我的M文件如下： n$C- ^3 c
function [G5]=fun(x); R5ra*!|L)
syms n1 n2 k1 k2 d; a(vt"MQ_
[subwave,nsub]=textread('subout.txt','%f %f'); S'!&,Dxq^
[filmwave,filmtran]=textread('filmtr.dat','%f %f');
oT\K P
[p,q]=size(subwave); /O:4u_
for j=1:p; {
YQS fk
wavel(j)=subwave(j,1); ,
@jtD*c)
n(j)=n1+n2/((wavel(j))^2); ~
L4NK#
k(j)=k1*exp(k2/wavel(j)); O8 .iP+
N(j)=n(j)-i*k(j); <XLaJ;j
phase(j)=2*pi*N(j)*d/wavel(j); lNx P
ns(j)=nsub(j,1); f !k ZyD7
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); UE^o}Eyg
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); inU5eronuj
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); vSHPN|*
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; O4X03fUx
t1(j)=ts(j)*T(j); sY!JB7!j
tf(j)=filmtran(j,1)/100; =Smd/'`_
difference(j)=(t1(j)-tf(j))^2; Q$ew. h
end 4"@; .C""
G=symsum(difference(j),1,401); ZRf9 'UwS
G1=subs(G,n1,sym('x(1)'));
ULt5Zi
G2=subs(G1,n2,sym('x(2)')); W kiT,(i
G3=subs(G2,k1,sym('x(3)')); _]*YSeh=
G4=subs(G3,k2,sym('x(4)')); )'m;a_ r`
G5=subs(G4,d,sym('x(5)')); OpaRQ=
a"-uJn
!!Ww#x~k$[
>s5}pkAv|e
在matlab下运行 1*p6UR&
>> options=optimset('tolfun',1e-8,'tolx',1e-8); iz=cjmV?
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); {Lal5E4-
-]^JaQw
b|-)p+ba
结果出错如下： _b<;n|^
8$~oiK%fw
??? Conversion to double from sym is not possible. </;e$fh`
Error in ==> fminsearch at 175 ~T H4='4W3
fv(:,1) = funfcn(x,varargin{:}); l 8?C[, K%
4}DFCF%B
哪位高手给看看 E @C.}37R
