我的M文件如下： Xog/O i
function [G5]=fun(x); ~:;3uL s,8
syms n1 n2 k1 k2 d; h *0S$p<[1
[subwave,nsub]=textread('subout.txt','%f %f'); MgnM,95
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); I9$c F)zk
[p,q]=size(subwave); s*M@%_A?
for j=1:p; oC*ees
g_
wavel(j)=subwave(j,1); !2Dy_U=
n(j)=n1+n2/((wavel(j))^2); ~>G]_H]?
k(j)=k1*exp(k2/wavel(j)); WV ;=@ v
N(j)=n(j)-i*k(j); [ {[N( g&d
phase(j)=2*pi*N(j)*d/wavel(j); W:&R~R
ns(j)=nsub(j,1); NX* O_/
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); t$& Qv)
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); S6nhvU:
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); u%|zc=
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; ,7]k fB
t1(j)=ts(j)*T(j); 1F[L"W;r
tf(j)=filmtran(j,1)/100; q)u2Y]
difference(j)=(t1(j)-tf(j))^2; ;sdN-mb
end V BoMT:#
G=symsum(difference(j),1,401); # jYpVc{]
G1=subs(G,n1,sym('x(1)')); 6,Hqb<(
G2=subs(G1,n2,sym('x(2)')); }pNX@C#De
G3=subs(G2,k1,sym('x(3)')); R U"/2i
G4=subs(G3,k2,sym('x(4)')); .W\ve >;
G5=subs(G4,d,sym('x(5)')); $* MCU nl
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x c
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在matlab下运行 Q.-*7h8
>> options=optimset('tolfun',1e-8,'tolx',1e-8);
V+MK'<#B
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); \L!uHAE2a
`%K`gYhG1
ux2013C_
结果出错如下： :LJ7ru2
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??? Conversion to double from sym is not possible. A(6xg)_XQ
Error in ==> fminsearch at 175 '3tw<k!1{.
fv(:,1) = funfcn(x,varargin{:}); cleOsj;S
; ~ 4k7Uz
哪位高手给看看 ^~ =9
