Hey Folks.
I was just wondering if there was an existing package or tool for plotting the phase portrait of a system of differential equations, or a phase portrait plus direction field? I am thinking of a plot like this for the system of equations.
\frac{dx}{dt} = -x \\
\frac{dy}{dt} = 2y
The corresponding plot would be (taken from Haberman’s ODE textbook):
I did not see any mention of this in the plots documentation for the Julia DifferentialEquations package, but perhaps the plot is in a different package.
It is not too bad to develop a plot like this myself, but just was wondering if anyone already had developed this–since it is such a common plot for differential equations.
Note that there was a previous post on this topic, but I don’t believe it received a response.