我的M文件如下： Uv /?/;si
function [G5]=fun(x); sr,8Qd 0M
syms n1 n2 k1 k2 d; 'x\{sv
[subwave,nsub]=textread('subout.txt','%f %f'); J"RmV@|
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); <)9 E .h
[p,q]=size(subwave); R a?0jcSQ$
for j=1:p; Q" an6ht|
wavel(j)=subwave(j,1); ~ f>km|Q{u
n(j)=n1+n2/((wavel(j))^2); H;eOrX {GT
k(j)=k1*exp(k2/wavel(j)); 9 l9|w4YJs
N(j)=n(j)-i*k(j); Z vO,1B
phase(j)=2*pi*N(j)*d/wavel(j); 5;-?qcb^w
ns(j)=nsub(j,1); CpF&Vy K
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); o8lwwM*
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); %
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T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); \?.Tq24
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; wNm~H
t1(j)=ts(j)*T(j); _-g? 6q
tf(j)=filmtran(j,1)/100; /SZg34%
difference(j)=(t1(j)-tf(j))^2; 0FD+iID
end Nt 'u; 0
G=symsum(difference(j),1,401); X>y6-%@
G1=subs(G,n1,sym('x(1)')); gcf EJN4'
G2=subs(G1,n2,sym('x(2)')); |CFTOe\ q
G3=subs(G2,k1,sym('x(3)')); uEKa
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G4=subs(G3,k2,sym('x(4)')); j8Csnm0
G5=subs(G4,d,sym('x(5)')); wsNM'~(
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在matlab下运行 p94 w0_m@|
>> options=optimset('tolfun',1e-8,'tolx',1e-8); p #95Q
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); "ewB4F[
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结果出错如下： h0fbc;l
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??? Conversion to double from sym is not possible. "~lGSWcU
Error in ==> fminsearch at 175 G}b LWA
fv(:,1) = funfcn(x,varargin{:}); *Q8d &$ ^
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哪位高手给看看 a _0G4@=T
