我的M文件如下： C
vOH* K'
function [G5]=fun(x); 9 ZD>_a
syms n1 n2 k1 k2 d; |e QwI&
[subwave,nsub]=textread('subout.txt','%f %f'); HZawB25{
[filmwave,filmtran]=textread('filmtr.dat','%f %f');
|F}6Zv
[p,q]=size(subwave); g mqL,H#
for j=1:p; |j2$ G~B6
wavel(j)=subwave(j,1); $etw' c0
n(j)=n1+n2/((wavel(j))^2); nk*T
x
k(j)=k1*exp(k2/wavel(j)); ]lqe ,>
N(j)=n(j)-i*k(j); MaS-*;BY,
phase(j)=2*pi*N(j)*d/wavel(j); ,q K'!
ns(j)=nsub(j,1); B*@0l:
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); 0Yk$f1g
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); ?3_^SRW&a
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); {3* Ne /
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; ,
3&D A
t1(j)=ts(j)*T(j); p
2>\
tf(j)=filmtran(j,1)/100; oypF0?!m
difference(j)=(t1(j)-tf(j))^2; 6/dP)"a('
end T;M4NGmvd
G=symsum(difference(j),1,401); gW Ib" l
G1=subs(G,n1,sym('x(1)')); |e_'% d&
G2=subs(G1,n2,sym('x(2)')); 'Q dDXw5o
G3=subs(G2,k1,sym('x(3)')); OTj
J'
G4=subs(G3,k2,sym('x(4)')); o.g)[$M8cF
G5=subs(G4,d,sym('x(5)')); LOEiV
3E-dhSz:i
[9C{ \t
iu iVr$E
在matlab下运行 gSk0#Jt
>> options=optimset('tolfun',1e-8,'tolx',1e-8); s?Z{LWZ@
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); `]I p`_{
Ew )1O9f
!Bj J5m
结果出错如下： cz41<SFL
!y&<I T(\4
??? Conversion to double from sym is not possible. NydF'N_1
Error in ==> fminsearch at 175 V4ybrUWK
fv(:,1) = funfcn(x,varargin{:}); Y#zHw< <E
f;%=S:3
哪位高手给看看 \'6% Ld5km
