我的M文件如下： s~m]>^?8MR
function [G5]=fun(x); F+]cFx,/
syms n1 n2 k1 k2 d; Dqc2;>
[subwave,nsub]=textread('subout.txt','%f %f'); B%WkM\\!^
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); T0@$6&b%\z
[p,q]=size(subwave); A*{CT>
for j=1:p; 2;x+#D8
wavel(j)=subwave(j,1); Nj.;mr<
n(j)=n1+n2/((wavel(j))^2); eVzZfB-=4}
k(j)=k1*exp(k2/wavel(j)); /@1pm/>ZaN
N(j)=n(j)-i*k(j); LvMA('4
phase(j)=2*pi*N(j)*d/wavel(j); {(l,Uhxl""
ns(j)=nsub(j,1); MvTp%d.
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); V0G[f}tm'
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); 8H ,k0~D
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); ?1**@E0
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; : m<#\!?
t1(j)=ts(j)*T(j); + (Jh $b_
tf(j)=filmtran(j,1)/100; T@Z-;^aV
difference(j)=(t1(j)-tf(j))^2; `i!fg\qnK
end T_d)1m fl
G=symsum(difference(j),1,401); J(SGa Hm@
G1=subs(G,n1,sym('x(1)')); wlEK"kKU
G2=subs(G1,n2,sym('x(2)')); aoBi N_
G3=subs(G2,k1,sym('x(3)')); _Nh`-R%B)
G4=subs(G3,k2,sym('x(4)')); 6(>,qt,9S
G5=subs(G4,d,sym('x(5)')); =y=MljEX
(|pM^+
R7A:K]iJ5
6#Rco%07zI
在matlab下运行 +p$lVnAt
>> options=optimset('tolfun',1e-8,'tolx',1e-8); e|q~t
{=9S
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); K'y|_XsBB)
8~F?%!X
I]%Kd('
结果出错如下： hrGX65>
F\jawoO9
??? Conversion to double from sym is not possible. :x3xeVt Y
Error in ==> fminsearch at 175 :sttGXQX
fv(:,1) = funfcn(x,varargin{:}); S %e)br}
0lOR.}]q
哪位高手给看看 tO?-@Qf/9<
