|Harwell-Boeing matrix format.|
Used for exchanging and storing sparse matrices.
Plain text format.
File format of the Harwell-Boeing collection of standard test matrices.
The three-letter file extension encodes matrix properties that are also represented in the file.
The first letter of the file extension encodes the data type: "r" (real), "c" (complex), or "p" (pattern).
The second letter denotes the symmetry property: "s" (symmetric), "u" (unsymmetric), "h" (Hermitian), "z" (skew-symmetric), or "r" (rectangular).
The third letter of the file extension is either "a" (assembled) or "e" (elemental unassembled).
Stores matrices in a sparse representation.
Developed in 1992 by Iain Duff, Roger Grimes and John Lewis.
|"Elements"||list of elements and options available in this file|
|"Rules"||full list of rules for each element and option|
|"Options"||list of rules for options, properties and settings|
|"Data"||matrix data given as a sparse array|
|"Graphics"||a visual representation of the values of the matrix elements|
|"Key"||document identification string|
|"MatrixStructure"||symmetry properties of the matrix|
Import a Harwell-Boeing matrix file and render it as graphics:
Read the same file as a sparse array:
Import a sparse matrix and render it as a GraphPlot:
This exports a 1-by-2 matrix to the Harwell-Boeing format:
Import the previous output:
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