function [y,z] = inter(y,z);
%INTER	 Interchange two vectors 
%[y,z] = inter(y,z) interchanges two vectors y and z
%so that on output y contains z and z contains y.
%input  : Vectors y and z
%output : Vectors y and z

        c = y ;
        y = z;
        z = c;
        

        
        end;