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liangyufei0

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512095518

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ÒýÓûØÌû:
11Â¥: Originally posted by 514741735 at 2016-08-26 20:05:03
ÇëÎʳõʼֵֻÄÜÊÔ´ÕÂð£¿ÓÐûÓкõİ취ʹµÃÈ·¶¨µÄ³õʼֵ»ñµÃ×îºÃµÄÄâºÏЧ¹û£¿...

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Äã¿ÉÒÔ³¢ÊÔÓÃ1stoptÕâ¿îÈí¼þÀ´×öÄâºÏ·ÖÎö£¬Õâ¸öÈí¼þ²»ÐèÒª³õʼֵ£¬Ëü×Ô¼ºÄܼÆËãµÃµ½ºÜºÃµÄ½á¹û£¬»¹Óкܶàͳ¼Æ²ÎÊýÒ»ÆðÊä³ö¡£
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12Â¥2016-08-27 09:46:45
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²é¿´È«²¿ 29 ¸ö»Ø´ð

hellosu

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liangyufei0: ½ð±Ò+10, ¡ï¡ï¡ïºÜÓаïÖú, ºÜÓаïÖú£¬µ«ÉÐδ½â¾ö£¬¶àл£¡ 2016-02-29 16:04:44
x=[0.0019 0.0031 0.0049 0.0093 0.0168 0.0330];
y=[0.698 0.609 0.520 0.350 0.223 0.130];
f=@(c,x) 1-((c(3)*x)^c(2)/(1+(c(3)*x)*c(2)))^c(1);
c0=[1 1 1];
[c,resnorm]=lsqcurvefit(f,c0,x,y);
plot(x,y,'.-',x,f(c,x),'r:x')
legend('ԭʼÊý¾Ý','ÄâºÏÊý¾Ý')
2Â¥2016-02-29 15:40:38
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

liangyufei0

ľ³æ (ÖøÃûдÊÖ)

ÒýÓûØÌû:
2Â¥: Originally posted by hellosu at 2016-02-29 15:40:38
x=;
y=;
f=@(c,x) 1-((c(3)*x)^c(2)/(1+(c(3)*x)*c(2)))^c(1);
c0=;
=lsqcurvefit(f,c0,x,y);
plot(x,y,'.-',x,f(c,x),'r:x')
legend('ԭʼÊý¾Ý','ÄâºÏÊý¾Ý')...

Ê×ÏȸÐлhellosuÓ¦Öú£¡
µ«³ÌÐòÔËÐгöÏÖÈçÏ´íÎó£¬ÐÂÊÖ£¬²»ÖªÈçºÎ½â¾ö£¬»¹Çë¸ßÊÖÔÙ´ÎÏàÖú£¡
??? Error using ==> mpower
Matrix must be square.

Error in ==> @(c,x)1-((c(3)*x)^c(2)/(1+(c(3)*x)^c(2)))^c(1)


Error in ==> lsqncommon at 152
            fuser = funfcn{3}(xargin{:},varargin{:});

Error in ==> lsqcurvefit at 186
[x,Resnorm,FVAL,EXITFLAG,OUTPUT,LAMBDA,JACOB] = ...

Caused by:
    Failure in initial user-supplied objective function evaluation. LSQCURVEFIT cannot continue.
3Â¥2016-02-29 16:03:15
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

hellosu

ľ³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
3Â¥: Originally posted by liangyufei0 at 2016-02-29 16:03:15
Ê×ÏȸÐлhellosuÓ¦Öú£¡
µ«³ÌÐòÔËÐгöÏÖÈçÏ´íÎó£¬ÐÂÊÖ£¬²»ÖªÈçºÎ½â¾ö£¬»¹Çë¸ßÊÖÔÙ´ÎÏàÖú£¡
??? Error using ==> mpower
Matrix must be square.

Error in ==> @(c,x)1-((c(3)*x)^c(2)/(1+(c(3)*x)^c(2 ...

clear
clc
x=[0.0019 0.0031 0.0049 0.0093 0.0168 0.0330];
y=[0.698 0.609 0.520 0.350 0.223 0.130];
f=@(c,x) (1-((c(3).*x).^c(2)/(1+(c(3).*x).*c(2))).^c(1));
c0=[1 1 1];
[c,resnorm]=lsqcurvefit(f,c0,x,y);
plot(x,y,'.-',x,f(c,x),'r:x')
legend('ԭʼÊý¾Ý','ÄâºÏÊý¾Ý')

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