我的M文件如下： j9U%7u]- k
function [G5]=fun(x); 70Yjv 1 i
syms n1 n2 k1 k2 d; hv$m4,0WB
[subwave,nsub]=textread('subout.txt','%f %f'); %77p5ctW
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); 1b>C<\
[p,q]=size(subwave); ph|ZG6:
for j=1:p; >A q870n
wavel(j)=subwave(j,1); ,chf~-d
n(j)=n1+n2/((wavel(j))^2); lhYn5d)DV
k(j)=k1*exp(k2/wavel(j)); !epgTN
N(j)=n(j)-i*k(j); o{kbc5_
phase(j)=2*pi*N(j)*d/wavel(j); asgF1?r
ns(j)=nsub(j,1); {8EW)4Hf
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); 4^' 3&vu
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); T \# *S0^
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); ;C/bJEgdd
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; PS" .R_"
t1(j)=ts(j)*T(j); ] 43bere
tf(j)=filmtran(j,1)/100; "$5\,
difference(j)=(t1(j)-tf(j))^2; JH]K/sC >
end Lx U= {Y0
G=symsum(difference(j),1,401); rspayO<]3
G1=subs(G,n1,sym('x(1)')); "?Ge bA
G2=subs(G1,n2,sym('x(2)')); OAZ#|U
G3=subs(G2,k1,sym('x(3)')); [r OaM$3|
G4=subs(G3,k2,sym('x(4)')); 0i8h I6d
G5=subs(G4,d,sym('x(5)')); 6Bm9?eU0
X7|.T0{=x
DV]7.Bm
+ f;CyMEp
在matlab下运行 HT_TP q
>> options=optimset('tolfun',1e-8,'tolx',1e-8); N(3R |Ii
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); Ei @M$Fd
z&$/EP-
@gBE{)Fj
结果出错如下： {sv{847V
A~{f/%8D
??? Conversion to double from sym is not possible. :H[\;Z1_
Error in ==> fminsearch at 175 <<|H=![
fv(:,1) = funfcn(x,varargin{:}); ) 06iV
9<]a!:!^
哪位高手给看看 lZt(&^T
