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fanyushan 2010-07-19 14:12

fminsearch应用出错

我的M文件如下: T:S{3  
function [G5]=fun(x); `;qv}  
syms n1 n2 k1 k2 d; ) .-(-6=R  
[subwave,nsub]=textread('subout.txt','%f %f'); Omh&)|Iql  
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); D ,ZNh1xt  
[p,q]=size(subwave); 3zA=q[C  
for j=1:p; gqdB!l4  
    wavel(j)=subwave(j,1); u4#~ i0@  
    n(j)=n1+n2/((wavel(j))^2); `?o1cf A  
    k(j)=k1*exp(k2/wavel(j)); _ K+V?-=  
    N(j)=n(j)-i*k(j); &]yJCzo]  
    phase(j)=2*pi*N(j)*d/wavel(j); ~R?dDL  
    ns(j)=nsub(j,1); E"1 ;i  
    B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); T3t~=b>&L  
    C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); 1yaIV+_y/  
    T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); 9 QCpXy  
    ts(j)=1-((1-ns(j))/(1+ns(j)))^2; -KwL9J4u  
    t1(j)=ts(j)*T(j); d+m6-4[_k  
    tf(j)=filmtran(j,1)/100; J]Gc  
    difference(j)=(t1(j)-tf(j))^2; So\|Ye  
end aC8,Y$>?E`  
G=symsum(difference(j),1,401); k`7.p,;}U  
G1=subs(G,n1,sym('x(1)')); :Y J7J4  
G2=subs(G1,n2,sym('x(2)')); af?\kBm  
G3=subs(G2,k1,sym('x(3)')); `/wq3+?  
G4=subs(G3,k2,sym('x(4)')); >uchF8)e|  
G5=subs(G4,d,sym('x(5)')); 4'{hI;&a&  
2 .Eu+*UC  
itC *Z6^  
;x3 ]4^  
在matlab下运行 \;B$hT7z*  
>> options=optimset('tolfun',1e-8,'tolx',1e-8); 3dxnh,]&@  
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); 1^60I#Vr@  
Z}K.^\S9  
o9T@uWh+  
结果出错如下: H7tQ#  
y800(z  
??? Conversion to double from sym is not possible. }*B qi7E>  
Error in ==> fminsearch at 175 1IF'>*  
fv(:,1) = funfcn(x,varargin{:}); dp UdFuU"  
@!&Jgg53G  
哪位高手给看看 }[KDE{,V  
fanyushan 2010-07-21 07:47
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。 {+/ .5  
"BLv4s|y7L  
i!.I;@  
万分感谢呀
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