我的M文件如下： `]K,'i{ R
function [G5]=fun(x); t-!Rgg$9
syms n1 n2 k1 k2 d; xJvLuzUD
[subwave,nsub]=textread('subout.txt','%f %f'); X,>(Y8
[filmwave,filmtran]=textread('filmtr.dat','%f %f'); qPsyqn ?Y|
[p,q]=size(subwave); X!T|0 7#c
for j=1:p; |.j^G2x
wavel(j)=subwave(j,1); ;e&!
n(j)=n1+n2/((wavel(j))^2); M$,Jg5Dc
k(j)=k1*exp(k2/wavel(j)); C0zrXhY_v
N(j)=n(j)-i*k(j); 5\VxXiy 0
phase(j)=2*pi*N(j)*d/wavel(j); mYX56,b}5
ns(j)=nsub(j,1); "3@KRb4f
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); De;, =BSp
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); "\`>2
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); LL{t5(- _
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; v-ThdE$G#
t1(j)=ts(j)*T(j); 9U]pH%.9
tf(j)=filmtran(j,1)/100; > P(eW7RL
difference(j)=(t1(j)-tf(j))^2; R @"`~#$$
end >/b^fAG
G=symsum(difference(j),1,401);
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G1=subs(G,n1,sym('x(1)')); BApa^j\?
G2=subs(G1,n2,sym('x(2)')); N].4"0Jv-D
G3=subs(G2,k1,sym('x(3)')); f] (I.lm:
G4=subs(G3,k2,sym('x(4)')); YjFWC!Qj$
G5=subs(G4,d,sym('x(5)')); =Wj{]&`
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在matlab下运行 N vcHv7,
>> options=optimset('tolfun',1e-8,'tolx',1e-8); 6!Qknk$
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); -zprNQW
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结果出错如下： vsH3{:&;"P
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??? Conversion to double from sym is not possible. VW {,:Ya
Error in ==> fminsearch at 175 {-Yee[d<?
fv(:,1) = funfcn(x,varargin{:}); Cgo9rC~]
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哪位高手给看看 M ]1;
