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[½»Á÷] ¡¾ÇóÖú¡¿Ë­¸æËßÎÒÏÂMATLAB´íÎóµÄÔ­Òò

function y=fc(x)
y(1)=x(1)*6.23*3.11/((6.23/x(2)/x(3)^2)+6.23*3.11)-0.392;
y(2)=x(1)*4.98*1.87/((4.98/x(2)/x(3)^2)+4.984*1.866)-0.368;
y(3)=x(1)*4.58*1.46/((4.58/x(2)/x(3)^2)+4.579*1.46£©-0.357;
y=[y(1) y(2) y(3)]

x0=[0.5 100 100]
fsolve('fc',x0)
??? Error using ==> feval
Undefined command/function 'fc'.

Error in ==> fsolve at 180
        fuser = feval(funfcn{3},x,varargin{:});
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[ Last edited by fegg7502 on 2009-12-7 at 23:08 ]
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samtyty

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dongdong3881(½ð±Ò+4,VIP+0):¶àл½»Á÷ 10-30 15:19
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º¯ÊýÖÐÓÐÒ»¸ö´íÎó£ºy(3)=¡­¡­µÄ×îºóÒ»¸öÀ¨ºÅÊÇÈ«½ÇµÄ£¬¸Ä³É°ë½Ç¾Í¿ÉÒÔÖ´ÐÐÁË
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fsolve('fc',x0)
y =

    0.1080    0.1327    0.1431


y =

    0.1080    0.1327    0.1431


y =

    0.1080    0.1327    0.1431


y =

    0.1080    0.1327    0.1431


y =

   -0.0199    0.0046    0.0152


y =

   -0.0199    0.0046    0.0152


y =

   -0.0199    0.0046    0.0152


y =

   -0.0199    0.0046    0.0152

Optimization terminated: first-order optimality is less than options.TolFun.

ans =

    0.3721  100.8594   99.5050
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4Â¥2009-08-30 23:39:30
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2008911

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yujunhui

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sn6526

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