作业帮matlab求解常微分方程组数值解,总出现这个,急死了我输入function dy=rigid(t,y) ；dy=zeros(3,1);dy(1)=y(2)*y(3);dy(2)=-y(1)*y(3);dy(3)=-0.51*y(1)*y(2);运行[T,Y]=ode45('rigid',[0 12],[0 1 1]);后总出现Error using ==> fevalUndefi
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![matlab求解常微分方程组数值解,总出现这个,急死了我输入function dy=rigid(t,y) ；dy=zeros(3,1);dy(1)=y(2)*y(3);dy(2)=-y(1)*y(3);dy(3)=-0.51*y(1)*y(2);运行[T,Y]=ode45('rigid',[0 12],[0 1 1]);后总出现Error using ==> fevalUndefi](/uploads/image/z/1582219-19-9.jpg?t=matlab%E6%B1%82%E8%A7%A3%E5%B8%B8%E5%BE%AE%E5%88%86%E6%96%B9%E7%A8%8B%E7%BB%84%E6%95%B0%E5%80%BC%E8%A7%A3%2C%E6%80%BB%E5%87%BA%E7%8E%B0%E8%BF%99%E4%B8%AA%2C%E6%80%A5%E6%AD%BB%E4%BA%86%E6%88%91%E8%BE%93%E5%85%A5function+dy%3Drigid%28t%2Cy%29+%EF%BC%9Bdy%3Dzeros%283%2C1%29%3Bdy%281%29%3Dy%282%29%2Ay%283%29%3Bdy%282%29%3D-y%281%29%2Ay%283%29%3Bdy%283%29%3D-0.51%2Ay%281%29%2Ay%282%29%3B%E8%BF%90%E8%A1%8C%5BT%2CY%5D%3Dode45%28%27rigid%27%2C%5B0+12%5D%2C%5B0+1+1%5D%29%3B%E5%90%8E%E6%80%BB%E5%87%BA%E7%8E%B0Error+using+%3D%3D%3E+fevalUndefi)
matlab求解常微分方程组数值解,总出现这个,急死了我输入function dy=rigid(t,y) ；dy=zeros(3,1);dy(1)=y(2)*y(3);dy(2)=-y(1)*y(3);dy(3)=-0.51*y(1)*y(2);运行[T,Y]=ode45('rigid',[0 12],[0 1 1]);后总出现Error using ==> fevalUndefi
matlab求解常微分方程组数值解,总出现这个,急死了
我输入function dy=rigid(t,y) ；
dy=zeros(3,1);
dy(1)=y(2)*y(3);
dy(2)=-y(1)*y(3);
dy(3)=-0.51*y(1)*y(2);
运行[T,Y]=ode45('rigid',[0 12],[0 1 1]);后总出现
Error using ==> feval
Undefined function or method 'rigid' for input arguments of type 'double'.
Error in ==> odearguments at 110
f0 = feval(ode,t0,y0,args{:}); % ODE15I sets args{1} to yp0.
Error in ==> ode45 at 173
[neq,tspan,ntspan,next,t0,tfinal,tdir,y0,f0,odeArgs,odeFcn,...
在0 1 1 中间加上分号吗?我试过了,还是不行啊
matlab求解常微分方程组数值解,总出现这个,急死了我输入function dy=rigid(t,y) ；dy=zeros(3,1);dy(1)=y(2)*y(3);dy(2)=-y(1)*y(3);dy(3)=-0.51*y(1)*y(2);运行[T,Y]=ode45('rigid',[0 12],[0 1 1]);后总出现Error using ==> fevalUndefi
[T,Y]=ode45('rigid',[0 12],[0;1;1]); %标点符号状态
plot(T,Y)
----------------------
function dy=rigid(t,y)
dy=zeros(3,1);
dy(1)=y(2)*y(3);
dy(2)=-y(1)*y(3);
dy(3)=-0.51*y(1)*y(2);