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BP 200: Original Harwell sparse matrix test collection
Simplex method basis matrix

from set SMTAPE, from the Harwell-Boeing Collection

[Download] [Visualizations] [Matrix Statistics] [Set Information]


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Visualizations

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Structure Plot City Plot
structure plot city plot
3D Interactive City Plot

[ VRML Version 2, gzipped ] 479097 bytes


Matrix Statistics

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Size Type
822 x 822, 3802 entries real unsymmetric
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
3802 2 1172 2628 7576
Column Data Row Data
Average nonzeros per column : 4.6
Standard deviation : 3.6

indexnonzeros
longest739 21
shortest1 1

Average nonzeros per row : 4.6
Standard deviation : 11

indexnonzeros
longest1 283
shortest2 1

Bandwidths Profile Storage
lower777 upper821
average |i-j|2.8e+02 std.dev.1.9e+02
minmaxave.std.dev.
lower bandwidth0 776 1.7e+02 1.9e+02
upper bandwidth0 820 2.5e+02 2.6e+02

Nonsymmetric skyline storage 346290

Heaviest diagonals
offset from main-181 -88 -413 -229 -465 320 -327 106 100 105
nonzeros34 34 33 28 22 21 19 19 18 16
accumulated percent 0.89 1.79 2.66 3.39 3.97 4.52 5.02 5.52 6.00 6.42

Top 10 out of 1086 nonvoid diagonals.
Conditioning
Frobenius norm9.9e+02 condition number (est.)8.9e+06
2-norm (est.)4e+02 diagonal dominanceno


Set Information

Set SMTAPE
Source: Harwell Laboratory, England.
Discipline:Variety of disciplines
Accession:Summer 1978


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Last change in this page: Wed Sep 22 13:33:52 US/Eastern 2004 [Comments: ]