我的M文件如下：
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function [G5]=fun(x); JK 4 @
syms n1 n2 k1 k2 d; Gj=il-Po
[subwave,nsub]=textread('subout.txt','%f %f'); srL,9)O C
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); )Pq.kn{Sp
[p,q]=size(subwave); R 9(^CWs
for j=1:p; P6Ei!t,>
wavel(j)=subwave(j,1); }_ E
n(j)=n1+n2/((wavel(j))^2); Wm 61
k(j)=k1*exp(k2/wavel(j)); ;G$FLL1
N(j)=n(j)-i*k(j); dkjL;1
phase(j)=2*pi*N(j)*d/wavel(j); 3$Je, |bs
ns(j)=nsub(j,1); R<-KXT9
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); h.nz kp5
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); \GWC5R7Q0j
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); %:lQ ~yn
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; e
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t1(j)=ts(j)*T(j); L6T_&AiL$
tf(j)=filmtran(j,1)/100; 8Ex0[ e
difference(j)=(t1(j)-tf(j))^2; 5zU$_ M
end -UO$$)Q
G=symsum(difference(j),1,401); *h Ur E
G1=subs(G,n1,sym('x(1)')); y}A-o_u@cD
G2=subs(G1,n2,sym('x(2)')); RaAq>B
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G3=subs(G2,k1,sym('x(3)')); rAWBuEU;!
G4=subs(G3,k2,sym('x(4)')); 5gGr|d|(
G5=subs(G4,d,sym('x(5)')); gIeo7>u
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在matlab下运行 xfb%bkr
>> options=optimset('tolfun',1e-8,'tolx',1e-8); lG2){){j
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); Ks4TBi&J
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p~t $ll0s
结果出错如下： Mvux=Ws
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??? Conversion to double from sym is not possible. '2NeuK -KD
Error in ==> fminsearch at 175 YV+e];s
fv(:,1) = funfcn(x,varargin{:}); g&
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哪位高手给看看 X:YxsZQ 5Y
