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The Matrix Market (MM) exchange formats provide a simple mechanism
to facilitate the exchange of matrix data. In particular, the
objective has been to define a minimal base ASCII file format which
can be very easily explained and parsed, but can easily adapted to
applications with a more rigid structure, or extended to related
data objects. The MM exchange format for matrices is really a
collection of affiliated formats which share design elements. In the
initial specification, two matrix formats are defined.
Coordinate Format - A file format suitable for representing general
sparse matrices. Only nonzero entries are provided, and the coordinates
of each nonzero entry is given explicitly.
Array Format - A file format suitable for representing general dense
matrices. All entries are provided in a pre-defined (column-oriented)
order.