我想根据y函数的初始条件求系数u0,v0 下面是我用matlab写的代码,但一直报错.郁闷死.syms a b t u0 v0a=1;b=2;y=a*u0*t+b*v0*(t+1)^2;dy=diff(y,t);y0=subs(y,t,0);dy0=subs(dy,t,0);[u0,v0]=solve('y0=2','y0=4','u0,v0');最后一行
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![我想根据y函数的初始条件求系数u0,v0 下面是我用matlab写的代码,但一直报错.郁闷死.syms a b t u0 v0a=1;b=2;y=a*u0*t+b*v0*(t+1)^2;dy=diff(y,t);y0=subs(y,t,0);dy0=subs(dy,t,0);[u0,v0]=solve('y0=2','y0=4','u0,v0');最后一行](/uploads/image/z/7000400-56-0.jpg?t=%E6%88%91%E6%83%B3%E6%A0%B9%E6%8D%AEy%E5%87%BD%E6%95%B0%E7%9A%84%E5%88%9D%E5%A7%8B%E6%9D%A1%E4%BB%B6%E6%B1%82%E7%B3%BB%E6%95%B0u0%2Cv0+%E4%B8%8B%E9%9D%A2%E6%98%AF%E6%88%91%E7%94%A8matlab%E5%86%99%E7%9A%84%E4%BB%A3%E7%A0%81%2C%E4%BD%86%E4%B8%80%E7%9B%B4%E6%8A%A5%E9%94%99.%E9%83%81%E9%97%B7%E6%AD%BB.syms+a+b+t+u0+v0a%3D1%3Bb%3D2%3By%3Da%2Au0%2At%2Bb%2Av0%2A%28t%2B1%29%5E2%3Bdy%3Ddiff%28y%2Ct%29%3By0%3Dsubs%28y%2Ct%2C0%29%3Bdy0%3Dsubs%28dy%2Ct%2C0%29%3B%5Bu0%2Cv0%5D%3Dsolve%28%27y0%3D2%27%2C%27y0%3D4%27%2C%27u0%2Cv0%27%29%3B%E6%9C%80%E5%90%8E%E4%B8%80%E8%A1%8C)
我想根据y函数的初始条件求系数u0,v0 下面是我用matlab写的代码,但一直报错.郁闷死.syms a b t u0 v0a=1;b=2;y=a*u0*t+b*v0*(t+1)^2;dy=diff(y,t);y0=subs(y,t,0);dy0=subs(dy,t,0);[u0,v0]=solve('y0=2','y0=4','u0,v0');最后一行
我想根据y函数的初始条件求系数u0,v0 下面是我用matlab写的代码,但一直报错.郁闷死.
syms a b t u0 v0
a=1;
b=2;
y=a*u0*t+b*v0*(t+1)^2;
dy=diff(y,t);
y0=subs(y,t,0);
dy0=subs(dy,t,0);
[u0,v0]=solve('y0=2','y0=4','u0,v0');
最后一行写错了[u0,v0]=solve('y0=2','dy0=4','u0,v0');
我想根据y函数的初始条件求系数u0,v0 下面是我用matlab写的代码,但一直报错.郁闷死.syms a b t u0 v0a=1;b=2;y=a*u0*t+b*v0*(t+1)^2;dy=diff(y,t);y0=subs(y,t,0);dy0=subs(dy,t,0);[u0,v0]=solve('y0=2','y0=4','u0,v0');最后一行
你的函数是y = u0*t + 2*v0*(t+1)^2
初始条件是y(0) = 2, y'(0) = 4
对不?
我改了下,最后一行,改成 [u0,v0]=solve('y0=2','dy0=4');
结果就是,
u0 =
4
v0 =
2
>> y0
y0 =
2*v0
>> dy0
dy0 =
u0 + 4*v0
我的matlab版本 R2009a
matlab是什么编程语言???
syms a b t u0 v0
a=1;
b=2;
y=a*u0*t+b*v0*(t+1)^2;
dy=diff(y,t);
y0=subs(y,t,0);
dy0=subs(dy,t,0);
[u0,v0]=solve(y0-2,dy0-4,'u0','v0')
u0 =
0
...
全部展开
syms a b t u0 v0
a=1;
b=2;
y=a*u0*t+b*v0*(t+1)^2;
dy=diff(y,t);
y0=subs(y,t,0);
dy0=subs(dy,t,0);
[u0,v0]=solve(y0-2,dy0-4,'u0','v0')
u0 =
0
v0 =
1
收起