Solving two equations with ODE45
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Hi, I used the following command to solve one ODE
fun = @(x,y)[y(2);y(3);(y(1)*(1-x^2))];
y0 = [1 0 8]; %y, y', y''
xspan = [-3 3];
[X,Y] = ode45(fun,xspan,y0);
plot(X,Y(:,1)),,% X,Y(:,2),X,Y(:,3),X,Y(:,1).* (2 + X .^ 2));
However, I would like to solve this pair of equations instead of the given "fun":
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/171794/image.jpeg)
How do I add two equations in the fun line?
Thanks!
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Torsten
2018-4-4
fun=@(x,y)[y(2);y(3);-(1+x^2)*y(4);y(5);y(6);(1+x^2)*y(1)]; %psi2,psi2',psi2'',psi1,psi1',psi1''
Best wishes
Torsten.
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