<html><head><base href="x-msg://223/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br></div>Hi Santosh,<div><br></div><div>You said earlier that the EEG electrode positions have been scanned with a laser scanner. Are they in the Neuromag head coordinate system?</div><div><br></div><div>- Matti</div><div><br></div><div><br><div><div>On Sep 27, 2011, at 4:15 PM, Vema Krishnamurthy, Santosh wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div ocsi="x"><div style="font-family: Tahoma; direction: ltr; color: rgb(0, 0, 0); font-size: x-small; "><div></div><div dir="ltr"><font color="#000000" size="2" face="Tahoma">Hello,</font></div><div dir="ltr"><font face="tahoma"></font> </div><div dir="ltr"><font face="tahoma">I was trying to use the mne_make_eeg_layout<a></a><span class="Apple-converted-space"> </span>to make a layout file of EEG electrodes, but when I opened the file I see few of the electrodes have same values, So I was thinking of doing the calculations manually.</font></div><div dir="ltr"><font face="tahoma"></font> </div><div dir="ltr"><font face="tahoma">I have 3-d co-ordinates of EEG electrodes read into Matlab<a></a> from the raw fiff<a></a><span class="Apple-converted-space"> </span>file and I'm trying to solve the projections of these locations into 2-d plane using the equations given under Creating a custom EEG layout<a href="http://www.martinos.org/mne/manual/utilities.html#chddgdja">http://www.martinos.org/mne/manual/utilities.html#chddgdja</a>. when I plot the uk<a></a><span class="Apple-converted-space"> </span>and vk<a></a><span class="Apple-converted-space"> </span>in matlab<a></a>, it doesn't look these are the projections. So I was wondering if someone could help regarding this. All I'm trying to do is calculate the projections of 3-d EEG electrodes into a 2-d plane.</font></div><div dir="ltr"><font face="tahoma"></font> </div><div><font size="2" face="Tahoma"><div><font size="2" face="Tahoma">Thanks and Regards,</font></div><div><font size="2" face="Tahoma">---------------------------------------------------</font></div><div><font size="2" face="Tahoma"><a></a><font size="2" face="Tahoma">Santosh</font> Vema<a></a><span class="Apple-converted-space"> </span>KrishnaMurthy<a></a>, M.A.Sc<a></a></font></div><div><font size="2" face="tahoma">Medical Devices Engineer</font></div><div><font size="2" face="Tahoma">NRC Institute for Biodiagnostics<a></a><span class="Apple-converted-space"> </span>(Atlantic)</font></div><div><font size="2" face="Tahoma"><a></a><font size="2" face="Tahoma">Elekta</font>/IWK<a></a><span class="Apple-converted-space"> </span>MEG Research office</font></div><div><font size="2" face="tahoma">Ph: (902) 470-3984</font></div><div><font size="2" face="tahoma">---------------------------------------------------</font></div></font></div></div>_______________________________________________<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">https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis</a></div></span></blockquote></div><br></div></body></html>