The derivative function of the Lotka-Volterra model, an example of a two-dimensional autonomous ODE system.
lotkaVolterra(t, y, parameters)Returns a list containing the values of the two
derivatives at
(t, x, y).
The value of t, the independent
variable, to evaluate the derivative at. Should be a
numeric vector of
length one.
The values of x and
y, the dependent variables, to evaluate
the derivative at. Should be a numeric
vector of length two.
The values of the parameters of the system. Should be a
numeric vector with parameters
specified in the following order:
λ,
ε,
η,
δ.
Michael J Grayling
lotkaVolterra evaluates the derivative of the following ODE at the
point (t, x, y):
Its format is designed to be compatible with ode from
the deSolve package.
ode