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Harwell-Boeing is a format for the storage of sparse numeric matrix data.

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

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

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

$303633$