<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear Ulrich<div><br></div><div>If your source locations are defined on a regular 3D grid that can be represented as volume, then the neighbours are trivial to find and you do not have to specify a structure for the neighbours. </div><div><br></div><div>If you have done source reconstruction on a 3D folded cortical sheet that is defined by a triangulated surface, then it is also possible to cluster along the surface. I don't know the details for the cortical sheet clustering from the top of my head, if you are interested please let me know and I'll look them up. </div><div><br></div><div>best</div><div>Robert</div><div><br></div><div><br></div><div><br></div><div><br><div><div>On 30 Jan 2012, at 16:58, Pomper, Ulrich 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; ">Dear Jörn,<br>Thanks for you reply. I did mean source-level, so like you said, I am trying to define the neighbouring voxels for each voxel.<br>As far as I understand, leaving cfg.neighbours blank means that the clustering is done over the time and frequency dimensions only, not over space.<span class="Apple-converted-space"> </span><br>The FT help reads:<span class="Apple-converted-space"> </span><br>%If you specify an empty neighbourhood structure, clustering will only be done in frequency and time (if available) and not over neighbouring channels.<br><br>Has anybody done clustering in source space using all three dimensions and could explain how this works?<br>Cheers,<span class="Apple-converted-space"> </span><br>Ulrich<br><br></span></blockquote></div><br></div></body></html>