[求助]fminsearch应用出错 [复制链接]

我的M文件如下： YXFUZ9a#e  
function [G5]=fun(x); r;~2NxMF/  
syms n1 n2 k1 k2 d; &3_S+.JO  
[subwave,nsub]=textread('subout.txt','%f %f'); usFhcU  
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); fxcCz 5  
[p,q]=size(subwave); A4|L;z/A[h  
for j=1:p; fRow@DI\  
    wavel(j)=subwave(j,1); DO5H
(a  
    n(j)=n1+n2/((wavel(j))^2); S0zk<S  
    k(j)=k1*exp(k2/wavel(j)); kX1#+X  
    N(j)=n(j)-i*k(j); av; ~e<  
    phase(j)=2*pi*N(j)*d/wavel(j); C8oAl3d+h  
    ns(j)=nsub(j,1); :wcv,
YoSG  
    B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); T`Jj$Lue{
 
    C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); HUuZ7jJwf  
    T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); k%-S7iQ  
    ts(j)=1-((1-ns(j))/(1+ns(j)))^2; >'MT]@vez  
    t1(j)=ts(j)*T(j); (G#QRSXc\  
    tf(j)=filmtran(j,1)/100; V']{n7a-  
    difference(j)=(t1(j)-tf(j))^2; ;q;}2  
end =eB^(!M  
G=symsum(difference(j),1,401); ky^u.+cZ  
G1=subs(G,n1,sym('x(1)')); q>^x,:L  
G2=subs(G1,n2,sym('x(2)')); 4Ww.CkRG  
G3=subs(G2,k1,sym('x(3)')); ndB [f  
G4=subs(G3,k2,sym('x(4)')); FKVf_Ncf%
 
G5=subs(G4,d,sym('x(5)')); 4^>FN"Ve`B  
T=-$ok`G  
2(%C  
iAd3w6  
在matlab下运行 '{I YANVT  
>> options=optimset('tolfun',1e-8,'tolx',1e-8); 08pG)_L  
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); &nXa/XIZ_  
u,f$c
R  
5Y}=,v*h}  
结果出错如下： u&7c2|Q  
KgCQ4w9  
??? Conversion to double from sym is not possible. {Bd 0  
Error in ==> fminsearch at 175 PRpW*#"EI  
fv(:,1) = funfcn(x,varargin{:}); m~xO;_m  
]u(EEsG/  
哪位高手给看看 y G{;kJ P  

哪位高人告诉我，错误在哪里呀。M文件复制到命令行，执行，一切正常，就是在求解多元函数0值时，不知道哪里错了。 zwEZ?m!  
r:QLO~l/  
WXgGB[x  
万分感谢呀