[求助]fminsearch应用出错 [复制链接]

我的M文件如下： >4lT0~V/  
function [G5]=fun(x); r=3knCEWK  
syms n1 n2 k1 k2 d; 1S26
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[subwave,nsub]=textread('subout.txt','%f %f'); zrJ/Fs+s  
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); z}[qk:  
[p,q]=size(subwave); umo@JWr  
for j=1:p; wWNHZv&  
    wavel(j)=subwave(j,1); z nc'  
    n(j)=n1+n2/((wavel(j))^2); 0{GpO6!  
    k(j)=k1*exp(k2/wavel(j)); "x)xjL  
    N(j)=n(j)-i*k(j); 1TvR-.e  
    phase(j)=2*pi*N(j)*d/wavel(j); SdTJ?P+m  
    ns(j)=nsub(j,1); /\_wDi+#  
    B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); Cp@' k;(  
    C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); AqzPwO^  
    T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); xXktMlI  
    ts(j)=1-((1-ns(j))/(1+ns(j)))^2; bqt*d)$  
    t1(j)=ts(j)*T(j); $"/xi `  
    tf(j)=filmtran(j,1)/100; NHCdf*  
    difference(j)=(t1(j)-tf(j))^2; 4,|A\dXE  
end r6Hdp  
G=symsum(difference(j),1,401); Pkbx/\  
G1=subs(G,n1,sym('x(1)')); 8,,$C7"EP  
G2=subs(G1,n2,sym('x(2)')); 8C{mV^cn~  
G3=subs(G2,k1,sym('x(3)')); DGwN*>X  
G4=subs(G3,k2,sym('x(4)')); u0@i3Po  
G5=subs(G4,d,sym('x(5)')); 07_ym\N  
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在matlab下运行 WYb\vm=r  
>> options=optimset('tolfun',1e-8,'tolx',1e-8); ?1?zmaS  
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); h
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结果出错如下： ORV~F0d<  
bnz2\C9^  
??? Conversion to double from sym is not possible. na&?Cw  
Error in ==> fminsearch at 175 ]mN'Qoc  
fv(:,1) = funfcn(x,varargin{:}); LH4!QDK-  
^qaS  
哪位高手给看看 cVt MCgx  

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。 cY|?iEVs)  
E|t.
3  
R#ABda9  
万分感谢呀