Question

初学matlab 一个小程序，折磨我一天了，也不知道应该怎么改。求高手帮忙

主程序：
clear all;clc
syms C1 C2 C3
x=[C1 C2 C3];

for i=1:5
Y(i)=1*C1*i+2*C2*i+3*C3*i;
end

Y1=Y';
b=[4;5;6;7;8];
yo=Y1-b;
options=gaoptimset('PopulationSize',500,'Generations',1000,'StallGenLimit',1000,'TolFun',1e-1000);
[x,fval]=ga(@(x)ga_equation_group(x,yo),3,options)

自定义函数：
function f=ga_equation_group(x,yo)
n=length(yo);
for i=1:n
d(i)=yo(i);
end
f=sum(d.^2);
??? The following error occurred converting from sym to double:
Error using ==> mupadmex
Error in MuPAD command: DOUBLE cannot convert the input expression into a double array.

If the input expression contains a symbolic variable, use the VPA function instead.

Error in ==> fcnvectorizer at 14
y(i,:) = feval(fun,(pop(i,:)));

Error in ==> makeState at 47
Score =
fcnvectorizer(state.Population(initScoreProvided+1:end,:),FitnessFcn,1,options.SerialUserFcn);

Error in ==> gaunc at 41
state = makeState(GenomeLength,FitnessFcn,Iterate,output.problemtype,options);

Error in ==> ga at 291
[x,fval,exitFlag,output,population,scores] = gaunc(FitnessFcn,nvars, ...

Error in ==> bianjiayichuan at 14
[x,fval]=ga(@(x)ga_equation_group(x,yo),3,options)

Caused by:
Failure in user-supplied fitness function evaluation. GA cannot continue.
错误
一堆啊，哪位英雄救救我吧

Answer 1

你这代码写的乱七八糟的，不知道你要干嘛
你把你要做的规划写出来，不方便写就截图

追问

就是要编一个解非线性方程组的遗传算法程序 超定方程
我只是实验找点简单的数 可是还是一堆错误

追答

function f=fun(x)
y=1:5;
y=([x(1) x(2) x(3)]*[y;2*y;3*y])'-y'-3;
f=sum(y.^2);
%%%%%%%%%%%%%%%%
主程序
clear all;clc
[x,val]=ga(@fun,3)

其实这种问题一般不用遗传算法