Worked perfectly out of the box after compiling in MATLAB as specified by the docs. Thanks a lot!
One little thing: The help for kdtree_k_nearest_neighbors says that the neighbors are returned with increasing distance order. This seems to be incorrect, my experiments tell me they are returned in decreasing distance order (e.g. if the point itself is part of the tree, then it is returned as the last of the neighbors, not as the first).
