我的M文件如下: W9?Vh{w
function [G5]=fun(x); @twClk.s
syms n1 n2 k1 k2 d; `|;R}"R;
[subwave,nsub]=textread('subout.txt','%f %f'); Y`3>i,S6\
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); 0zaE?dA]
[p,q]=size(subwave); wg*2mo
for j=1:p; 0Q=4{*:?
wavel(j)=subwave(j,1); l=ZhHON
n(j)=n1+n2/((wavel(j))^2); ]dc^@}1bN
k(j)=k1*exp(k2/wavel(j)); k9.2*+vvg
N(j)=n(j)-i*k(j); 0I4RZ.2*Y
phase(j)=2*pi*N(j)*d/wavel(j); s3W )hU)
ns(j)=nsub(j,1); Qj?FUxw
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); DGTSk9iK(
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); k#%BxT
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); mV}
peb
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; 2`Xy}9N/Y
t1(j)=ts(j)*T(j); x5k6yHn
tf(j)=filmtran(j,1)/100; ~&=-*
difference(j)=(t1(j)-tf(j))^2; #n7uw
end TDdFuO'}
G=symsum(difference(j),1,401); GH![rK
G1=subs(G,n1,sym('x(1)')); ";cWK29\f
G2=subs(G1,n2,sym('x(2)')); C$xU!9K[+
G3=subs(G2,k1,sym('x(3)')); *Y6BPFE*4
G4=subs(G3,k2,sym('x(4)')); GmB7@-[QA%
G5=subs(G4,d,sym('x(5)')); yK<%AV@v
52BlFBNV
{mMrD 5
impzqQlZ,
在matlab下运行 P7(+{d{
>> options=optimset('tolfun',1e-8,'tolx',1e-8); veg\A+:'
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); _H|x6X1-
vDz)q
T%Vii*?M
结果出错如下: HiEXw}Hkz
[L8Bgw1
??? Conversion to double from sym is not possible. !MNUp(:
Error in ==> fminsearch at 175 [>Kkj;*
fv(:,1) = funfcn(x,varargin{:}); xCD|UC46?X
E%
Ce/n
哪位高手给看看 W\o(f W