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mohunter

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[½»Á÷] Çë½ÌMATLABÎÊÌâ

syms a1 a2 a3 a4 a5 x
t=a1.*x+a2.*x.^2+a3.*x.^3+a4.*x.^4+a5.*x.^5;
f=(1+t+t^2/2+t^3/6+t^4/24+t^5/120);
f1=int(x*f,x,-3,3);
f2=int(f,x,-3,3);
r1=1-f1/f2;g1=int(x^2*f,x,-3,3);
g2=f2;
r2=1-g1/g2;
r=inline(r1^2+r2^2);
a=[a1,a2,a3,a4,a5];
a0=[0,0,0,0,0];
options=[];
a=fminunc(r,a0,options)
??? Error using ==> inline.feval
Not enough inputs to inline function.

Error in ==> fminunc at 182
   f = feval(funfcn{3},x,varargin{:});
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crystaler_

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2Â¥2009-04-26 20:34:08
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areocp

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areocp

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È磺£¨Çó½âF(x)=x^2*cos(a*x)-b ,a,bÊDZêÁ¿£»xÊÇÏòÁ¿ £©

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Fofx=inline(¡®x .^2*cos(a*x)-b¡¯ , ¡®x¡¯,¡¯a¡¯,¡¯b¡¯);

g= Fofx([pi/3 pi/3.5],4,1)

ϵͳÊä³öΪ£ºg=-1.5483 -1.7259
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mohunter

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