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SHL 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 ] 208575 bytes


Matrix Statistics

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Size Type
663 x 663, 1726 entries real unsymmetric
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
1726 6 226 1494 3440
Column Data Row Data
Average nonzeros per column : 2.6
Standard deviation : 0.89

indexnonzeros
longest5 4
shortest1 1

Average nonzeros per row : 2.6
Standard deviation : 17

indexnonzeros
longest1 440
shortest4 1

Bandwidths Profile Storage
lower539 upper662
average |i-j|2.4e+02 std.dev.1.6e+02
minmaxave.std.dev.
lower bandwidth0 538 1.1e+02 2e+02
upper bandwidth0 661 2.9e+02 2.1e+02

Nonsymmetric skyline storage 264818

Heaviest diagonals
offset from main-534 188 187 182 189 185 190 183 126 186
nonzeros112 43 40 32 32 30 30 27 26 26
accumulated percent 6.49 8.9811.3013.1515.0116.7418.4820.0521.5523.06

Top 10 out of 634 nonvoid diagonals.
Conditioning
Frobenius norm9.4e+03 condition number (est.)2e+07
2-norm (est.)9.4e+03 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: ]