我的M文件如下： ydBoZ3 }
function [G5]=fun(x); x OZ?zN
syms n1 n2 k1 k2 d; RJ@ d_~%U
[subwave,nsub]=textread('subout.txt','%f %f'); =<FFFoF*C_
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); 3 }XUYF;
[p,q]=size(subwave); lK}F>6^\
for j=1:p; d~YDg{H
wavel(j)=subwave(j,1); "j~=YW+l
n(j)=n1+n2/((wavel(j))^2); 1{" e'[ L
k(j)=k1*exp(k2/wavel(j)); 3A'd7FJ0G
N(j)=n(j)-i*k(j); K\o!
phase(j)=2*pi*N(j)*d/wavel(j); jL cW;7OAC
ns(j)=nsub(j,1); I:='LH,
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); dpTap<Noby
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); E7y<iaA{~
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); }1'C !]j
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; ^${-^w@,%V
t1(j)=ts(j)*T(j); %#"uK :(N
tf(j)=filmtran(j,1)/100; .lRO; D
difference(j)=(t1(j)-tf(j))^2; Lt=#tu&d
end U4 M!RdG
G=symsum(difference(j),1,401); Q x$Yj
G1=subs(G,n1,sym('x(1)')); ~ /
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G2=subs(G1,n2,sym('x(2)')); G+}|gG8
G3=subs(G2,k1,sym('x(3)')); A2F+$N
G4=subs(G3,k2,sym('x(4)')); V .$<
G5=subs(G4,d,sym('x(5)')); ,7tN&R_
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在matlab下运行 `} Q+:
>> options=optimset('tolfun',1e-8,'tolx',1e-8); e>"{nOY4
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); HOXqIZN85
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结果出错如下： )%WS(S>8
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??? Conversion to double from sym is not possible. Qz[~{-<
Error in ==> fminsearch at 175 0=7C-A1(D
fv(:,1) = funfcn(x,varargin{:}); wGAN"K:e
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哪位高手给看看 Ow mI*`
