How to create a surface from node coordinates and face indexes?

I am trying to create a surface using surf() to represent a 3D geometry. The issue is that the nodes coordinates are stored in one array with three columns for x, y, and z each. Meanwhile I have the face indexes making up triangular faces stored in another array.

Previously I've written a script that transforms a surf geometry into a ply file, so in this case I am looking to somewhat reverse engineer that process.

Ultimately I need the surface to make a 3D countour plot.

Is there any way to achieve this with the node coordinate and face index information? Files containing such information are attached.

I believe I could plot each triangular surface individually but with 10k surffaces there might be a more efficient way to do this.

Answer 1

[Steven Lord]

Does the trimesh function do what you want?

Alternately take a look at the griddata function and then the isosurface or contour functions, since you mentioned your ultimate goal is to "make a 3D countour plot".