Function of ODE can not be executed well.

When I call and execute this function,I get an error.

function dy = myODE(~,y)
dy(1) = y(2);
dy(2) = y(1)*y(2)-2;
end

%code start

[t,y] = ode23(@vdp1,[0 20],[2; 0]);

%code end

Answer 1

[James Tursa]

Make sure the derivative function returns a column vector. E.g.,

function dy = myODE(~,y)
dy = zeros(2,1);  % <-- column vector
dy(1) = y(2);
dy(2) = y(1)*y(2)-2;
end