MatrixMarket is a format for the storage of dense or sparse numeric matrix data.

This open format was created and is used by the National Institute of Standards and Technology (NIST).

The commands Import, Export, ImportMatrix, and ExportMatrix can read and write to the MatrixMarket format.

$H≔\mathrm{Import}\left(''example/hilbert100.mtx''\,\mathrm{base}=\mathrm{datadir}\right)$

$M≔\mathrm{LinearAlgebra}:-\mathrm{RandomMatrix}\left(100\,\mathrm{datatype}=\mathrm{float}\left[8\right]\right)\:$

$\mathrm{Export}\left(''example.mtx''\,M\,\mathrm{base}=\mathrm{homedir}\right)$

$234927$