function [ u0 ] = UINIT(x,y)
% 
% Written by:
% -- 
% John L. Weatherwax                2006-03-11
% 
% email: wax@alum.mit.edu
% 
% Please send comments and especially bug reports to the
% above email address.
% 
%-----
  
u0 = zeros(length(y),length(x));