我的M文件如下： %,T*[d &i
function [G5]=fun(x); aw*]b.f
syms n1 n2 k1 k2 d; yT7$6x
[subwave,nsub]=textread('subout.txt','%f %f'); .a@12J(I
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); @lN\.O
[p,q]=size(subwave); p>tkRA?lk
for j=1:p; Dj\nsc@e3
wavel(j)=subwave(j,1); m4/qxm"Dx:
n(j)=n1+n2/((wavel(j))^2); ,6>3aD1w~q
k(j)=k1*exp(k2/wavel(j)); gC1LQ!:;Oi
N(j)=n(j)-i*k(j); - pC'C%Q
phase(j)=2*pi*N(j)*d/wavel(j); TE
Z%|5(]
ns(j)=nsub(j,1); JWb +
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); G Aj%o]}u
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); P7 3GH
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); "6jt$-?
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; 3x;UAi+&
t1(j)=ts(j)*T(j); KfiSQ!{
tf(j)=filmtran(j,1)/100; D {+@ ,C7B
difference(j)=(t1(j)-tf(j))^2; pCE
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end l 2Sar1~1
G=symsum(difference(j),1,401); oP,*H6)i
G1=subs(G,n1,sym('x(1)')); ,`HweIq(
G2=subs(G1,n2,sym('x(2)')); KqG b+N-@
G3=subs(G2,k1,sym('x(3)')); h*fN] k6
G4=subs(G3,k2,sym('x(4)')); R%jOgZG
G5=subs(G4,d,sym('x(5)')); t W UI?\
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在matlab下运行 Qf~>5(,h
>> options=optimset('tolfun',1e-8,'tolx',1e-8); nqy*>X`
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); Q4cCg7|0
{xZ Y4b2
&Sd5]r@+
结果出错如下： @AZNF+
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$ )#orZtzr
??? Conversion to double from sym is not possible. $}&a*c>
Error in ==> fminsearch at 175 uz!8=,DFw
fv(:,1) = funfcn(x,varargin{:}); lAN&d;NU6Z
g7zl5^o3 j
哪位高手给看看 nYx
/q
