我的M文件如下： *wW/nr=\;
function [G5]=fun(x); {e,m<mA i
syms n1 n2 k1 k2 d; 5TlPs_o
[subwave,nsub]=textread('subout.txt','%f %f'); ZoJ:4uo
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[filmwave,filmtran]=textread('filmtr.dat','%f %f'); o[AQS`
[p,q]=size(subwave); A8JEig 3Ix
for j=1:p; &&e{ 9{R
wavel(j)=subwave(j,1);
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n(j)=n1+n2/((wavel(j))^2); ;^ )(q<]
k(j)=k1*exp(k2/wavel(j)); 7)zn[4v7qt
N(j)=n(j)-i*k(j); /ZAS%_as
phase(j)=2*pi*N(j)*d/wavel(j); l 6wX18~XJ
ns(j)=nsub(j,1); Ba/Z<1)
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); z n5
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); 0dhJ# [Y
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); 5q[0;`J
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; zR)|%[sWwQ
t1(j)=ts(j)*T(j); 9W QC\/w
tf(j)=filmtran(j,1)/100; 6,'v
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difference(j)=(t1(j)-tf(j))^2; 8ID
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end \nV|Y=5
G=symsum(difference(j),1,401); Ww*='lz
G1=subs(G,n1,sym('x(1)')); mLM$dk3
G2=subs(G1,n2,sym('x(2)')); L{$ZL &
G3=subs(G2,k1,sym('x(3)')); ^.Y"<oZSS
G4=subs(G3,k2,sym('x(4)')); Qg+0(odd
G5=subs(G4,d,sym('x(5)')); {N+N4*
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在matlab下运行 }9fH`C/m
>> options=optimset('tolfun',1e-8,'tolx',1e-8); }fw;{&s{z
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); nf!RB-orF
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结果出错如下： 0 1 [LPN
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??? Conversion to double from sym is not possible. ~~ ]/<d
Error in ==> fminsearch at 175 07-S%L7Z
fv(:,1) = funfcn(x,varargin{:}); ;J pdnV
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哪位高手给看看 cOra`7L`
