To find the index of array using part of data but retaining actual indexing pattern

Hi

I am trying to create a index array for all points inside a convex hull shape , since the ponts array is too big - lot time is spent.

in = in_polyhedron(tri, xyz3D)

I am trying to search on the relavent index1 only, to save runtime.

in = in_polyhedron(tri, xyz3D(index1));

I cannot use a temperory array for xyz3D(index1) as I need to usethe xyz3D for doing interpolation and isovalue isosurface for 3D values. So the in - index array should get the same size as xyz3D array.

Could you tell me how to do in_polyhedron so that 'in' get back the origanl indexing - without having to search all points in xyz3D.

I tried using : xyz3D{index1}(in)= 1 , for points search results... but donot works

Answer 1

[Matt J]

in(index1) = in_polyhedron(tri, xyz3D(index1));

[sam l]

thanks ...