Matrix GRE 115

GRE 115: Simulation of computer systems

from set GRENOBLE, from the Harwell-Boeing Collection

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Compressed MatrixMarket format file: gre__115.mtx.gz (1916 bytes)

Compressed Harwell-Boeing format file: gre__115.rua.gz (1723 bytes)

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Visualizations

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Structure Plot	City Plot

Spectral Portrait	3D Interactive City Plot
	[ VRML Version 2, gzipped ] 53023 bytes

Size Type

115 x 115, 421 entries real unsymmetric

Nonzeros

total diagonal below diagonal above diagonal A-A'
421 115 204 102 534

Column Data Row Data

Average nonzeros per column : 3.7
Standard deviation : 1.3
index nonzeros
longest 1 7
shortest 29 2
Average nonzeros per row : 3.7
Standard deviation : 0.98
index nonzeros
longest 1 7
shortest 29 2

Bandwidths Profile Storage

lower 40 upper 102
average |i-j| 22 std.dev. 23

min max ave. std.dev.
lower bandwidth 1 40 27 10
upper bandwidth 1 102 34 35
Nonsymmetric skyline storage 6962

Heaviest diagonals

offset from main 0 -37 -34 -36 -30 -32 -33 -31 -19 -38
nonzeros 115 18 12 11 11 10 8 8 8 7
accumulated percent 27.32 31.59 34.44 37.05 39.67 42.04 43.94 45.84 47.74 49.41

Top 10 out of 104 nonvoid diagonals.

Conditioning

Frobenius norm 7.2 condition number (est.) 1.5e+02
2-norm (est.) 1 diagonal dominance no

Set Information

Set GRENOBLE
Source:	François Cachard, University of Grenoble, France.
Discipline:	Simulation studies in computer systems.
Accession:	June 3, 1981

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

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Last change in this page: Wed Sep 22 13:33:39 US/Eastern 2004 [Comments: ]