.. currentmodule:: brian Random processes ---------------- To import the random processes library:: from brian.library.random_processes import * For the moment, only the Ornstein-Uhlenbeck process has been included. The function :func:`OrnsteinUhlenbeck` returns an :class:`Equations` object. The following example defines a membrane equation with an Ornstein-Uhlenbeck current ``I`` (= coloured noise):: eqs=Equations('dv/dt=-v/tau+I/C : volt') eqs+=OrnsteinUhlenbeck('I',mu=1*nA,sigma=2*nA,tau=10*ms) where ``mu`` is the mean of the current, ``sigma`` is the standard deviation and ``tau`` is autocorrelation time constant.