montage. If using EGI system, you can contact egi support</font></div><div><font color="#333399">if you don't find it by searching further on their ftp site. You should have already found this </font></div>
<div><font color="#333399">tech note there: <a href="http://ueleeglabwiki.pbworks.com/f/200_ElectrodePositions.pdf" target="_blank">http://ueleeglabwiki.pbworks.com/f/200_ElectrodePositions.pdf</a></font></div><div>
<font color="#333399"><br></font></div><div><font color="#333399">some other points: it's not clear if you are using an egi system, and whether you actually have </font></div>
<div><font color="#333399">a general locations file for the 64 net that you are using.</font></div><div><font color="#333399"><br></font></div><div><font color="#333399">Good luck with your process!<br>
</font>
<br><br><div class="gmail_quote"><div class="im">On Thu, Dec 20, 2012 at 1:56 PM, Khaled Al-Kamha <span dir="ltr"><<a href="mailto:khaled.alkamha@gmail.com" target="_blank">khaled.alkamha@gmail.com</a>></span> wrote:<br>
</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">
<div dir="ltr"><span style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif">Hi Steve,</span><div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif">
<br></div><div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif">I'm working on EGGLAB, and as i see here <a href="ftp://sccn.ucsd.edu/pub/locfiles/" style="color:rgb(17,85,204)" target="_blank">ftp://sccn.ucsd.edu/pub/locfiles/</a> EEGLAB channel location formats are:</div>
<div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif"><br></div><div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif">
".loc" for polar coordinates</div><div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif">".xyz" for 3-d carthesian coordinates</div>
<div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif">".sph" for 3-d spherical coordinates</div><div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif">
".txt" for all coordinates formats</div><div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif"><br></div><div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif">
It seems i need the ".txt" file for further steps, but i didn't find it for my 10/10 standard and 64 channels.</div><div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif">
actually, i have kind of poor experience in this field and critical time for my graduation project, plus i didn't fully understand what the table means <a href="ftp://ftp.egi.com/pub/documentation/technotes/HydroCelGSN_10-20.pdf" style="color:rgb(17,85,204)" target="_blank">ftp://ftp.egi.com/pub/documentation/technotes/HydroCelGSN_10-20.pdf</a></div>
<div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif">Any simple explanations, i appreciate it </div><div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif">
<br></div><div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif">Thanks in advance</div><br><div class="gmail_quote">On Wed, Dec 19, 2012 at 4:01 AM, <span dir="ltr"><<a href="mailto:eeglablist-request@sccn.ucsd.edu" target="_blank">eeglablist-request@sccn.ucsd.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> 1. Re: Channel Location File (Stephen Politzer-Ahles)</blockquote></div><br></div>
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