我的M文件如下： =%u|8Ea*`
function [G5]=fun(x); p d;-z
syms n1 n2 k1 k2 d; g@y"
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[subwave,nsub]=textread('subout.txt','%f %f'); otIJ[Mvyq
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); c6uKK h>
[p,q]=size(subwave); 4GfLS.Ip
for j=1:p; Wu4Nq+
wavel(j)=subwave(j,1); 0C p}
n(j)=n1+n2/((wavel(j))^2); MELGTP>
k(j)=k1*exp(k2/wavel(j)); 55cldo
N(j)=n(j)-i*k(j); ,%'0e /
phase(j)=2*pi*N(j)*d/wavel(j); m c+wRx
ns(j)=nsub(j,1);
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B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); 4d 3 Znpf
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); eq+o_ R}CS
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); JAb?u.,Ns_
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; 4QN;o%,
t1(j)=ts(j)*T(j); *D{/p/|[
tf(j)=filmtran(j,1)/100; iXm||?Rnx
difference(j)=(t1(j)-tf(j))^2; yK B[HpU-
end H|)1T-%
G=symsum(difference(j),1,401); $i@EfujY
G1=subs(G,n1,sym('x(1)')); 7L+X\oaB
G2=subs(G1,n2,sym('x(2)')); M96( Rg
G3=subs(G2,k1,sym('x(3)')); $048y
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G4=subs(G3,k2,sym('x(4)')); LZ)m](+M
G5=subs(G4,d,sym('x(5)')); 6lW Fx bh
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在matlab下运行 gc@#O#K~h^
>> options=optimset('tolfun',1e-8,'tolx',1e-8); @sHw+to|p)
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); ~Ex.Yp8.
& fSc{/
VMIX$#
结果出错如下： GWInN8.5
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??? Conversion to double from sym is not possible. %p2x^air
Error in ==> fminsearch at 175 kLVn(dC "
fv(:,1) = funfcn(x,varargin{:}); 6rQpK&Jx
GD[ou.C}k
哪位高手给看看 t/*K#]26
