我的M文件如下： o0nd ]"q?
function [G5]=fun(x); jWk1FQte
syms n1 n2 k1 k2 d; wb~B Y
[subwave,nsub]=textread('subout.txt','%f %f'); ? cU9~=
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); @v &h r
[p,q]=size(subwave); K}7E;O5m"
for j=1:p; l# u$w&
wavel(j)=subwave(j,1); r(WR= D{
n(j)=n1+n2/((wavel(j))^2); ?D ?_D,"C
k(j)=k1*exp(k2/wavel(j)); mh&wvT<:{
N(j)=n(j)-i*k(j); a!rU+ h iC
phase(j)=2*pi*N(j)*d/wavel(j); Em8q1P$tm>
ns(j)=nsub(j,1); R5OP=Q 8
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); Z./$}tVUG
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); ?5'E P|<
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); -yyim;Nj
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; Bv-|#sdxm
t1(j)=ts(j)*T(j); iQs^2z#Bd
tf(j)=filmtran(j,1)/100; Sd[%$)scC
difference(j)=(t1(j)-tf(j))^2; i2.g}pM.A
end LF6PKS
G=symsum(difference(j),1,401); ^#-d^ )f;
G1=subs(G,n1,sym('x(1)')); y2Eq-I e
G2=subs(G1,n2,sym('x(2)')); ; '6`hZ
G3=subs(G2,k1,sym('x(3)')); 9~3;upWu!
G4=subs(G3,k2,sym('x(4)')); s4V-brCM$|
G5=subs(G4,d,sym('x(5)')); 6!F@?3qCyg
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在matlab下运行 K|^PHe
>> options=optimset('tolfun',1e-8,'tolx',1e-8); j'L/eps?S
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); U'4 j+vUc
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l$[7 pM[
结果出错如下： >- S? rXO
/Z3 Mlm{
??? Conversion to double from sym is not possible. 6g fn5G
Error in ==> fminsearch at 175 Uk1|y\
fv(:,1) = funfcn(x,varargin{:}); P" -*'q,9
Q]h.{nN#PK
哪位高手给看看 xA7>";sla[
