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½ð³æ (СÓÐÃûÆø)

[ÇóÖú] matlab½â·½³Ì ÒÑÓÐ2È˲ÎÓë

x=[0,0.25,0.5,0.75,1,1.25,1.5,1.75,2,2.25,2.5,3,3.5,4,4.5,5,5.5,6,6.5]
x=1/(15.3109*49.005^2).*[log((y./86.4241).*((86.4241-49.005)./(y-49.005)))-49.005.*(1./y-1./86.4241)]ÎÒÒÑÖªxÖµ£¬ÏàÇóyÖµ¡£¡£Ê¹ÓÃÁËfzero¡¢fslove¶¼¸÷ÖÖ³ö´í£¬¿¨ÔÚÕâºÃ¼¸ÌìÁË¡£¡£ÐÂÊÖ£¬´¦ÀíÊý¾ÝÁÙʱѧµÄ£¬»¹Çë´óÉñ°ïæ¡£¡£¸Ð¼¤²»¾¡¡£¡£Ï£Íû°Ñ³ÌÐò¸æËßÎÒ°¡¡£¡£»¹ÓкöàÒª´¦Àí¡£¡£
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Ö÷¹ÜÇø³¤ (Ö°Òµ×÷¼Ò)

ÒýÓûØÌû:
8Â¥: Originally posted by ½ò½ò°®Ë¯¾õ at 2015-07-20 14:09:49
ÏëÎÊÏÂÄâºÏµÄ´úÂëÊÇʲô°¡¡£¡£ÎÒÄâºÏ³öµÄ½á¹û¶¼²»¶Ô¡£¡£Ì«¸ÐлÁË£¬ÄãÈÃÎÒ¾õµÃÊÀ½ç¶¼ÁÁÁË...

1stOptÈí¼þ´úÂ룺
CODE:
Variable  x,y ;
Function x=1/(x2*49.005^2)*(ln((y/x1)*((x1-49.005)/(y-49.005)))-49.005*(1/y-1./x1));
Data;
         0   83.9499
    0.2500   69.1806
    0.5000   63.7801
    0.7500   62.1649
    1.0000   60.6538
    1.2500   59.8982
    1.5000   58.4652
    1.7500   57.7097
    2.0000   56.9541
    2.5000   55.7696
    3.0000   54.9544
    3.5000   53.8983
    4.0000   53.1428
    4.5000   52.1404
    5.0000   51.6460
    5.5000   51.3437
    6.0000   51.1179
    6.5000   50.8551

¼ÆËã½á¹û£º
Ïà¹ØÏµÊý(R): 0.994536826184908
Ïà¹ØÏµÊý֮ƽ·½(R^2): 0.98910349863795
¾ö¶¨ÏµÊý(DC): 0.98910349863795
¿¨·½ÏµÊý(Chi-Square): -0.475114996414728
Fͳ¼Æ(F-Statistic): 1452.36121690615

²ÎÊý        ×î¼Ñ¹ÀËã
----------        -------------
x2                 0.000124355240207823
x1                 71.0613092892056

1stoptÈí¼þ»ñµÃÁ´½Ó£ºhttp://muchong.com/bbs/viewthread.php?tid=4586018

Èç¹ûÄãÏëÓÃMATLAB OriginµÈÈí¼þ£¬¾ßÌå´úÂë»òÕß²Ù×÷²½Ö裬¿É²Î¼û£º
http://muchong.com/bbs/viewthread.php?tid=6572963
matlab½â·½³Ì
¸½Í¼1.png

MATLAB¡¢MSСÎÊÌâ¡¢ÆÕͨÎÊÌâÇë·¢ÌûÇóÖú£¡Ê±¼ä¾«Á¦ÓÐÏÞ£¬Ë¡²»½ÓÊÜÎÞ³¥Ë½ÐÅÇóÖú¡£
9Â¥2015-07-20 14:23:09
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
ÆÕͨ»ØÌû

dingd

Ìú¸Ëľ³æ (Ö°Òµ×÷¼Ò)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
ben_ladeng: ½ð±Ò+2, ÐÁ¿àÁË 2015-07-20 12:52:08
ÓÃ1stOptºÜ·½±ã£º
CODE:
LoopConstant x=[0,0.25,0.5,0.75,1,1.25,1.5,1.75,2,2.25,2.5,3,3.5,4,4.5,5,5.5,6,6.5];
Function
x=1/(15.3109*49.005^2)*(ln((y/86.4241)*((86.4241-49.005)/(y-49.005)))-49.005*(1/y-1/86.4241));

x        y
0        -52.980531685766
0.25        -0.005325680664864
0.5        -0.00266410044168563
0.75        -0.0017763656641459
1        -0.00133239055348768
1.25        -0.00106596977280202
1.5        -0.000888340653964983
1.75        -0.000761455084693858
2        -0.000666286667945962
2.25        -0.000592264240768995
2.5        -0.000533044674782525
3        -0.000444212582842599
3.5        -0.000380759044626785
4        -0.000333167756019921
4.5        -0.000296151628028883
5        -0.00026653829158802
5.5        -0.000242308908315198
6        -0.000222117554561104
6.5        -0.000205032419060659
2Â¥2015-07-20 10:55:11
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

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Ö÷¹ÜÇø³¤ (Ö°Òµ×÷¼Ò)

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¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ...
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
½ò½ò°®Ë¯¾õ: ½ð±Ò+100 2015-07-20 11:48:52
CODE:
function solve_eqs
clear all;clc
format long

global x
y0=-0.1;
x_data=[0,0.25,0.5,0.75,1,1.25,1.5,1.75,2,2.25,2.5,3,3.5,4,4.5,5,5.5,6,6.5];
for i=1:length(x_data)
    x=x_data(i);
[y(i) fval(i)]=fsolve(@eqs,y0);
end

[x_data ;y; fval]'

¼ÆËã½á¹û£º
                  x                                 y                     ·½³Ì²Ð²î
                 0                -1.506414574649781   0.000781864700102
   0.250000000000000  -0.005325680664661   0.000000000000122
   0.500000000000000  -0.002664100440992   0.000000000130176
   0.750000000000000  -0.001776365663977   0.000000000043270
   1.000000000000000  -0.001332390553487   0.000000000000432
   1.250000000000000  -0.001065969772692   0.000000000128479
   1.500000000000000  -0.000888340653914   0.000000000029346
   1.750000000000000  -0.000761455084694   0.000000000000222
   2.000000000000000  -0.000666286667945   0.000000000003717
   2.250000000000000  -0.000592264240769   0.000000000000011
   2.500000000000000  -0.000533044674760   0.000000000010490
   3.000000000000000  -0.000444212582825   0.000000000004250
   3.500000000000000  -0.000380759044612   0.000000000000032
   4.000000000000000  -0.000333167756007   0.000000000004873
   4.500000000000000  -0.000296151628018   0.000000000000042
   5.000000000000000  -0.000266538291578   0.000000000001760
   5.500000000000000  -0.000242308908306   0.000000000009863
   6.000000000000000  -0.000222117554561   0.000000000000224
   6.500000000000000  -0.000205032419053   0.000000000000051
MATLAB¡¢MSСÎÊÌâ¡¢ÆÕͨÎÊÌâÇë·¢ÌûÇóÖú£¡Ê±¼ä¾«Á¦ÓÐÏÞ£¬Ë¡²»½ÓÊÜÎÞ³¥Ë½ÐÅÇóÖú¡£
3Â¥2015-07-20 11:42:53
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

½ò½ò°®Ë¯¾õ

½ð³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by dingd at 2015-07-20 10:55:11
ÓÃ1stOptºÜ·½±ã£º

LoopConstant x=;
Function
x=1/(15.3109*49.005^2)*(ln((y/86.4241)*((86.4241-49.005)/(y-49.005)))-49.005*(1/y-1/86.4241));


x        y
0        -52.980531685766
0.25        -0.005325680664864
0 ...

ÍÛÍÛ¡£¡£Ôõô¶¼ÊǸºµÄ°¡¡£¡£ËµÃ÷ÎÒ²ÎÊýÄâºÏ´íÁË¡£¡£ÎÒÔ­·½³ÌÊÇx=1/(x(2).*49.005^2).*[log((y./x(1)).*((x(1)-49.005)./(y-49.005))-49.005.*(1./y-1./x(1))]..
xdata=[0,0.25,0.5,0.75,1,1.25,1.5,1.75,2,2.5,3,3.5,4,4.5,5,5.5,6,6.5]
ydata=[83.94986152,69.18056238,63.78006779,62.16487246,60.65377495,59.89822619,58.46520206,57.7096533,56.95410455,55.769572,54.95441885,53.89832959,53.14278084,52.14041949,51.64595481,51.34373531,51.11791018,50.85514711]..ÎÒÄâºÏ³öÁË·½³ÌÖеIJÎÊýx1,x2È»ºó¸ù¾ÝxdataÇóyÖµ
ÓÐÃÎÒ»Æð×·
4Â¥2015-07-20 11:45:48
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

½ò½ò°®Ë¯¾õ

½ð³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
3Â¥: Originally posted by ÔÂÖ»À¶ at 2015-07-20 11:42:53
function solve_eqs
clear all;clc
format long

global x
y0=-0.1;
x_data=;
for i=1:length(x_data)
    x=x_data(i);
=fsolve(@eqs,y0);
end

'



¼ÆËã½á¹û£º
                  x            ...

ÍÛÍÛ¡£¡£Ôõô¶¼ÊǸºµÄ°¡¡£¡£ËµÃ÷ÎÒ²ÎÊýÄâºÏ´íÁË¡£¡£ÎÒÔ­·½³ÌÊÇx=1/(x(2).*49.005^2).*[log((y./x(1)).*((x(1)-49.005)./(y-49.005))-49.005.*(1./y-1./x(1))]..
xdata=[0,0.25,0.5,0.75,1,1.25,1.5,1.75,2,2.5,3,3.5,4,4.5,5,5.5,6,6.5]
ydata=[83.94986152,69.18056238,63.78006779,62.16487246,60.65377495,59.89822619,58.46520206,57.7096533,56.95410455,55.769572,54.95441885,53.89832959,53.14278084,52.14041949,51.64595481,51.34373531,51.11791018,50.85514711]..ÎÒÄâºÏ³öÁË·½³ÌÖеIJÎÊýx1,x2È»ºó¸ù¾ÝxdataÇóyÖµ¡£¡£Äܲ»ÄÜÔÙ°ï°ïÎÒ°¡¡£¡£¸Ðл¡£¡£¼±Çó
ÓÐÃÎÒ»Æð×·
5Â¥2015-07-20 11:48:09
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÔÂÖ»À¶

Ö÷¹ÜÇø³¤ (Ö°Òµ×÷¼Ò)

ÒýÓûØÌû:
5Â¥: Originally posted by ½ò½ò°®Ë¯¾õ at 2015-07-20 11:48:09
ÍÛÍÛ¡£¡£Ôõô¶¼ÊǸºµÄ°¡¡£¡£ËµÃ÷ÎÒ²ÎÊýÄâºÏ´íÁË¡£¡£ÎÒÔ­·½³ÌÊÇx=1/(x(2).*49.005^2).*..
xdata=
ydata=..ÎÒÄâºÏ³öÁË·½³ÌÖеIJÎÊýx1,x2È»ºó¸ù¾ÝxdataÇóyÖµ¡£¡£Äܲ»ÄÜÔÙ°ï°ïÎÒ°¡¡£¡£¸Ðл¡£¡£¼±Çó...

²»ºÃÒâ˼£¬3Â¥´úÂëû¸ø³öÍêÈ«£¬ÍêÕûµÄÈçÏ£º
CODE:
function solve_eqs
clear all;clc
format long

global x
y0=-0.1;
x_data=[0,0.25,0.5,0.75,1,1.25,1.5,1.75,2,2.25,2.5,3,3.5,4,4.5,5,5.5,6,6.5];
for i=1:length(x_data)
    x=x_data(i);
[y(i) fval(i)]=fsolve(@eqs,y0);
end

[x_data ;y; fval]'

function f=eqs(y)
global x
f=1/(15.3109*49.005^2).*(log((y./86.4241).*((86.4241-49.005)./(y-49.005)))-49.005.*(1./y-1./86.4241))-x;

MATLAB¡¢MSСÎÊÌâ¡¢ÆÕͨÎÊÌâÇë·¢ÌûÇóÖú£¡Ê±¼ä¾«Á¦ÓÐÏÞ£¬Ë¡²»½ÓÊÜÎÞ³¥Ë½ÐÅÇóÖú¡£
6Â¥2015-07-20 12:30:29
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÔÂÖ»À¶

Ö÷¹ÜÇø³¤ (Ö°Òµ×÷¼Ò)

ÒýÓûØÌû:
4Â¥: Originally posted by ½ò½ò°®Ë¯¾õ at 2015-07-20 11:45:48
ÍÛÍÛ¡£¡£Ôõô¶¼ÊǸºµÄ°¡¡£¡£ËµÃ÷ÎÒ²ÎÊýÄâºÏ´íÁË¡£¡£ÎÒÔ­·½³ÌÊÇx=1/(x(2).*49.005^2).*..
xdata=
ydata=..ÎÒÄâºÏ³öÁË·½³ÌÖеIJÎÊýx1,x2È»ºó¸ù¾ÝxdataÇóyÖµ...

ÏÈÄâºÏ³ö£º
x2   =              0.000124354608284474
x1     =            71.0611809557734

Ïà¹ØÏµÊý(R): 0.99453642822085
Ïà¹ØÏµÊý֮ƽ·½(R^2): 0.989102707058286
¾ö¶¨ÏµÊý(DC): 0.989102707058287

´úÈëÖ®ºóÓÃMATLAB½â·½³Ì£º
CODE:
function solve_eqs
clear all;clc
format long

global x
y0=50;
x_data=[0,0.25,0.5,0.75,1,1.25,1.5,1.75,2,2.25,2.5,3,3.5,4,4.5,5,5.5,6,6.5];
for i=1:length(x_data)
    x=x_data(i);
[y(i) fval(i)]=fsolve(@eqs,y0);
end

[x_data ;y; fval]'

function f=eqs(y)
global x
f=1/(0.000124354608284474*49.005^2).*(log((y./71.0611809557734).*((71.0611809557734-49.005)./(y-49.005)))-49.005.*(1./y-1./71.0611809557734))-x;

¼ÆËã½á¹û£º
x                                               y                        ·½³Ì²Ð²î
                   0              71.061023088663632   0.000011398222637
   0.250000000000000  67.988292938180209   0.000000000096047
   0.500000000000000  65.534689215008385   0.000000331981567
   0.750000000000000  63.529133478234002   0.000000000137998
   1.000000000000000  61.859615079896656   0.000000036989439
   1.250000000000000  60.449405535313012   0.000003469065679
   1.500000000000000  59.244034566066560   0.000000108193081
   1.750000000000000  58.203506004930126   0.000000000309269
   2.000000000000000  57.297823894942496   0.000000002283940
   2.250000000000000  56.503949371087856   0.000000000099167
   2.500000000000000  55.803867449155170   0.000000000001618
   3.000000000000000  54.630610121986017   0.000000002101571
   3.500000000000000  53.693164548810202   0.000000017349405
   4.000000000000000  52.934038863155749   0.000000762365175
   4.500000000000000  52.312777591278476   0.000000000526119
   5.000000000000000  51.800007824280115   0.000000000001291
   5.500000000000000  51.373858765788839   0.000000363302177
   6.000000000000000  51.017693708877445   0.000000025319006
   6.500000000000000  50.718627743671938   0.000000000780623
MATLAB¡¢MSСÎÊÌâ¡¢ÆÕͨÎÊÌâÇë·¢ÌûÇóÖú£¡Ê±¼ä¾«Á¦ÓÐÏÞ£¬Ë¡²»½ÓÊÜÎÞ³¥Ë½ÐÅÇóÖú¡£
7Â¥2015-07-20 12:42:34
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

½ò½ò°®Ë¯¾õ

½ð³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
7Â¥: Originally posted by ÔÂÖ»À¶ at 2015-07-20 12:42:34
ÏÈÄâºÏ³ö£º
x2   =              0.000124354608284474
x1     =            71.0611809557734

Ïà¹ØÏµÊý(R): 0.99453642822085
Ïà¹ØÏµÊý֮ƽ·½(R^2): 0.989102707058286
¾ö¶¨ÏµÊý(DC): 0.989102707058287

´úÈëÖ®ºóÓÃMA ...

ÏëÎÊÏÂÄâºÏµÄ´úÂëÊÇʲô°¡¡£¡£ÎÒÄâºÏ³öµÄ½á¹û¶¼²»¶Ô¡£¡£Ì«¸ÐлÁË£¬ÄãÈÃÎÒ¾õµÃÊÀ½ç¶¼ÁÁÁË
ÓÐÃÎÒ»Æð×·
8Â¥2015-07-20 14:09:49
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

½ò½ò°®Ë¯¾õ

½ð³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
9Â¥: Originally posted by ÔÂÖ»À¶ at 2015-07-20 14:23:09
1stOptÈí¼þ´úÂ룺
Variable  x,y ;
Function x=1/(x2*49.005^2)*(ln((y/x1)*((x1-49.005)/(y-49.005)))-49.005*(1/y-1./x1));
Data;
         0   83.9499
    0.2500   69.1806
    0.5000   63.7801
     ...

ÕæµÄºÜллÄã¡£¡£ÊÚÖ®ÒÔÓã²»ÈçÊÚÖ®ÒÔÓæ¡£¡£°æÖ÷Á½Ñù¶¼¸æËßÁËÎÒ¡£¡£°æÖ÷°ô°ôßÕ£¡
ÓÐÃÎÒ»Æð×·
10Â¥2015-07-20 14:34:27
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ ½ò½ò°®Ë¯¾õ µÄÖ÷Ìâ¸üÐÂ
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