我的M文件如下： H%=;pD>o
function [G5]=fun(x); _a$5 "
syms n1 n2 k1 k2 d; M`=\ijUwN
[subwave,nsub]=textread('subout.txt','%f %f'); $b^ niL
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); YGyw^$.w
[p,q]=size(subwave); GM^H
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for j=1:p; t ycVcr \(
wavel(j)=subwave(j,1); 6 AY~ >p
n(j)=n1+n2/((wavel(j))^2); pXQ$n:e
k(j)=k1*exp(k2/wavel(j)); lt5Knz2G,Z
N(j)=n(j)-i*k(j); Y nTx)uW
phase(j)=2*pi*N(j)*d/wavel(j); -c0 *
ns(j)=nsub(j,1); *fy aAv
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); P()&?C
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); \q!TI x
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); "f3mi[
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; Bdvp G
t1(j)=ts(j)*T(j); -~~R?,H'Z_
tf(j)=filmtran(j,1)/100; 2=7[r-*E
difference(j)=(t1(j)-tf(j))^2; ?u{Mz9:?HT
end PK{FQ3b2{
G=symsum(difference(j),1,401); " K|':3n|
G1=subs(G,n1,sym('x(1)')); $Mx?Y9!
G2=subs(G1,n2,sym('x(2)')); O#8lJ%?
G3=subs(G2,k1,sym('x(3)')); ND e FY
G4=subs(G3,k2,sym('x(4)')); RWDPsZC
G5=subs(G4,d,sym('x(5)')); (o\ D=!a
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Mac :E__G
在matlab下运行 BT -Y9j
>> options=optimset('tolfun',1e-8,'tolx',1e-8); >N~jlr |
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); 5Tidb$L;Du
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结果出错如下： :Xx7':5
=(,kjw8 8w
??? Conversion to double from sym is not possible. kMa|V0
Error in ==> fminsearch at 175 JV2[jo}0 N
fv(:,1) = funfcn(x,varargin{:}); F
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哪位高手给看看 & )-fC
