我的M文件如下： UWV% y P
function [G5]=fun(x); o ^UOkxs.
syms n1 n2 k1 k2 d; fK+E5~vQ
[subwave,nsub]=textread('subout.txt','%f %f'); #!UJY%c ~
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); tm= ,x~
[p,q]=size(subwave); eUB!sR%
for j=1:p; ( Q%
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wavel(j)=subwave(j,1); h`N2M,
n(j)=n1+n2/((wavel(j))^2); md'wre3
k(j)=k1*exp(k2/wavel(j)); dEKu5GI
N(j)=n(j)-i*k(j); tNzO1BK
phase(j)=2*pi*N(j)*d/wavel(j); 7>O`UT<t4@
ns(j)=nsub(j,1); <Y?Z& rNb
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); a?r$E.W'&
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); l$9k:#\FD
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); zs
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ts(j)=1-((1-ns(j))/(1+ns(j)))^2; r1<*=Fs=>>
t1(j)=ts(j)*T(j); +<[ q"3
tf(j)=filmtran(j,1)/100; $Uy+]9
difference(j)=(t1(j)-tf(j))^2;
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end ROQ]sQpk
G=symsum(difference(j),1,401); j;_
G1=subs(G,n1,sym('x(1)')); +z?gf*G_W'
G2=subs(G1,n2,sym('x(2)')); U~7udUR
G3=subs(G2,k1,sym('x(3)')); ?VE'!DW
G4=subs(G3,k2,sym('x(4)')); A~a 3bCX+"
G5=subs(G4,d,sym('x(5)')); P*
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在matlab下运行 -sJD:G,%
>> options=optimset('tolfun',1e-8,'tolx',1e-8); +39uKOrZ
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); mL`8CO A
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结果出错如下： LS<+V+o2%
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??? Conversion to double from sym is not possible. oyd P}X
Error in ==> fminsearch at 175 ,>6a) 2xh
fv(:,1) = funfcn(x,varargin{:}); W9w(a:~hY
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哪位高手给看看 n)q8y0if
