this is probably somewhere in this forum’s history but I can’t seem to find it.
My problem is the following: I have two tensors containing each a list of 3D points, one is S of size (81,3) and the other P of size (20000, 3). What I’d like to do is to compute the “displacement” vectors D = S-P between every 3D point in P to every 3D point in S. So the resulting D vector would have dimensions (20000, 81, 3), i.e for every point in P there are 81 displacements.
Does anyone know how to do this efficiently in pytorch?
Thanks in advance!