我的M文件如下： liuF;*
function [G5]=fun(x); 5/m^9@A
syms n1 n2 k1 k2 d; G"~% [k
[subwave,nsub]=textread('subout.txt','%f %f'); nKP[U=ac
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); 9sR?aW^$,/
[p,q]=size(subwave); N8s2v W
for j=1:p; T9,T'y>BD
wavel(j)=subwave(j,1); Sjogv
n(j)=n1+n2/((wavel(j))^2); |D
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k(j)=k1*exp(k2/wavel(j)); n%"0%A
N(j)=n(j)-i*k(j); BRu/py xG
phase(j)=2*pi*N(j)*d/wavel(j); h 9B^U?<wT
ns(j)=nsub(j,1); RkW)B ^#
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); GG KD8'j]
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); 0i4 X,oHjG
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); f-!A4eKe
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; H+VKWGmfG
t1(j)=ts(j)*T(j); N0:gY]o %
tf(j)=filmtran(j,1)/100; ?3v Oc/2@
difference(j)=(t1(j)-tf(j))^2; aeP
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end tB Z&h `
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G=symsum(difference(j),1,401); rTR4j>Ua~
G1=subs(G,n1,sym('x(1)')); :Y AxL J
G2=subs(G1,n2,sym('x(2)')); Fa !6*K\
G3=subs(G2,k1,sym('x(3)')); (zm5
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G4=subs(G3,k2,sym('x(4)')); n<. T6
G5=subs(G4,d,sym('x(5)')); `(RQh@H
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在matlab下运行 AxXFzMW
>> options=optimset('tolfun',1e-8,'tolx',1e-8); c2,1d `
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); vw'`t6
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结果出错如下： -]uN16\ F
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??? Conversion to double from sym is not possible. {u1Rc/Lw
Error in ==> fminsearch at 175 $SP *hkU
fv(:,1) = funfcn(x,varargin{:}); 7H1 ii
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哪位高手给看看 !+E|{Zj
