我的M文件如下： ?]Yic]$n
function [G5]=fun(x); 3Y#Q'r?
syms n1 n2 k1 k2 d; 73Dxf -
[subwave,nsub]=textread('subout.txt','%f %f'); T:^. ; ZY
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); Wu>]R'C
[p,q]=size(subwave); 'L /)9.29
for j=1:p;
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wavel(j)=subwave(j,1); G % F #I
n(j)=n1+n2/((wavel(j))^2); #S>N}<>
k(j)=k1*exp(k2/wavel(j)); *zrT;j G
N(j)=n(j)-i*k(j); A 95f !a
phase(j)=2*pi*N(j)*d/wavel(j); b
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ns(j)=nsub(j,1); O=K
lc+Oo
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); i nu.U[.
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); L]Tj] u )
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); u>XXKlW:
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; l@`k:?
t1(j)=ts(j)*T(j);
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tf(j)=filmtran(j,1)/100; o&JoeKXor
difference(j)=(t1(j)-tf(j))^2; gtKih
end > ,6
G=symsum(difference(j),1,401); ?QP>rm
G1=subs(G,n1,sym('x(1)')); " ityx?
G2=subs(G1,n2,sym('x(2)')); kZ9Gl!g
G3=subs(G2,k1,sym('x(3)')); E|=x+M1sH
G4=subs(G3,k2,sym('x(4)')); 3u@,OE
G5=subs(G4,d,sym('x(5)')); j.M]F/j
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在matlab下运行 p$,7qGST
>> options=optimset('tolfun',1e-8,'tolx',1e-8); ;~3;CijJ8
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); k>i88^ kPV
175e:\Tw
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结果出错如下： M$x,B#b
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??? Conversion to double from sym is not possible. /_{-~0Z=@B
Error in ==> fminsearch at 175 aB%.]bi
fv(:,1) = funfcn(x,varargin{:}); ZayJllaq^
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哪位高手给看看 Z~:)hwF
