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[ÇóÖú] matlabÇóÖú ÒÑÓÐ1È˲ÎÓë

¸÷λ´óÉñÎÒÏëÓÃode15s   Çó½âdy/dt=a-b*y-c*y^2    ²»ÖªµÀ¸ÃÔõôʵÏÖ¡£    ÇóÖú¸÷λ´óÉñÁË£¡£¡£¡
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¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
¼ÙÉè t=0ʱ£¬yµÄ³õÖµy0=0¡£·½³ÌÖÐa=1; b=2; c=3; ¾ßÌå´úÂëÈçÏ£º
CODE:
clear ll;clc
y0=0;
tspan=[0 10];
a=1;
b=2;
c=3;
[t y]=ode15s(@(t,y)  a-b*y-c*y^2,tspan,y0    );
[t y]
figure(1)
plot(t,y,'o-b')

¼ÆËã½á¹û£º
      t          y
         0         0
    0.0008    0.0008
    0.0016    0.0016
    0.0024    0.0024
    0.0070    0.0070
    0.0116    0.0115
    0.0162    0.0160
    0.0209    0.0204
    0.0488    0.0464
    0.0767    0.0707
    0.1046    0.0934
    0.1325    0.1146
    0.2052    0.1629
    0.2780    0.2019
    0.3508    0.2328
    0.4235    0.2569
    0.5404    0.2845
    0.6573    0.3022
    0.7741    0.3135
    0.8910    0.3208
    1.0079    0.3255
    1.1441    0.3287
    1.2804    0.3307
    1.4166    0.3318
    1.5529    0.3324
    1.6891    0.3328
    1.9423    0.3331
    2.1954    0.3333
    2.4485    0.3333
    2.7017    0.3334
    2.9548    0.3334
    3.8297    0.3334
    4.7045    0.3333
    5.5794    0.3333
    6.4543    0.3333
    7.4543    0.3333
    8.4543    0.3333
    9.4543    0.3333
   10.0000    0.3333

matlabÇóÖú
¸½Í¼1.png

MATLAB¡¢MSСÎÊÌâ¡¢ÆÕͨÎÊÌâÇë·¢ÌûÇóÖú£¡Ê±¼ä¾«Á¦ÓÐÏÞ£¬Ë¡²»½ÓÊÜÎÞ³¥Ë½ÐÅÇóÖú¡£
2Â¥2015-09-10 10:04:16
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
1
3Â¥2015-09-10 18:22:31
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

jjdg

°æÖ÷ (ÖªÃû×÷¼Ò)

ÓÅÐã°æÖ÷

ÒýÓûØÌû:
2Â¥: Originally posted by ÔÂÖ»À¶ at 2015-09-10 10:04:16
¼ÙÉè t=0ʱ£¬yµÄ³õÖµy0=0¡£·½³ÌÖÐa=1; b=2; c=3; ¾ßÌå´úÂëÈçÏ£º
clear ll;clc
y0=0;
tspan=;
a=1;
b=2;
c=3;
=ode15s(@(t,y)  a-b*y-c*y^2,tspan,y0    );

figure(1)
plot(t,y,'o-b')

¼ÆËã½á¹û£º
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