我的M文件如下： 4vW:xK
function [G5]=fun(x); 2\lUaC#E
syms n1 n2 k1 k2 d; P0 D vZV8
[subwave,nsub]=textread('subout.txt','%f %f'); ;0P2nc:U~
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); 4=>/x90y
[p,q]=size(subwave); X9#Od9cNaC
for j=1:p; W !2(Ph*
wavel(j)=subwave(j,1); C8DZ:3E$c
n(j)=n1+n2/((wavel(j))^2); VLA9&.*@
k(j)=k1*exp(k2/wavel(j)); `8KWZi4
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N(j)=n(j)-i*k(j); iAbtv^fn
phase(j)=2*pi*N(j)*d/wavel(j); 73rr">
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ns(j)=nsub(j,1); ul>$vUbyf
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); /R b`^n#
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); ~z ^VMr
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); j$n[; \]n
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; FG38) /
t1(j)=ts(j)*T(j);
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tf(j)=filmtran(j,1)/100; p Z uYmMP
difference(j)=(t1(j)-tf(j))^2; o2@8w[r
end |/Am\tk#13
G=symsum(difference(j),1,401); 8AOJ '~$
G1=subs(G,n1,sym('x(1)')); G5 Y 8]N
G2=subs(G1,n2,sym('x(2)')); x0?8AG%
G3=subs(G2,k1,sym('x(3)')); \@8$tQCZ
G4=subs(G3,k2,sym('x(4)')); cx&jnF#$
G5=subs(G4,d,sym('x(5)')); # |
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在matlab下运行 h3h2 KqM'
>> options=optimset('tolfun',1e-8,'tolx',1e-8); j,8* Z~\5
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); ' {@hBB+ D
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结果出错如下： 2(YZTaY
|g}!
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??? Conversion to double from sym is not possible. Y
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Error in ==> fminsearch at 175 C=t:0.:PJ
fv(:,1) = funfcn(x,varargin{:}); u 3wF)B{
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哪位高手给看看 R)?K+ cJ%
