clc
clear
%%遺傳算法的參數(shù)
maxgen=100;????????????%迭代次數(shù)
sizepop=20;????????????%種群規(guī)模
pcross=0.7;????????????%交叉概率
pmutation=0.02;????????%變異概率
%%初始化種群
[xy]=meshgrid（[-2:2]）;
len1=1;
len2=1;
len=len1+len2;
D=2;%有兩個(gè)變量
%隨機(jī)產(chǎn)生初始化種群，rand（）是產(chǎn)生0-1的隨機(jī)數(shù)
for?i=1:sizepop
?????population（i1）=rand（）*4-2;
?????population（i2）=rand（）*4-2;
end
bestfitness=[];
bestind=[];
%%迭代過(guò)程
for?k=1:maxgen
????%%計(jì)算適應(yīng)度
????for?i=1:sizepop
????????x=population（i1）;
????????y=population（i2）;
????????individual.fitness（i）=x*cos（2*pi*y）+y*sin（2*pi*x）;????????????%適應(yīng)度函數(shù)
????end
????%%
????sumfitness=sum（individual.fitness）;???%當(dāng)代種群適應(yīng)度之和
????for?i=1:sizepop
????????chooseproportion（i）=individual.fitness（i）/sumfitness;???%選擇概率
????end
????sumproportion（1）=chooseproportion（1）;???????????????????????