我的M文件如下： l ^d[EL+
function [G5]=fun(x); -QyhwG =
syms n1 n2 k1 k2 d; 4 O:W#bx
[subwave,nsub]=textread('subout.txt','%f %f'); ~V/?H!r'{}
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); t6BHGX {o
[p,q]=size(subwave); <" @zn
for j=1:p; H"Klj_<dH0
wavel(j)=subwave(j,1); yQ3OL#
n(j)=n1+n2/((wavel(j))^2); +kq'+ Y7
k(j)=k1*exp(k2/wavel(j)); .))v0
N(j)=n(j)-i*k(j); /XudV2P-CA
phase(j)=2*pi*N(j)*d/wavel(j); t+?P^Ok
ns(j)=nsub(j,1); LTJc,3\,
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j);
t8+_/BXv
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); ,-+"^>
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); OEPa |rb
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; BS&;n
t1(j)=ts(j)*T(j); 'TTUN=y
tf(j)=filmtran(j,1)/100; +[ J/Zw0{
difference(j)=(t1(j)-tf(j))^2; R.LL#u};
end w_ {,<[#
G=symsum(difference(j),1,401); A:y.s;<L 0
G1=subs(G,n1,sym('x(1)')); 2Bk$ lx7
G2=subs(G1,n2,sym('x(2)')); v|ox!0:#
G3=subs(G2,k1,sym('x(3)')); Bm\q xQ
G4=subs(G3,k2,sym('x(4)')); *_ +7ni
G5=subs(G4,d,sym('x(5)')); )RYG %
= pA
IvU
~^ ^ NHq
mR8W]'gl.L
在matlab下运行 ](eN@Xi&@
>> options=optimset('tolfun',1e-8,'tolx',1e-8); =`Y.=RL+'n
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); s4 %(>Q
\([ WH!7
b dJ+@r
结果出错如下： mp~ {W
?R-9W+U %f
??? Conversion to double from sym is not possible. -[OXSaf6
Error in ==> fminsearch at 175 ]NhS=3*i+
fv(:,1) = funfcn(x,varargin{:}); VD4C::J
;WT{|z
哪位高手给看看 I
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