Error Using kd_nclosestpoint

Hello All,

Can anybody please help me? I am running the method function [index_vals,dist_vals,vector_vals] = kd_nclosestpoints(tree,point,n,first_iter_flag) in matlab.But the procedure is giving me an error in the line:- if(strcmp(tree.type,'leaf')) index_vals=tree.index; dist_vals=sqrt(sum((tree.centroid-point).^2)); vector_vals=tree.centroid; return; end The error is:- undefined symbol "centroid-point" and "centroid". Can anybody upload the correct routine or any help in this is appreciated. Thanks, Ampi