我的M文件如下： 9 2_F 8y*D
function [G5]=fun(x); tu\;I{ h=0
syms n1 n2 k1 k2 d; f1MKYM%^x
[subwave,nsub]=textread('subout.txt','%f %f'); la#f,C3_
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); N^7Qn*qt[
[p,q]=size(subwave); Qr]xj7\@i
for j=1:p; Ug>yTc_(7
wavel(j)=subwave(j,1); !xmvCH=2
n(j)=n1+n2/((wavel(j))^2); jqq96hP,
k(j)=k1*exp(k2/wavel(j)); YW55i yM
N(j)=n(j)-i*k(j); gQaBQq9
phase(j)=2*pi*N(j)*d/wavel(j); -=BQVJ_dK{
ns(j)=nsub(j,1); n IdB,
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); H59}d
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C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); `|K30hRp:
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); #<d f!)
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; C9zQ{G
t1(j)=ts(j)*T(j); I>ks H
tf(j)=filmtran(j,1)/100; ^@?-YWt
difference(j)=(t1(j)-tf(j))^2; g a| RW0
end o C0K!{R*
G=symsum(difference(j),1,401); <#AS[Q[N
G1=subs(G,n1,sym('x(1)')); P0O5CaR
G2=subs(G1,n2,sym('x(2)')); S <~"\<ED
G3=subs(G2,k1,sym('x(3)')); =" Q5Z6W
G4=subs(G3,k2,sym('x(4)')); I^|6gaP |6
G5=subs(G4,d,sym('x(5)')); gN#&Ag<?
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在matlab下运行 UjLZ!-}
>> options=optimset('tolfun',1e-8,'tolx',1e-8); %oVoE2T{@
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); 4oW6&1
Pd-0u> k
0<f\bY02
结果出错如下： y4* }E
p)l >bC?3
??? Conversion to double from sym is not possible. DyeV
uB
Error in ==> fminsearch at 175 xb/L AlJ
fv(:,1) = funfcn(x,varargin{:}); s}Y_og_c
cHN
eiOF
哪位高手给看看 QC@nRy8%
