我的M文件如下： A+}4 N%kh
function [G5]=fun(x); NkJ^ecn%)
syms n1 n2 k1 k2 d; *AA1e}R{B
[subwave,nsub]=textread('subout.txt','%f %f'); tV,zz;* Oe
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); U^YPL,m1
[p,q]=size(subwave); g U%GM
for j=1:p; Y~:7l5C
wavel(j)=subwave(j,1); ""a8eB 6
n(j)=n1+n2/((wavel(j))^2); <'B^z0I,
k(j)=k1*exp(k2/wavel(j)); 1k~jVC2VA
N(j)=n(j)-i*k(j); <|_Ey)1
6
phase(j)=2*pi*N(j)*d/wavel(j); bc "N
ns(j)=nsub(j,1); ;8v5 qz
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); 2~4C5@SxL
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); oaK ~:'
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); 950b9Vn&
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; Rq9gtx8,=
t1(j)=ts(j)*T(j); :ox CF0Y
tf(j)=filmtran(j,1)/100; M@K[i*e
difference(j)=(t1(j)-tf(j))^2; NAU<?q<)
end p~b$+8#+
G=symsum(difference(j),1,401); Ii8jY_
G1=subs(G,n1,sym('x(1)')); o MA K[$k;
G2=subs(G1,n2,sym('x(2)')); {h=Ai[|l4Q
G3=subs(G2,k1,sym('x(3)')); p (8\w-6
G4=subs(G3,k2,sym('x(4)')); i*tj@5MY-
G5=subs(G4,d,sym('x(5)')); KJ~pY<a?
dWUu3
9x1Dyz 2?F
d]^ i1
在matlab下运行 8B+uNN~%]
>> options=optimset('tolfun',1e-8,'tolx',1e-8); k);!H +
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); )?WoL Ejq
8HOmWQS
IW#(ICeb
结果出错如下： ;:4puv+]
%xRS9A 4
??? Conversion to double from sym is not possible. S!]}}fKEFm
Error in ==> fminsearch at 175 9T1G/0k-
fv(:,1) = funfcn(x,varargin{:}); 7ou^wt+%
ZZ(@: F
哪位高手给看看 1:t>}[Y
