我的M文件如下： FZJ sZeO
function [G5]=fun(x); jb!15Vlt"
syms n1 n2 k1 k2 d; DE14dU
[subwave,nsub]=textread('subout.txt','%f %f'); 4-\gh a
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); 2S_7!|j
[p,q]=size(subwave); &^b mZj !
for j=1:p; soB5sFt&]
wavel(j)=subwave(j,1); !>QD42
n(j)=n1+n2/((wavel(j))^2); ~HyqHx y
k(j)=k1*exp(k2/wavel(j)); #p|7\Y
N(j)=n(j)-i*k(j); PQ`~qM:3st
phase(j)=2*pi*N(j)*d/wavel(j); v.e~m2u_F
ns(j)=nsub(j,1); 8j&LU,
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); ZNTOI]P&
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); ADVHi3b
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); <S` N9a
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; 8>~\R=SC
t1(j)=ts(j)*T(j); '?v- o)X
tf(j)=filmtran(j,1)/100; >KnXj7
difference(j)=(t1(j)-tf(j))^2; *D$Hd">X
end Z3Y( g
G=symsum(difference(j),1,401); BJI"Dr F
G1=subs(G,n1,sym('x(1)')); FaE,rzn)iD
G2=subs(G1,n2,sym('x(2)')); :=^_N}
G3=subs(G2,k1,sym('x(3)')); 9..! g:
G4=subs(G3,k2,sym('x(4)')); #MI4 `FZ
G5=subs(G4,d,sym('x(5)')); '6W|,
^# gR"\F`d
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在matlab下运行 IA?v[xu
>> options=optimset('tolfun',1e-8,'tolx',1e-8); _^" 0"< ,
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); S2EeC&-AR
x9B{|+tIoc
9Fv VM9
结果出错如下： mk&`dr
O!#bM< *
??? Conversion to double from sym is not possible. mtg3}etA
Error in ==> fminsearch at 175 o+T %n1$+V
fv(:,1) = funfcn(x,varargin{:}); d%='W|i\p&
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哪位高手给看看 (*\*7dIo
