  This is the second in a series of papers on implementing a discontinuous
Galerkin (DG) method as an open source Matlab / GNU Octave toolbox. The
intention of this ongoing project is to offer a rapid prototyping package for
application development using DG methods. The implementation relies on fully
vectorized matrix / vector operations and is comprehensively documented.
Particular attention was paid to maintaining a direct mapping between
discretization terms and code routines as well as to supporting the full code
functionality in GNU Octave. The present work focuses on a two-dimensional
time-dependent linear advection equation with space / time-varying
coefficients, and provides a general order implementation of several slope
limiting schemes for the DG method.
