我的M文件如下： I0+w czW,^
function [G5]=fun(x); $'YKB8C
syms n1 n2 k1 k2 d; 1D p @n
[subwave,nsub]=textread('subout.txt','%f %f'); f~ nt!$
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); V9u\;5oL
[p,q]=size(subwave); f&|A[i>g
for j=1:p; /I'u/{KB
wavel(j)=subwave(j,1); cvE.r330|
n(j)=n1+n2/((wavel(j))^2); > '
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k(j)=k1*exp(k2/wavel(j)); X|E+K
N(j)=n(j)-i*k(j); cO+Xzd;838
phase(j)=2*pi*N(j)*d/wavel(j); _iJXp0g
ns(j)=nsub(j,1); dyiEK)$h
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); ^7 bf8 ^`
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); $?J+dB
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); [C j)@OC
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; t-*|Hfp*^
t1(j)=ts(j)*T(j); 3*$9G)Ey
tf(j)=filmtran(j,1)/100; rjHIQC C
difference(j)=(t1(j)-tf(j))^2; a,*p_:~i
end %M# ?cmt
G=symsum(difference(j),1,401); <o!&Kk 9
G1=subs(G,n1,sym('x(1)')); Nv?-*& L
G2=subs(G1,n2,sym('x(2)')); ' &:1?i)
G3=subs(G2,k1,sym('x(3)')); MiH}VfI
G4=subs(G3,k2,sym('x(4)')); q7f;ZK= f
G5=subs(G4,d,sym('x(5)')); DwmU fZp
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在matlab下运行 +6hl@Fm(
>> options=optimset('tolfun',1e-8,'tolx',1e-8); qJ+52U|z
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); -9>L vLU
g(1B W#$
yvd
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结果出错如下： ur<eew@8@i
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??? Conversion to double from sym is not possible. % 7 v@n+Q
Error in ==> fminsearch at 175 6L,lq;
fv(:,1) = funfcn(x,varargin{:}); 9Ue7
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哪位高手给看看 yw.~trF&%
