我的M文件如下： ` fE'$2
function [G5]=fun(x); 4( ,M&NC
syms n1 n2 k1 k2 d; <`?%Cz AO
[subwave,nsub]=textread('subout.txt','%f %f'); MY^o0N
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); [
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[p,q]=size(subwave); VB` % u=
for j=1:p; HBZ6 Pj
wavel(j)=subwave(j,1); /&9R*xNST#
n(j)=n1+n2/((wavel(j))^2); 3"sXN)j
k(j)=k1*exp(k2/wavel(j)); /.~zk(-&h
N(j)=n(j)-i*k(j); nb ?(zDJ8
phase(j)=2*pi*N(j)*d/wavel(j); v57<b&p26
ns(j)=nsub(j,1); Xc4zUEO9
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); < FY%QB)h
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); K & %8w
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); zN=s]b=/
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; ]^Xj!01~
t1(j)=ts(j)*T(j); >s )L(DHa"
tf(j)=filmtran(j,1)/100; !N!AO(Z
difference(j)=(t1(j)-tf(j))^2; li{!Jp5]1b
end 'rq@9$h1W
G=symsum(difference(j),1,401); lPrAx0m13%
G1=subs(G,n1,sym('x(1)')); /}
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G2=subs(G1,n2,sym('x(2)')); QKhGEW~G
G3=subs(G2,k1,sym('x(3)')); 0M?zotv0#
G4=subs(G3,k2,sym('x(4)')); :^-\KE` 3
G5=subs(G4,d,sym('x(5)')); 2H`> Kj
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在matlab下运行 c? KIHZ0
>> options=optimset('tolfun',1e-8,'tolx',1e-8); itg"dGDk
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); `5"3Cj"M
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x&"P^gh)
结果出错如下： wE N[o18{
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??? Conversion to double from sym is not possible. 3w"_Onwk
Error in ==> fminsearch at 175 ddbQFAQQQ
fv(:,1) = funfcn(x,varargin{:}); NNwGRoDco
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哪位高手给看看 oKH+Q6S:
