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GENT113: Original Harwell sparse matrix test collection
statistical application

from set SMTAPE, from the Harwell-Boeing Collection

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


Due to Morven Gentleman, summer 1973


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Visualizations

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Structure Plot
structure plot


Matrix Statistics

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Size Type
113 x 113, 655 entries pattern unsymmetric
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
655 90 343 222 1066
Column Data Row Data
Average nonzeros per column : 5.8
Standard deviation : 5.6

indexnonzeros
longest14 27
shortest1 1

Average nonzeros per row : 5.8
Standard deviation : 4.6

indexnonzeros
longest23 20
shortest1 1

Bandwidths Profile Storage
lower102 upper96
average |i-j|38 std.dev.32
minmaxave.std.dev.
lower bandwidth0 101 26 35
upper bandwidth0 95 17 27

Nonsymmetric skyline storage 4739

Heaviest diagonals
offset from main0 -9 -2 3 6 -4 -3 -1 5 7
nonzeros90 24 14 12 12 11 10 10 8 8
accumulated percent13.7417.4019.5421.3723.2124.8926.4127.9429.1630.38

Top 10 out of 149 nonvoid diagonals.
Conditioning
Pattern matrix. No conditioning information.


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 13:33:51 US/Eastern 2004 [Comments: ]