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logyquan

Òø³æ (СÓÐÃûÆø)

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df1=diff(F, x(1))=0
df2=diff(F, x(2))=0
ÒԵõ½x(1)£¬x(2)µÄ½â
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d1=560
d2=4500
p=40000
h1=12
h2=10
h0=3
s1=240
s2=600
sp=5500
s01=320
s02=1000
d0=d1+d2
syms x(1) x(2);
F=(sp+(s01+s1)* x(1)+(s02+s2)* x(2))*((( x(1)-1)*h0+h1)*d1/(x(1)*d0)+(( x(2)-1)*h0+h2)*d2/(x(2)*d0)-( x(1)-2)*d1*h0/(x(1)*p)-( x(2)-2)*d2*h0/(x(2)*p))
df1=diff(F, x(1))
df2=diff(F, x(2))
fun=inline('df1,df2', 'x');
x0=[1;1];
x=fsolve('fun',x0)
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logyquan

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
Originally posted by flyinuniverse58 at 2010-06-03 05:55:30:
I think the problem is the misusing of 'syms'.
'Syms' doesn't support the variable parameter array.
You could try to change all the x(1), x(2) to x1, x2.

If you want to use variable parameter  ...

Çë½ÌÒ»¸ö½â¶þÔª·ÇÏßÐÔ·½³Ì×éµÄMATLAB³ÌÐò£¬ÌâÄ¿ÈçÏ£¬·Ç³£¸Ðл¸ßÈËÏàÖú,ÒªÌṩ³ÌÐò¾ÍºÃÁË¡£( ÏÂͼÖУ¬È¥µô¡°½âÏÂÁС±£©

  

[ Last edited by logyquan on 2010-6-4 at 13:12 ]
7Â¥2010-06-04 13:11:28
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flyinuniverse58

ľ³æ (ÕýʽдÊÖ)

¡ï ¡ï
Сľ³æ(½ð±Ò+0.5):¸ø¸öºì°ü£¬Ð»Ð»»ØÌû½»Á÷
adu886886(½ð±Ò+1):3k u 2010-06-03 14:07:37
I think the problem is the misusing of 'syms'.
'Syms' doesn't support the variable parameter array.
You could try to change all the x(1), x(2) to x1, x2.

If you want to use variable parameter as array, you can try another software, name is 1stopt.
2Â¥2010-06-03 05:55:30
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

flyinuniverse58

ľ³æ (ÕýʽдÊÖ)

zzuwangshilei:¿ÉÒÔÉèÖÃÇøÓòÓïÑÔÑ¡Ïî 2010-06-03 09:47:18
I am very sorry that my computer cannot input Chinese, because this is the office computer.
3Â¥2010-06-03 05:56:24
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zzuwangshilei

ľ³æ (ÕýʽдÊÖ)

¡ï ¡ï
Сľ³æ(½ð±Ò+0.5):¸ø¸öºì°ü£¬Ð»Ð»»ØÌû½»Á÷
adu886886(½ð±Ò+1):ÐÁ¿àÁË 2010-06-03 14:07:20
ÒýÓûØÌû:
Originally posted by flyinuniverse58 at 2010-06-03 05:55:30:
I think the problem is the misusing of 'syms'.
'Syms' doesn't support the variable parameter array.
You could try to change all the x(1), x(2) to x1, x2.

If you want to use variable parameter  ...

°ïÂ¥Ö÷·­Ò»Ï£º
ÎÒÈÏΪÎÊÌâÔÚÓÚÎÞ·¨Ê¹ÓÃ'syms'.
'syms'²»Ö§³Ö±äÁ¿²ÎÊý¾ØÕó.
ÄãÓ¦µ±ÊÔ׎«X£¨1£©£¬x(2)¸ÄΪX1£¬X2£¬¿´ÊÇ·ñ¿ÉÐС£

ÆäËû·½·¨ÊÇ£¬Ê¹ÓÃÆäËûµÄÈí¼þ1stopt.
4Â¥2010-06-03 09:52:03
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