The derivative function of an example two-dimensional autonomous ODE system.
example13(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. Not used here.
Michael J Grayling
example13 evaluates the derivatives of the following coupled ODE
system at the point (t, x, y):
dx/dt = 2 - x2 - y2, dy/dt = x2 - y2.
Its format is designed to be compatible with ode from
the deSolve package.
ode