How do I make a surf plot in MATLAB with irregularly spaced data?

Question

I know I can create a 3D surface plot in MATLAB by doing:

x = linspace(1,10,100);
y = linspace(10,20,100);

[X Y] = meshgrid(x,y);

Z = X * Y;

surf(X,Y,Z);
         


        

Answer 1

Appologies, after some hunting I managed to answer my own question:

You can use the trisurf function:

tri = delaunay(x,y);
trisurf(tri,x,y,z);

If you have dense data you will want to do shading interp (or another value, check doc shading) so you don't get a black blob due to the grid.