In this paper, the dimension function of a self-affine generalized scaling set associated with an
n\,\times \,n integral expansive dilation
A is studied. More specifically, we consider the dimension function of an
A-dilation generalized scaling set
K assuming that
K is a self-affine tile satisfying
BK\,=\,\left( K\,+\,{{d}_{1}} \right)\,\cup \,\left( K\,+\,{{d}_{2}} \right), where
B\,=\,{{A}^{t}},\,A is an
n\,\times \,n integral expansive matrix with
\left| \det \,A \right|\,=\,2, and
{{d}_{1}},\,{{d}_{2}}\,\in \,{{\mathbb{R}}^{n}}. We show that the dimension function of
K must be constant if either
n\,=1 or 2 or one of the digits is 0, and that it is bounded by
2\left| K \right| for any
n.