Matrix LSHP2233

LSHP2233: Graded L-shape patterns

from set LSHAPE, from the Harwell-Boeing Collection

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

Download as

Compressed MatrixMarket format file: lshp2233.mtx.gz (19476 bytes)

Compressed Harwell-Boeing format file: lshp2233.psa.gz (18297 bytes)

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Visualizations

Click on image to get an enlarged version. Click on label to get an explanation.

Structure Plot

Size Type

2233 x 2233, 8785 entries pattern symmetric indefinite

Nonzeros

total diagonal below diagonal above diagonal A-A'
15337 2233 6552 6552 0

Column Data Row Data

Average nonzeros per column : 6.9
Standard deviation : 0.5
index nonzeros
longest 1 7
shortest 13 4
Average nonzeros per row : 6.9
Standard deviation : 0.5
index nonzeros
longest 1 7
shortest 13 4

Bandwidths Profile Storage

lower 2208 upper 2208
average |i-j| 49 std.dev. 2e+02

min max ave. std.dev.
lower bandwidth 1 2208 84 2.6e+02
upper bandwidth 1 2208 84 2.6e+02
Symmetric skyline storage requirement:187412

Heaviest diagonals

offset from main 0 -1 1 -9 9 -8 8 -7 7 -6
nonzeros 2233 1951 1951 510 510 450 450 390 390 330
accumulated percent 14.56 27.28 40.00 43.33 46.65 49.59 52.52 55.06 57.61 59.76

Top 10 out of 819 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: ]