Problem with Genetic algorithm fitness function

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mostafa
mostafa 2015-1-14
评论： mostafa 2015-1-14
Hi everybody I want to use genetic algorithm for optimizing 24 variable. The problem is this:
I implemented the code in this way:
if true
fitnessfunc=@fitness;
numberofvariables=24;
lb=zeros(1,24);
ub=[350 350 350 350 350 350 350 350 350 350 350 350 51 51 51 51 51 51 51 51 51 51 51 51];
[x,fval]=gamultiobj(@fitness,numberofvariables,[],[],[],[],lb,ub);
function C=fitness(Y)
x0=[3.2*10^5 10^10 0];
tspan=[0 350];
[t,y]=ode45(@(t,y) equations(t,y,Y),tspan,x0);
C=sum(y(:,2).^2)^2+y(350,2)^2+max(y(:,2))^2;
end
function dy = equations(t,y,glob)
%initial parameters value
dy = zeros(3,1);
s=1.3*10^4;
p=0.1245;
g=2.019*10^7;
m=3.422*10^(-10);
d=0.0412;
Mmax=50;
b=2.0*10^(-9);
a=0.18;
n=1.01*10^(-7);
Mth=10;
w=0.27;
o=0;
k=8.4*10^(-3);
time=glob(1:12);
u=glob(13:24);
delta=dirac(t-time)';
dose=u*delta;
%E=y1 , t=y2 , m=y3 landa=w
dy(1) = s+((p*y(1)*y(2))/(g+y(2)))-m*y(1)*y(2)-d*y(1)+o-k*((1-exp(-y(3)))*heaviside(y(3)-Mmax));
dy(2) = a*y(2)*(1-b*y(2))-n*y(1)*y(2)-k*((y(3)-Mth)*heaviside(y(3)-Mth));
dy(3) = dose-w*y(3);
end
end
I got the error. Is there any suggestion?
Thanks
  2 个评论
Alan Weiss
Alan Weiss 2015-1-14
Please give us the MATLAB result, I mean the exact error message.
Alan Weiss
MATLAB mathematical toolbox documentation
mostafa
mostafa 2015-1-14
if true
Attempted to access y(350,2); index out of bounds because size(y)=[137,3].
Error in fitness (line 5)
C=sum(y(:,2).^2)^2+y(350,2)^2+max(y(:,2))^2;
Error in createAnonymousFcn>@(x)fcn(x,FcnArgs{:}) (line 11)
fcn_handle = @(x) fcn(x,FcnArgs{:});
Error in fcnvectorizer (line 14)
y(i,:) = feval(fun,(pop(i,:)));
Error in gamultiobjMakeState (line 52)
Score =
fcnvectorizer(state.Population(initScoreProvided+1:end,:),FitnessFcn,numObj,option s.SerialUserFcn);
Error in gamultiobjsolve (line 11)
state = gamultiobjMakeState(GenomeLength,FitnessFcn,output.problemtype,options);
Error in gamultiobj (line 235)
[x,fval,exitFlag,output,population,scores] = gamultiobjsolve(FitnessFcn,nvars, ...
Error in muobga (line 6)
[x,fval]=gamultiobj(@fitness,numberofvariables,[],[],[],[],lb,ub);
Caused by:
Failure in user-supplied fitness function evaluation. GA cannot continue.
end

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