我的M文件如下： F$DA/ {.D
function [G5]=fun(x); 6FN GyvBU
syms n1 n2 k1 k2 d; e2v`
[subwave,nsub]=textread('subout.txt','%f %f'); =T D KU
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); W]#w4Fp!
[p,q]=size(subwave); {QM rgyQ E
for j=1:p; uUg ;v/:
wavel(j)=subwave(j,1); t*9 gusmG
n(j)=n1+n2/((wavel(j))^2); #?Kw
y
k(j)=k1*exp(k2/wavel(j)); !Pw*p *z
N(j)=n(j)-i*k(j); CyR` &u
phase(j)=2*pi*N(j)*d/wavel(j); :-}K:ucaj
ns(j)=nsub(j,1); 5PO_qr= Hx
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); B;ek a[xU
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); )][U6 e
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); q@~g.AMCB
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; ]5jS6 @Vl*
t1(j)=ts(j)*T(j); Q3ty K{JE
tf(j)=filmtran(j,1)/100; U@NCN2 I
difference(j)=(t1(j)-tf(j))^2; q4[8\Ua
end ]B,tCBt
G=symsum(difference(j),1,401); h40;Q<D
G1=subs(G,n1,sym('x(1)')); Cu8mN B{H
G2=subs(G1,n2,sym('x(2)')); +#MXeUX"
G3=subs(G2,k1,sym('x(3)')); gMI%!Y
G4=subs(G3,k2,sym('x(4)')); #zTy7ZS,0
G5=subs(G4,d,sym('x(5)')); n#g_)\
Q"dq_8\`U
&Gjpc>d
yuZLs H
在matlab下运行 UqI #F
>> options=optimset('tolfun',1e-8,'tolx',1e-8); (M$0'BV0
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); OW@%H;b
_# sy
- *'
?D@l
结果出错如下： 6p4BsWPx
YSeH;<'
??? Conversion to double from sym is not possible. &^"Ru?MK
Error in ==> fminsearch at 175 D_d>A+
fv(:,1) = funfcn(x,varargin{:}); QMBT8x/+_'
Mwnr4$]
哪位高手给看看 Mpojabsh
