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JAGMESH1: Graded L-shape patterns
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from set JAGMESH, from the Harwell-Boeing Collection

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Visualizations

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Structure Plot
structure plot

Matrix Statistics

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Size Type
936 x 936, 3600 entries pattern symmetric indefinite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
6264 936 2664 2664 0
Column Data Row Data
Average nonzeros per column : 6.7
Standard deviation : 0.73

indexnonzeros
longest14 7
shortest1 4

Average nonzeros per row : 6.7
Standard deviation : 0.73

indexnonzeros
longest14 7
shortest1 4

Bandwidths Profile Storage
lower779 upper779
average |i-j|25 std.dev.72
minmaxave.std.dev.
lower bandwidth1 779 41 93
upper bandwidth1 779 41 93

Symmetric skyline storage requirement:38176
Heaviest diagonals
offset from main0 -1 1 -9 9 -8 8 -7 7 -6
nonzeros936 824 824 204 204 180 180 156 156 132
accumulated percent14.9428.1041.2544.5147.7750.6453.5156.0058.4960.60

Top 10 out of 359 nonvoid diagonals.
Conditioning
Pattern matrix. No conditioning information.

Set Information

Set JAGMESH
Source: Alan George, University of Waterloo, Canada.
Discipline:Finite-element model problem
Accession:January 1978

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Last change in this page: Wed Sep 22 13:33:40 US/Eastern 2004 [Comments: ]