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    [求助]fminsearch应用出错 [复制链接]

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    离线fanyushan
     
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    只看楼主 倒序阅读 楼主  发表于: 2010-07-19
    我的M文件如下: H|F>BjXn5  
    function [G5]=fun(x); g_>)Q  
    syms n1 n2 k1 k2 d; Ca+d ?IS  
    [subwave,nsub]=textread('subout.txt','%f %f'); 6$SsdT|8B  
    [filmwave,filmtran]=textread('filmtr.dat','%f %f'); z2!NBOv  
    [p,q]=size(subwave); &#.XLe\y  
    for j=1:p; }'kk}2ej`  
        wavel(j)=subwave(j,1); Z i7(lG  
        n(j)=n1+n2/((wavel(j))^2); Fxv~;o#  
        k(j)=k1*exp(k2/wavel(j)); k6[t$|lMy  
        N(j)=n(j)-i*k(j); :+]6SC0ql  
        phase(j)=2*pi*N(j)*d/wavel(j); rVQ:7\=Z  
        ns(j)=nsub(j,1); {+ [rJ_  
        B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); `{F8#    
        C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); Gpe h#Q4x  
        T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); X@x: F|/P  
        ts(j)=1-((1-ns(j))/(1+ns(j)))^2; AP3SOT3I  
        t1(j)=ts(j)*T(j); 3m7$$ N|  
        tf(j)=filmtran(j,1)/100; }}t"^ms  
        difference(j)=(t1(j)-tf(j))^2; .j7|;Ag  
    end 3h 0w8(k;  
    G=symsum(difference(j),1,401); A!iH g__/t  
    G1=subs(G,n1,sym('x(1)')); _3A$z A  
    G2=subs(G1,n2,sym('x(2)')); s.zH.q,  
    G3=subs(G2,k1,sym('x(3)')); s}|IRDpp  
    G4=subs(G3,k2,sym('x(4)')); J>hl&J  
    G5=subs(G4,d,sym('x(5)')); aM?7'8/  
    7jts;H=  
    n{4&('NRFP  
    e;rs!I !Yw  
    在matlab下运行 BAoqO Xv  
    >> options=optimset('tolfun',1e-8,'tolx',1e-8); 2Y  6/,W  
    >> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); ,vg8iR a  
    cY\-e?`=4  
    ( Y/ DMQ  
    结果出错如下: /8W}o/,s5  
    ~Gwn||g78  
    ??? Conversion to double from sym is not possible. j nI)n*  
    Error in ==> fminsearch at 175 1+#Vj#  
    fv(:,1) = funfcn(x,varargin{:}); 4 Iy\   
    'ARQ7 Q[`  
    哪位高手给看看 3: mF!  
     
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    离线fanyushan
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    只看该作者 1楼 发表于: 2010-07-21
    哪位高人告诉我,错误在哪里呀。M文件复制到命令行,执行,一切正常,就是在求解多元函数0值时,不知道哪里错了。 T w"^I*B  
    MIt\[EB  
    NRoi` IIj  
    万分感谢呀