fitness_function.m

一个非常好的遗传算法参考程序,可以优化带约束条件的函数.

function fitness=fitness_function(a,b)
%Fitness_function Function is an example function Of Simple Genetic Algorithm Program (Version 1.0.0.1 )
%Support multi-dimesion parameters
%By chen yi ,CQU .QQ:2376635  Email:[e-mail]  (April,19th,2002)
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
%Attention :fitness_function(x) is a single value function
%and it is a standard function of m-function-file
%
% this is only an example of fitness_function ,you can give your own
% fitness_function as you wish.
%
% See Also DECODING ,CODING,SELECTION ,CROSSOVER,MUTATION,FITNESS,
%          SGA
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


fitness=0.5-(sin(sqrt(a^2+b^2))^2-0.5)/((1+0.001*(a^2+b^2))^2);
%end of fitness_function