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ABB313: Original Harwell sparse matrix test collection
Survey of Sudan

from set SMTAPE, from the Harwell-Boeing Collection

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


Due to Abbas, 1974.


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Visualizations

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Structure Plot
structure plot


Matrix Statistics

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Size Type
313 x 176, 1557 entries pattern unsymmetric
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
1557 1 1415 141 N/A
Column Data Row Data
Average nonzeros per column : 8.8
Standard deviation : 3.9

indexnonzeros
longest55 26
shortest114 2

Average nonzeros per row : 5
Standard deviation : 0.85

indexnonzeros
longest33 6
shortest1 1

Bandwidths Profile Storage
lower205 upper114
average |i-j|97 std.dev.55
minmaxave.std.dev.
lower bandwidth0 204 1.1e+02 58
upper bandwidth0 113 5.6 21

Nonsymmetric skyline storage N/A

Heaviest diagonals
offset from main-97 -182 -66 -54 -18 -149 -132 -131 -124 -123
nonzeros12 11 11 11 11 10 10 10 10 10
accumulated percent 0.77 1.48 2.18 2.89 3.60 4.24 4.88 5.52 6.17 6.81

Top 10 out of 318 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 13:33:53 US/Eastern 2004 [Comments: ]