Why does 'paretosearch' function show an error here?
1 次查看(过去 30 天)
显示 更早的评论
I am getting an error : Unrecognized field name "nArchiveSize" , and I do not know how to fix it.
The 'optimoptions' is from plot-3-d-pareto-set.
'N3(x)' and 'N4(x)' are familer with 'N2(x)'.
function fa = N2(x)
u0=4*pi*1e-7;
eps0=1e-9/(36*pi);
fre = 0.9e9;
w = 2*pi*fre;
lamda = 3e8/fre;
k0 = w*sqrt(eps0*u0);
gamma1 = 0.63117783 - 1i*0.043092759;
gamma2 = gamma1*exp(2*1i*k0*lamda/4);
Zin1 = 376.99*(1 + gamma2)/(1 - gamma2);
x(:,6)=0;
d1 = x(:,1);
d2 = x(:,2);
d3 = x(:,3);
eps_r1 = x(:,4);
eps_r2 = x(:,5);
eps_r3 = x(:,6);
eps1 = eps_r1.*eps0;
eps2 = eps_r2.*eps0;
eps3 = eps_r3.*eps0;
k1 = w.*sqrt(eps1.*u0);
k2 = w.*sqrt(eps2.*u0);
k3 = w.*sqrt(eps3.*u0);
Z01 = sqrt(u0./eps1);
Z02 = sqrt(u0./eps2);
Z03 = sqrt(u0./eps3);
Zin2 = Z01.*(Zin1 + 1i.*Z01.*tan(k1.*d1))./(Z01 + 1i.*Zin1.*tan(k1.*d1));
Zin3 = Z02.*(Zin2 + 1i.*Z02.*tan(k2.*d2))./(Z02 + 1i.*Zin2.*tan(k2.*d2));
Zin4 = Z03.*(Zin3 + 1i.*Z03.*tan(k3.*d3))./(Z03 + 1i.*Zin3.*tan(k3.*d3));
gamma3 = (Zin4-377)./(Zin4+377);
aa = abs(imag(gamma3));
bb = abs(real(gamma3));
fa = aa+bb;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function F=fun(~)
F(1) = N2;
F(2) = N3;
F(3) = N4;
end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
clear
clc
fitnessfcn=@fun;
nvars=6;
lb=[0 0 0 1 1 1];
ub=[0.02 0.02 0.02 50 50 50];
A = [];
b = [];
Aeq=[];
beq=[];
options = optimoptions('paretosearch','UseVectorized',true,'ParetoSetSize',1,'PlotFcn','psplotparetof');
rng default
[x,fval]=paretosearch(fitnessfcn,nvars,A,b,Aeq,beq,lb,ub,[],options);
1 个评论
回答(1 个)
ag
2024-1-9
编辑:ag
2024-1-9
Hi Kefeng,
I understand that you are facing the error "Unrecognized field name: nArchiveSize" while using the "paretosearch" function.
Upon debugging your code, I found that the objective function "N2", returns "NaN" value, which causes the function "initialize"(called through "paretosearch") to exit early, without initializing all the required variables. Therreafter, when the "nArchiveSize" is being accessed inside "driver"(called through "paretosearch"), which was never initialized, it throws the error.
The below lines from the function "N2", are producing "NaN" values, because of the "divide by zero" problem.
Z01 = sqrt(u0./eps1);
Z02 = sqrt(u0./eps2);
Z03 = sqrt(u0./eps3);
Zin2 = Z01.*(Zin1 + 1i.*Z01.*tan(k1.*d1))./(Z01 + 1i.*Zin1.*tan(k1.*d1));
Zin3 = Z02.*(Zin2 + 1i.*Z02.*tan(k2.*d2))./(Z02 + 1i.*Zin2.*tan(k2.*d2));
Zin4 = Z03.*(Zin3 + 1i.*Z03.*tan(k3.*d3))./(Z03 + 1i.*Zin3.*tan(k3.*d3));
To fix this, modify the logic for "N2", to get rid of the "divide by zero" scenario.
Please refer to the following documentation, for more details on creating an objective function:
Hope this helps!
Best Regards,
Aryan Gupta
0 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Multiobjective Optimization 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!