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JAGMESH4: 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
1440 x 1440, 5472 entries pattern symmetric indefinite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
9504 1440 4032 4032 0
Column Data Row Data
Average nonzeros per column : 6.6
Standard deviation : 0.81

indexnonzeros
longest2 7
shortest424 3

Average nonzeros per row : 6.6
Standard deviation : 0.81

indexnonzeros
longest2 7
shortest424 3

Bandwidths Profile Storage
lower1409 upper1409
average |i-j|19 std.dev.90
minmaxave.std.dev.
lower bandwidth1 1409 32 1.2e+02
upper bandwidth1 1409 32 1.2e+02

Symmetric skyline storage requirement:45905

Heaviest diagonals
offset from main0 -1 1 -6 6 -5 5 -4 4 -7
nonzeros1440 1229 1229 352 352 288 288 224 224 192
accumulated percent15.1528.0841.0144.7248.4251.4554.4856.8459.2061.22

Top 10 out of 257 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: ]