function [ x, y ] = get_max_val( X, Y, x1, x2 )
%GET_MAX_VAL Summary of this function goes here
%   Detailed explanation goes here

len = size(X);
y = -11111111;
for k = 1:1:len-1
    
    if (x1 <= X(k)) && (x2 >= X(k) && ( Y(k)>(y) ) ) 
        x = X(k);
        y = (Y(k));
    end
end

end