我的M文件如下： +>,I1{u%&
function [G5]=fun(x); jp,4h4C^)
syms n1 n2 k1 k2 d; 7! N s m
[subwave,nsub]=textread('subout.txt','%f %f'); R&&4y 7
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); V! Uc(
[p,q]=size(subwave); M]^5 s;y
for j=1:p; V0@=^Bls
wavel(j)=subwave(j,1); L0,'mS
n(j)=n1+n2/((wavel(j))^2); ?< +WG/(d
k(j)=k1*exp(k2/wavel(j)); !0+JbZ<%r|
N(j)=n(j)-i*k(j); [JiH\+XLPs
phase(j)=2*pi*N(j)*d/wavel(j); qGo.WZ$
ns(j)=nsub(j,1); W1~0_;
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); X'sr L j.
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); %J(:ADu]
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); e
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ts(j)=1-((1-ns(j))/(1+ns(j)))^2; _>+Ld6 .T6
t1(j)=ts(j)*T(j); T)/eeZ$
tf(j)=filmtran(j,1)/100; C+$#y2"z#n
difference(j)=(t1(j)-tf(j))^2; MtdG>TzUn
end 1} x%%RD_
G=symsum(difference(j),1,401); N8jIMb'<
G1=subs(G,n1,sym('x(1)')); #mdc [.
G2=subs(G1,n2,sym('x(2)')); +7Gwg
G3=subs(G2,k1,sym('x(3)')); pBHR a?Y5
G4=subs(G3,k2,sym('x(4)')); .('SW\u-
G5=subs(G4,d,sym('x(5)')); K- v#.e4
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在matlab下运行 y[;>#j$
>> options=optimset('tolfun',1e-8,'tolx',1e-8); zhQJy?>'m
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); dO'(2 J8
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结果出错如下： Dt@SqX:~Ee
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??? Conversion to double from sym is not possible. J.a]K[ci
Error in ==> fminsearch at 175 *dQSw)R
fv(:,1) = funfcn(x,varargin{:}); F9PxSk_\9
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哪位高手给看看 dysS9a,
