Matrix GRE 512

GRE 512: Simulation of computer systems

from set GRENOBLE, from the Harwell-Boeing Collection

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Compressed MatrixMarket format file: gre__512.mtx.gz (7608 bytes)

Compressed Harwell-Boeing format file: gre__512.rua.gz (6202 bytes)

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Visualizations

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

Structure Plot	City Plot

Spectral Portrait	3D Interactive City Plot
	[ VRML Version 2, gzipped ] 250371 bytes

Size Type

512 x 512, 2192 entries real unsymmetric

Nonzeros

total diagonal below diagonal above diagonal A-A'
1976 296 1232 448 3360

Column Data Row Data

Average nonzeros per column : 3.9
Standard deviation : 0.37
index nonzeros
longest 6 4
shortest 1 2
Average nonzeros per row : 3.9
Standard deviation : 0.37
index nonzeros
longest 6 4
shortest 1 2

Bandwidths Profile Storage

lower 25 upper 65
average |i-j| 21 std.dev. 18

min max ave. std.dev.
lower bandwidth 1 25 18 5.7
upper bandwidth 1 65 44 21
Nonsymmetric skyline storage 31227

Heaviest diagonals

offset from main 0 -22 -19 -20 -18 -21 -16 -15 -17 -23
nonzeros 296 136 126 104 104 96 90 68 60 58
accumulated percent 14.98 21.86 28.24 33.50 38.77 43.62 48.18 51.62 54.66 57.59

Top 10 out of 45 nonvoid diagonals.

Conditioning

Frobenius norm 12 condition number (est.) 3.8e+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

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Last change in this page: Wed Sep 22 13:33:40 US/Eastern 2004 [Comments: ]