  Complex systems have motivated continuing interest from the scientific
community, leading to new concepts and methods. Growing systems represent a
case of particular interest, as their topological, geometrical, and also
dynamical properties change along time, as new elements are incorporated into
the existing structure. In the present work, an approach is the case in which
systems grown radially around some straight axis of reference, such as particle
deposition on electrodes, or urban expansion along avenues, roads, coastline,
or rivers, among several other possibilities. More specifically, we aim at
characterizing the topological properties of simulated growing structures,
which are represented as graphs, in terms of a measurement corresponding to the
accessibility of each involved node. The incorporation of new elements (nodes
and links) is performed preferentially to the angular orientation respectively
to the reference axis. Several interesting results are reported, including the
tendency of structures grown preferentially to the orientation normal to the
axis to have smaller accessibility.
