我的M文件如下： skXzck
function [G5]=fun(x); nGwon8&]]
syms n1 n2 k1 k2 d; ur E7ZKdI
[subwave,nsub]=textread('subout.txt','%f %f'); dGj0;3FI%
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); +8W5amk.P|
[p,q]=size(subwave); 2D:,(
for j=1:p; w >%^pO~}`
wavel(j)=subwave(j,1); pacD7'1{
n(j)=n1+n2/((wavel(j))^2); S>b
3_D
k(j)=k1*exp(k2/wavel(j)); ; w+
N(j)=n(j)-i*k(j); ]%I\FefT
phase(j)=2*pi*N(j)*d/wavel(j); #>H Y+ ;
ns(j)=nsub(j,1); J+Fev.9>
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); F Z RnIg
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); @U3z@v]s(h
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); 6`iYIXnz
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; 8ki3>"!A
t1(j)=ts(j)*T(j); b%*`}B
tf(j)=filmtran(j,1)/100; u,nn\>Y
difference(j)=(t1(j)-tf(j))^2;
qo u\4YZ
end r73W. &
G=symsum(difference(j),1,401); 3s| :7
G1=subs(G,n1,sym('x(1)')); OiXO <1'$
G2=subs(G1,n2,sym('x(2)')); +} 1zw<
G3=subs(G2,k1,sym('x(3)')); >itNa.K
G4=subs(G3,k2,sym('x(4)')); { `Z~T&}~T
G5=subs(G4,d,sym('x(5)')); -"S94<Y
DA iS|x
!s^XWsb8
5-ED\ -
在matlab下运行 5M~+F"Hl
>> options=optimset('tolfun',1e-8,'tolx',1e-8); 4X*U~}
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); %'i_iF 8.
CbW[_\
1 <Mb@t
结果出错如下： IY8<^Q']
~OsLbz:
??? Conversion to double from sym is not possible. :*h1ik4t
Error in ==> fminsearch at 175 F!g1.49""
fv(:,1) = funfcn(x,varargin{:}); i$p2am8f
RM,aG}6M)M
哪位高手给看看 fMUh\u3
