Matrix HOR 131

HOR 131: Flow network problem

from set NNCENG, from the Harwell-Boeing Collection

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Visualizations

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Structure Plot	City Plot

Spectral Portrait	3D Interactive City Plot
	[ VRML Version 2, gzipped ] 125991 bytes

Size Type

434 x 434, 4710 entries real unsymmetric

Nonzeros

total diagonal below diagonal above diagonal A-A'
4182 434 1835 1913 2740

Column Data Row Data

Average nonzeros per column : 9.6
Standard deviation : 3.1
index nonzeros
longest 434 26
shortest 211 3
Average nonzeros per row : 9.6
Standard deviation : 3.9
index nonzeros
longest 427 32
shortest 1 4

Bandwidths Profile Storage

lower 422 upper 244
average |i-j| 85 std.dev. 1e+02

min max ave. std.dev.
lower bandwidth 0 421 1.2e+02 1.1e+02
upper bandwidth 0 243 1.1e+02 1e+02
Nonsymmetric skyline storage 98316

Heaviest diagonals

offset from main 0 -2 2 -3 3 -1 1 -5 5 -4
nonzeros 434 220 220 154 154 149 149 134 134 57
accumulated percent 10.38 15.64 20.90 24.58 28.26 31.83 35.39 38.59 41.80 43.16

Top 10 out of 333 nonvoid diagonals.

Conditioning

Frobenius norm 2.1 condition number (est.) 1.3e+05
2-norm (est.) 0.66 diagonal dominance no

Set Information

Set NNCENG
Source:	R.P. Hornby, R&D Technology Department, National Nuclear Corporation, Ltd., Risley, Cheshire, England.
Discipline:	Flow in networks
Accession:	January 1983

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Last change in this page: Wed Sep 22 13:33:46 US/Eastern 2004 [Comments: ]