我的M文件如下： yHOqzq56
function [G5]=fun(x); Gh+f1)\FA"
syms n1 n2 k1 k2 d; d?}hCo=/Xq
[subwave,nsub]=textread('subout.txt','%f %f'); `oXg<tivU
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); +7Rt {C,
[p,q]=size(subwave); A^L?_\e6
for j=1:p; ;sQ2 0 B'
wavel(j)=subwave(j,1); O!
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n(j)=n1+n2/((wavel(j))^2); hgwn> p:S#
k(j)=k1*exp(k2/wavel(j)); KBj@V6Q
N(j)=n(j)-i*k(j); 0%H24N
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phase(j)=2*pi*N(j)*d/wavel(j); |0]YA
ns(j)=nsub(j,1); U!NI_uk
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); ;-Ado8
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); 5p{25N_t
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); N'a?wBBR
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; 07Y_^d
t1(j)=ts(j)*T(j); ZQ|gt*
tf(j)=filmtran(j,1)/100; 9C=~1>S
difference(j)=(t1(j)-tf(j))^2; xD^w TtT
end C ( U
G=symsum(difference(j),1,401); f-&A TTx`J
G1=subs(G,n1,sym('x(1)')); J@gm@ jLc
G2=subs(G1,n2,sym('x(2)')); 1 yJ75/
G3=subs(G2,k1,sym('x(3)')); Bs@:rhDi
G4=subs(G3,k2,sym('x(4)')); +K&?)?/=
G5=subs(G4,d,sym('x(5)')); yZ|+VXO
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在matlab下运行 <OIUyZS
>> options=optimset('tolfun',1e-8,'tolx',1e-8); XJ O[[G`
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); LS{bg.e
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结果出错如下： y]7 %$*
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??? Conversion to double from sym is not possible. `ReGnT[
Error in ==> fminsearch at 175 &M$Bt} <
fv(:,1) = funfcn(x,varargin{:}); Enu!u~1]F
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哪位高手给看看 %6N)G!P
