  The spectrum of magnetic edge states and their transport properties in the
presence of a perpendicular non-homogeneous magnetic field in a quantum wire
formed by a parabolic confining potential are obtained. Systems are studied
where the magnetic field exhibits a discontinuous jump in the transverse
direction and changes its sign, strength, and both sign and strength at the
magnetic interface. The energy spectra and wave functions of these systems, the
corresponding group velocities along the interface and the particle average
positions normal to the interface are calculated. The resistance of the quantum
wire in the presence of such a magnetic interface is obtained both in the
ballistic and the diffusive regimes as a function of the Fermi energy and of
the homogeneous background magnetic field. The results are compared with those
for the case of a homogeneous field.
