我的M文件如下： 2f6BZ8H+Z
function [G5]=fun(x); E9\u^"GVO
syms n1 n2 k1 k2 d; >d (:XP6J
[subwave,nsub]=textread('subout.txt','%f %f'); y@( EGfI
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); \M;cF "e-S
[p,q]=size(subwave); >Cam6L J
for j=1:p; 8g {;o 7
wavel(j)=subwave(j,1); 67Ev$a_d"
n(j)=n1+n2/((wavel(j))^2); %\L{Ud%7
k(j)=k1*exp(k2/wavel(j)); 3^iVDbAW{
N(j)=n(j)-i*k(j); CfT(a!;Eox
phase(j)=2*pi*N(j)*d/wavel(j); - "EPU]q
ns(j)=nsub(j,1); ftz-l&5
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); n lZJ}xZ
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); t&i 4kS^y
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); , Jx.Kj.,
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; .X5 A7 m
t1(j)=ts(j)*T(j);
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tf(j)=filmtran(j,1)/100; DVt^ O [
difference(j)=(t1(j)-tf(j))^2; Z<*"sFpAO
end >)HKruSW.
G=symsum(difference(j),1,401); MEu{'[C
G1=subs(G,n1,sym('x(1)')); >2v< ;.
G2=subs(G1,n2,sym('x(2)')); d@tf+_Ih
G3=subs(G2,k1,sym('x(3)')); Y$#6%`*#>n
G4=subs(G3,k2,sym('x(4)')); 9
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G5=subs(G4,d,sym('x(5)')); C~WWuju'
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在matlab下运行 T7-yZSw -m
>> options=optimset('tolfun',1e-8,'tolx',1e-8); /l+"aKW
2
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); `d Wnu3r;
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结果出错如下： q VavP 6I
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??? Conversion to double from sym is not possible. 2PSkLS&I M
Error in ==> fminsearch at 175 O`I}Lg]~q
fv(:,1) = funfcn(x,varargin{:}); ~pHuh#>
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哪位高手给看看 G .$KP
