我的M文件如下： Z'<=06
function [G5]=fun(x); wlBdA
syms n1 n2 k1 k2 d; z~+_sTu
[subwave,nsub]=textread('subout.txt','%f %f'); qO[6?q=c:
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); yAR'' >
[p,q]=size(subwave); DzO0V"+H}k
for j=1:p; o+`W
wavel(j)=subwave(j,1); U 2/H,D
n(j)=n1+n2/((wavel(j))^2); DSYtj} >
k(j)=k1*exp(k2/wavel(j)); b|n%l5
1
N(j)=n(j)-i*k(j); \bqNjlu
phase(j)=2*pi*N(j)*d/wavel(j); % ~J90a
ns(j)=nsub(j,1); REB8_ H"
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); W"A Whi{h
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); $&EZVZ{r
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); !0c7nzjm
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; l!Z >QE`.S
t1(j)=ts(j)*T(j); >},O_qx
tf(j)=filmtran(j,1)/100; >k* QkIyq
difference(j)=(t1(j)-tf(j))^2; ch1EF/"
end ?*K;+@EH
G=symsum(difference(j),1,401); c%>t(ce`Tl
G1=subs(G,n1,sym('x(1)')); /#20`;~F)
G2=subs(G1,n2,sym('x(2)')); xO9,,w47
G3=subs(G2,k1,sym('x(3)')); ,~ X^8oY
G4=subs(G3,k2,sym('x(4)')); fW!~*Q
G5=subs(G4,d,sym('x(5)')); E,shTh%&~
hUSr1jlA
%bZ3^ ub}t
,[,+ _A
在matlab下运行 3%{XJV
>> options=optimset('tolfun',1e-8,'tolx',1e-8); zOLt)2-<
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); {F6hx9?
D@^ r
DG O_fR5L
结果出错如下： z[0L?~$
}/x `w
??? Conversion to double from sym is not possible. ,8;;#XR3
Error in ==> fminsearch at 175 %((F} 9_6
fv(:,1) = funfcn(x,varargin{:}); a N ). G1
}(Nb]_H
哪位高手给看看 yb*SD!
