Asked by Layla
on 21 Mar 2014

Hi everyone,

I have 14 sets of 3D points where each set represents a sub-nucleus of a region in the brain. I'd like to do two things with this data:

1. Create volumes (not surfaces!) of each sub-nuclei data set

2. Plot all 14 volumes at once, and view (orthogonal) slices at whatever X-value (for YZ, or Sagittal Images), Y-value (for XZ, or Coronal Images), or Z-value (for XY, or Axial images) I choose.

So far, I've done this by generating Delaunay Triangulations, and changing the limits of the axes. However, the resulting plots are quite messy. I dislike being able to see the lines that show the triangles. The sub-nuclei are color-coded, so I'd rather not see any connectivity lines. Is there a cleaner, smoother way of doing this?

Thanks!

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Answer by Sean de Wolski
on 21 Mar 2014

Edited by Sean de Wolski
on 21 Mar 2014

Accepted answer

Well I can help you with the lines, set the *'edgecolor'* to *'none'*

[x,y] = meshgrid(1:15,1:15); tri = delaunay(x,y); z = peaks(15); h=trisurf(tri,x,y,z); set(h,'EdgeColor','none')

Sean de Wolski
on 26 Mar 2014

That really depends on your end goal. For just viewing it? Sure!

For more complicated analysis, I would probably first voxelize it and then work on it as a three dimensional image (at least to get started).

http://www.mathworks.com/matlabcentral/fileexchange/27390-mesh-voxelisation

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## 1 Comment

## Layla (view profile)

Direct link to this comment:http://www.mathworks.com/matlabcentral/answers/122618#comment_203462

I have edited the code for simplicity to demonstrate what I'm doing:

I've attached a picture of what the result looks like. It's messy. I wish I could get rid of the black lines! Maybe there's a different way of generating volumes out of this XYZ-coordinate data though?