Failure in initial objective function evaluation. FMINCON cannot continue

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NooshinY
NooshinY 2018 年 11 月 19 日
コメント済み: dpb 2018 年 11 月 19 日
I want to find the minimum of cost rate in the following code, but I get error.
%%%%%%%%%%%%%%%%%%% optimization part%%%%%%%%%%
x0=[10,10,2]; % Starting guess
lb=[1,1,1];
ub=[30,30,4];
%options=optimset('outputfcn',@outfun,'Largescale','off','Algorithm','interior-point','Display','iter','Tolx',1e-15,'Tolfun',1e-16,'MaxFunEvals',600,'MaxIter',100);
options = optimoptions('fmincon','Display','iter-detailed','Algorithm','interior-point','PlotFcn',{@optimplotx,...
@optimplotfval,@optimplotfirstorderopt},'Tolx',1e-10,'Tolfun',1e-4,'MaxFunEvals',600,'MaxIter',100);
[x,fval,exitflag,output]=fmincon(@optim,x0,[],[],[],[],lb,ub,[],options)
function fq=optim(x)
clc;
clear all;
format compact;
alpha1=5; beta1=0.8;
alpha2=1; beta2=4;
CI=58; CR=2000; CP=1000;
T=20; % time horizon
H=30; % failure threshold
N=1000; % number of observation
M=2; % number of units
p=T/N; t=(0:p:T);
g=zeros(M,N+1); G=zeros(M,N+1);
for i=1:N
g(1,i)=gamrnd(alpha1*p,beta1);
G(1,i+1)=G(1,i)+g(1,i);
g(2,i)=gamrnd(alpha2*p,beta2);
G(2,i+1)=G(2,i)+g(2,i);
end
Inspection=2;
tau=Inspection*(1000/20);
u1=G(1,tau)
u2=G(2,tau)
if u1<x(1)
if u2<x(2)
%x(1) is for H2 component 1, X(2) is for H2 component 2, and X(3) is for
totalcost=(CI+CR*norep(x(1),x(2),x(3),u1,u2)+CP*(downtime(x(3),u1,u2)))/x(3);
fq=totalcost;
else
u2=0;
totalcost=(CI+CR*norep(x(1),x(2),x(3),u1,u2)+CP*(downtime(x(3),u1,u2)))/x(3);
fq=totalcost;
end
u1=0;
u2=0;
totalcost=(CI+CR*norep(x(1),x(2),x(3),u1,u2)+CP*(downtime(x(3),u1,u2)))/x(3);
fq=totalcost;
end
end
In my code downtime and norep is a defined function. I will get the following error.
Reference to a cleared variable x.
Error in model>optim (line 35)
if u1<x(1)
Error in fmincon (line 536)
initVals.f = feval(funfcn{3},X,varargin{:});
Error in model (line 10)
[x,fval,exitflag,output]=fmincon(@optim,x0,[],[],[],[],lb,ub,[],options)
Caused by:
Failure in initial objective function evaluation. FMINCON cannot continue.
  1 件のコメント
dpb
dpb 2018 年 11 月 19 日
Your function contains...
function fq=optim(x)
clc;
clear all;
which just wiped out x that you passed it.
There is absolutely no reason for either of those in any function, start by deleting those and then test your function itself first.

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