function[m] = maxxy(x, y);

%
% function[m] = maxxy(x, y);
% -------------------------------------------------------------------
% 
% input: 	x,y - column vectors
% output:   m - a column vector of max values between corresponding xs and ys
%											when x(i) ~= y(i) and 0 otherwise				                       
% -------------------------------------------------------------------
% Maxim Likhachev


inputlength = size(x,1);

%check that the input is valid
if(size(x,1) ~= size(y,1) | size(x,2) ~= 1 | size(y,2) > 1)
   fprintf(1, 'ERROR: size of x should match the size of y or is invalid\n');
   return;
end;

%create output
m = zeros(size(x));

%iterate over inputs and assign output
for i = 1:inputlength
   if (x(i) > y(i))
      m(i) = x(i);
   elseif (x(i) == y(i))
      m(i) = 0;
   else
      m(i) = y(i);
   end;
end;