<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Andrew,<div><br></div><div>I attached you a function to convert the theta/phi coordinates to xyz-coordinates you can use in FieldTrip (Written by Stephan Moratti @UCM).</div><div>To actually use the result, you need to build an electrode structure, so do something like this:</div><div><br></div><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; ">cap=importdata(<span style="color: #2832cf">'128_channel_easycap.elp'</span>); % Import the Vendor-Provided <span style="color: #2832cf">3</span>d Positions</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; min-height: 13px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; ">%% Step <span style="color: #2832cf">2.1</span>. Make an electrode file</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; min-height: 13px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; ">elec.pnt=elp2coor(cap.data<span style="color: #2832cf">',100)'</span>;</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; ">elec.label=cap.textdata;</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; min-height: 13px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; ">%% Check the positiosn on the head surface. They don<span style="color: #2832cf">'t look good, do they?</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; color: rgb(40, 50, 207); min-height: 13px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; color: rgb(40, 50, 207); "> figure</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; color: rgb(40, 50, 207); "> triplot(vol.bnd(1).pnt, vol.bnd(1).tri, [], '<span style="color: #000000">edges</span>');</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; color: rgb(40, 50, 207); "> hold</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; color: rgb(40, 50, 207); "> plot3(elec.pnt(:,1),elec.pnt(:,2),elec.pnt(:,3),'<span style="color: #000000">r*</span>')</div><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #2832cf; min-height: 13.0px"> <br class="webkit-block-placeholder"></p><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; color: rgb(40, 50, 207); ">%% Step 3 Move the electrodes to match the head</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; color: rgb(40, 50, 207); min-height: 13px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; color: rgb(40, 50, 207); "> cfg=[];</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; color: rgb(40, 50, 207); "> cfg.method='<span style="color: #000000">interactive</span>';</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; color: rgb(40, 50, 207); "> cfg.elec=elec;</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; color: rgb(40, 50, 207); "> cfg.headshape=vol.bnd(1);</div><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #2832cf; min-height: 13.0px"> <br class="webkit-block-placeholder"></p><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; color: rgb(40, 50, 207); "> elec_new=ft_electroderealign(cfg);</div><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #2832cf; min-height: 13.0px"> </p></div><div>Good luck,</div><div><br></div><div>Julian</div><div><br></div><div><br></div><div></div></body></html>