Box's Evolutionary algorithm

Solves multivariable unconstrained optimization

function used in the script
% Function of Box's evolutionary Optimization Method
function fval = evolutionfun(x)
x1 = x(1);
x2 = x(2);


fval = ((x1.^2+ x2 -11).^2 + (x1 + x2.^2-7).^2) ; % enter your function here
end
% save this function in the same place as the script file