Matrix LSHP1882

LSHP1882: Graded L-shape patterns

from set LSHAPE, from the Harwell-Boeing Collection

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

Download as

Compressed MatrixMarket format file: lshp1882.mtx.gz (16399 bytes)

Compressed Harwell-Boeing format file: lshp1882.psa.gz (15610 bytes)

Help: My browser can't read the compressed data files. What now?

Visualizations

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

Structure Plot

Size Type

1882 x 1882, 7393 entries pattern symmetric indefinite

Nonzeros

total diagonal below diagonal above diagonal A-A'
12904 1882 5511 5511 0

Column Data Row Data

Average nonzeros per column : 6.9
Standard deviation : 0.52
index nonzeros
longest 1 7
shortest 12 4
Average nonzeros per row : 6.9
Standard deviation : 0.52
index nonzeros
longest 1 7
shortest 12 4

Bandwidths Profile Storage

lower 1859 upper 1859
average |i-j| 45 std.dev. 1.8e+02

min max ave. std.dev.
lower bandwidth 1 1859 77 2.3e+02
upper bandwidth 1 1859 77 2.3e+02
Symmetric skyline storage requirement:144178

Heaviest diagonals

offset from main 0 -1 1 -8 8 -7 7 -6 6 -5
nonzeros 1882 1630 1630 450 450 390 390 330 330 270
accumulated percent 14.58 27.22 39.85 43.34 46.82 49.85 52.87 55.42 57.98 60.07

Top 10 out of 737 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

The Matrix Market is a service of the Mathematical and Computational Sciences Division / Information Technology Laboratory / National Institute of Standards and Technology.

[ Home ] [ Search ] [ Browse ] [ Resources ]

Last change in this page: Wed Sep 22 13:33:44 US/Eastern 2004 [Comments: ]