我的M文件如下： m <IPi <
function [G5]=fun(x); nS"K
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syms n1 n2 k1 k2 d; iaQ[}'6!$
[subwave,nsub]=textread('subout.txt','%f %f');
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[filmwave,filmtran]=textread('filmtr.dat','%f %f'); 7f8%WD)
[p,q]=size(subwave); !I-+wc{ss
for j=1:p; \xkLI:*\
wavel(j)=subwave(j,1); ~0w7E0DE[
n(j)=n1+n2/((wavel(j))^2); *#;8 mM
k(j)=k1*exp(k2/wavel(j)); 8[C p
N(j)=n(j)-i*k(j); 9"52b 9U
phase(j)=2*pi*N(j)*d/wavel(j); SJoQaR,) >
ns(j)=nsub(j,1); "5 PP<A,F(
B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); w(8q qU+\
C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); D QP#h5O
T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); vD D !.i
ts(j)=1-((1-ns(j))/(1+ns(j)))^2; xr&wV0O '
t1(j)=ts(j)*T(j); L!V`Sb
tf(j)=filmtran(j,1)/100; $SSE\+ |3
difference(j)=(t1(j)-tf(j))^2; V. )y7B
end qGuz`&i
G=symsum(difference(j),1,401); N~{0QewMI'
G1=subs(G,n1,sym('x(1)')); + L;[-]E8
G2=subs(G1,n2,sym('x(2)')); _s><>LH~
G3=subs(G2,k1,sym('x(3)')); '!Ps4ZTn_
G4=subs(G3,k2,sym('x(4)')); ` )\_
G5=subs(G4,d,sym('x(5)')); Wv_5sPqLW
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在matlab下运行 tBtJRi(
>> options=optimset('tolfun',1e-8,'tolx',1e-8); aO.'(kk8
>> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); u>< ax
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结果出错如下： uYIw ?fXy
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??? Conversion to double from sym is not possible. pu=T
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Error in ==> fminsearch at 175 +cvz
fv(:,1) = funfcn(x,varargin{:}); {k1s@KXtd
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哪位高手给看看 0 ! 9vGs
