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ÀÍ·³¸÷λ¿´Ï£ºÇó½âÈçÏÂÏßÐÔ·½³Ì×飬x(1)-0.7*sin(x(1))-0.2*cos(x(2))=0£»
                                                          x(2)-0.7*cos(x(1))+0.2*sin(x(2))=0 .
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function [x,val,k]=lmm(Fk,JFk,x0)
maxk=100;
rho=0.55;sigma=0.4;muk=norm(feval(Fk,x0));
k=0;epsilon=1e-6;n=length(x0);
while(k     fk=feval(Fk,x0);
    jfk=feval(JFk,x0);
    gk=jfk'*fk;
    dk=-(jfk'*jfk+muk*eye(n))\gk;
    if(norm(gk)     m=0;mk=0;
    while(m<20)
        newf=0.5*norm(feval(Fk,x0+rho^m*dk))^2;
        oldf=0.5*norm(feval(Fk,x0))^2;
        if(newf             mk=m;break;
        end
        m=m+1;
    end
    x0=x0+rho^mk*dk;
    muk=norm(feval(Fk,x0));
    k=k+1;
end
x=x0;
val=0.5*muk^2;

function JF=JFk(x)
JF=[1-0.7*cos(x(1)),0.2*sin(x(2));
    0.7*sin(x(1)),1+0.2*cos(x(2))];

function F = Fk(x)
F(1)=x(1)-0.7*sin(x(1))-0.2*cos(x(2));
F(2)=x(2)-0.7*cos(x(1))+0.2*sin(x(2));
F=F(;

ÃüÁî´°µ÷ÓøñʽÈçÏ£º
>> clear all;
>> [x,val,k]=lmm(Fk,Jfk,[1,1])

ÎÊÌâÊÇ£¬Ò»ÔËÐУ¬ÏÔʾ£º
??? Input argument "x" is undefined.
Error in ==> Fk at 3
F(1)=x(1)-0.7*sin(x(1))-0.2*cos(x(2));

ÏëÖªµÀÊÇÄÄÀï䶨Ò壿»¹Êǵ÷Óøñʽ²»¶Ô£¿
Èý¸öÎļþ¶¼Ã»Óб¨´í£¬µ«µ÷ÊÔʱ£¬ÏÔʾ
??? Input argument "Fk" is undefined.
Error in ==> lmm at 6
rho=0.55;sigma=0.4;muk=norm(feval(Fk,x0));

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ê½1988

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csgt0

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fegg7502: ½ð±Ò+1, Ó¦ÖúÖ¸Êý+1, 3ks 2013-04-02 09:31:20
feval('Fk',x0)
showmethemoney
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csgt0: ½ð±Ò+1, лл 2013-04-16 16:24:35
x1: 0.526522621903241
x2: 0.507919719042045
5Â¥2013-04-16 09:05:48
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yaozirel

½ð³æ (ÕýʽдÊÖ)

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>> clear all;
>> [x,val,k]=lmm(¡®Fk¡¯,¡®Jfk¡¯,[1£»1])
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