rk2 object

(Shortest import: from brian2 import rk2)

brian2.stateupdaters.explicit.rk2 = ExplicitStateUpdater('''__k = dt*__f(__x, __t) x_new = __x + dt*__f(0.5*__k + __x, __t + 0.5*dt)''', stochastic=None)

Second order Runge-Kutta method (midpoint method)