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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: q".l:T%|C}  
    function [G5]=fun(x); mT!~;] RrF  
    syms n1 n2 k1 k2 d; [W^6=7EO  
    [subwave,nsub]=textread('subout.txt','%f %f'); IDLA-Vxo  
    [filmwave,filmtran]=textread('filmtr.dat','%f %f'); /x$jd )C  
    [p,q]=size(subwave); HO' ELiZ_q  
    for j=1:p; CuuHRvU8  
        wavel(j)=subwave(j,1); xg3G  
        n(j)=n1+n2/((wavel(j))^2); 0Fbq/63  
        k(j)=k1*exp(k2/wavel(j)); ?\c*DNM'  
        N(j)=n(j)-i*k(j); &p=~=&g=  
        phase(j)=2*pi*N(j)*d/wavel(j); _ e`b^_  
        ns(j)=nsub(j,1); UK _2i(I"e  
        B(j)=cos(phase(j))+ns(j)*i*sin(phase(j))/N(j); ^~(bm$4r  
        C(j)=i*N(j)*sin(phase(j))+ns(j)*cos(phase(j)); S;|%'Sn|j9  
        T(j)=4*ns(j)/((B(j)+C(j))*conj(B(j)+C(j))); !>>$'.nb@~  
        ts(j)=1-((1-ns(j))/(1+ns(j)))^2; _II;$_N  
        t1(j)=ts(j)*T(j); ;K:.*sAa  
        tf(j)=filmtran(j,1)/100; H2k>E}`  
        difference(j)=(t1(j)-tf(j))^2; Bb-x1{t  
    end P6IhpB59  
    G=symsum(difference(j),1,401); v[Ar{t&  
    G1=subs(G,n1,sym('x(1)')); +d#ZSNu/  
    G2=subs(G1,n2,sym('x(2)')); yP-.8[;  
    G3=subs(G2,k1,sym('x(3)')); &<!I]:Y  
    G4=subs(G3,k2,sym('x(4)')); ia?8 Z"&lK  
    G5=subs(G4,d,sym('x(5)')); >aa-ix &  
    Q^mJ_~  
    [0J0<JnK  
    E"u>&uPH  
    在matlab下运行 F~* 5`o  
    >> options=optimset('tolfun',1e-8,'tolx',1e-8); *B3` #t  
    >> [xmin,value,flag,output]=fminsearch(@fun,[1.7,4000,0.005,400,500],options); @x{;a9y  
    XqJ@NgsY  
    ^-=,q.[7  
    结果出错如下: z` gR*+  
    8.9S91]=  
    ??? Conversion to double from sym is not possible. N'[^n,\(:  
    Error in ==> fminsearch at 175 nnr(\r~  
    fv(:,1) = funfcn(x,varargin{:}); 0eUsvzz 15  
    ;PLby]=O  
    哪位高手给看看 n*_FC  
     
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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。 ]2Lwd@  
    ~Jq<FVK  
    T.&^1qWWA  
    万分感谢呀