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LSHP 406: 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
406 x 406, 1561 entries pattern symmetric indefinite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
2716 406 1155 1155 0
Column Data Row Data
Average nonzeros per column : 6.7
Standard deviation : 0.74

indexnonzeros
longest1 7
shortest6 4

Average nonzeros per row : 6.7
Standard deviation : 0.74

indexnonzeros
longest1 7
shortest6 4

Bandwidths Profile Storage
lower395 upper395
average |i-j|20 std.dev.55
minmaxave.std.dev.
lower bandwidth1 395 34 72
upper bandwidth1 395 34 72

Symmetric skyline storage requirement:13630

Heaviest diagonals
offset from main0 -1 1 -2 2 -3 3 -6 6 -11
nonzeros406 334 334 128 128 60 60 54 54 49
accumulated percent14.9527.2539.5444.2648.9751.1853.3955.3857.3659.17

Top 10 out of 253 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: ]