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onlygaoyang

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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{:});
ÕâÊÇΪʲô°¡
ÐÂÊÖÉÏ·£¬×Ô¼º·ÖÎö²»À´£¬Çë¸ßÊÖÖ¸½ÌÏ£¬Ð»ÁË

[ Last edited by fegg7502 on 2009-12-7 at 23:08 ]
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ÒýÓûØÌû:
Originally posted by samtyty at 2009-8-30 11:26:
º¯ÊýÐèÒªÓú¯ÊýÃûµ¥¶À´æÅÌ£¬Ò»°ã²»ÄܺÍÖ÷³ÌÐò·ÅÔÚÒ»Æð¡£»¹ÓÐÄãµÄº¯Êý¿´ÆðÀ´Óеã¹Ö£¨¸Ð¾õ£©£¬ÒòΪûÓл·¾³£¬²»ÄܰïÄãµ÷ÊÔ¡£

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8Â¥2009-10-30 14:26:15
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redcrag

ľ³æ (ÖøÃûдÊÖ)

¡ï ¡ï
onlygaoyang(½ð±Ò+1):лл²ÎÓë
mingdong(½ð±Ò+1,VIP+0):¸Ðл½»Á÷£¡ 8-30 22:58
×Ô¼º¶¨ÒåfcµÄº¯ÊýÀïʹÓÃfc£¬ºÃÏñfsolve»¹²»ÈÏʶËü
http://redcrag.spaces.live.com/
2Â¥2009-08-29 08:05:40
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samtyty

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

¡ï ¡ï
onlygaoyang(½ð±Ò+1):лл²ÎÓë
mingdong(½ð±Ò+1,VIP+0):¸Ðл½»Á÷£¡ 8-30 22:58
º¯ÊýÐèÒªÓú¯ÊýÃûµ¥¶À´æÅÌ£¬Ò»°ã²»ÄܺÍÖ÷³ÌÐò·ÅÔÚÒ»Æð¡£»¹ÓÐÄãµÄº¯Êý¿´ÆðÀ´Óеã¹Ö£¨¸Ð¾õ£©£¬ÒòΪûÓл·¾³£¬²»ÄܰïÄãµ÷ÊÔ¡£
http://www.net.hr/2006/07/13/0311007.20.gif
3Â¥2009-08-30 11:26:26
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

samtyty

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
zeoliters(½ð±Ò+2,VIP+0):¸Ðл»ØÌû½»Á÷£¡ 8-30 18:24
dongdong3881(½ð±Ò+4,VIP+0):¶àл½»Á÷ 10-30 15:19
ÖÕÓÚÕÒµ½Ò»Ì¨»úÆ÷¿ÉÒÔ²âÊÔÄãµÄ´úÂ룺
°´ÕÕÎÒ˵µÄÒÔº¯ÊýÃûΪÎļþÃû°Ñº¯Êýµ¥¶À´æÅÌ¡£
º¯ÊýÖÐÓÐÒ»¸ö´íÎó£ºy(3)=¡­¡­µÄ×îºóÒ»¸öÀ¨ºÅÊÇÈ«½ÇµÄ£¬¸Ä³É°ë½Ç¾Í¿ÉÒÔÖ´ÐÐÁË
½á¹ûÈçÏ£º
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
http://www.net.hr/2006/07/13/0311007.20.gif
4Â¥2009-08-30 23:39:30
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