Matrix GRE 216B

GRE 216B: Simulation of computer systems

from set GRENOBLE, from the Harwell-Boeing Collection

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Compressed MatrixMarket format file: gre_216b.mtx.gz (3167 bytes)

Compressed Harwell-Boeing format file: gre_216b.rua.gz (2672 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 ] 103651 bytes

Size Type

216 x 216, 876 entries real unsymmetric

Nonzeros

total diagonal below diagonal above diagonal A-A'
812 152 480 180 1320

Column Data Row Data

Average nonzeros per column : 3.8
Standard deviation : 0.47
index nonzeros
longest 6 4
shortest 1 2
Average nonzeros per row : 3.8
Standard deviation : 0.47
index nonzeros
longest 6 4
shortest 1 2

Bandwidths Profile Storage

lower 15 upper 37
average |i-j| 12 std.dev. 10

min max ave. std.dev.
lower bandwidth 1 15 11 3.3
upper bandwidth 1 37 24 13
Nonsymmetric skyline storage 7346

Heaviest diagonals

offset from main 0 -12 -10 -11 -9 -13 -8 -7 -6 36
nonzeros 152 70 64 62 58 50 36 36 30 24
accumulated percent 18.72 27.34 35.22 42.86 50.00 56.16 60.59 65.02 68.72 71.67

Top 10 out of 29 nonvoid diagonals.

Conditioning

Frobenius norm 14 condition number (est.) 8.1e+14
2-norm (est.) 1.4 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: ]