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LSHP3025: Graded L-shape patterns

from set LSHAPE, 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
3025 x 3025, 11929 entries pattern symmetric indefinite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
20833 3025 8904 8904 0
Column Data Row Data
Average nonzeros per column : 6.9
Standard deviation : 0.47

indexnonzeros
longest1 7
shortest15 4

Average nonzeros per row : 6.9
Standard deviation : 0.47

indexnonzeros
longest1 7
shortest15 4

Bandwidths Profile Storage
lower2996 upper2996
average |i-j|57 std.dev.2.5e+02
minmaxave.std.dev.
lower bandwidth1 2996 99 3.3e+02
upper bandwidth1 2996 99 3.3e+02

Symmetric skyline storage requirement:298309

Heaviest diagonals
offset from main0 -1 1 -11 11 -10 10 -9 9 -8
nonzeros3025 2683 2683 630 630 570 570 510 510 450
accumulated percent14.5227.4040.2843.3046.3349.0651.8054.2556.6958.85

Top 10 out of 977 nonvoid diagonals.
Conditioning
Pattern matrix. No conditioning information.


Set Information

Set LSHAPE
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 13:33:44 US/Eastern 2004 [Comments: ]