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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
structure plot city plot
Spectral Portrait 3D Interactive City Plot
spectral portrait

[ VRML Version 2, gzipped ] 125991 bytes


Matrix Statistics

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Size Type
434 x 434, 4710 entries real unsymmetric
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
4182 434 1835 1913 2740
Column Data Row Data
Average nonzeros per column : 9.6
Standard deviation : 3.1

indexnonzeros
longest434 26
shortest211 3

Average nonzeros per row : 9.6
Standard deviation : 3.9

indexnonzeros
longest427 32
shortest1 4

Bandwidths Profile Storage
lower422 upper244
average |i-j|85 std.dev.1e+02
minmaxave.std.dev.
lower bandwidth0 421 1.2e+02 1.1e+02
upper bandwidth0 243 1.1e+02 1e+02

Nonsymmetric skyline storage 98316

Heaviest diagonals
offset from main0 -2 2 -3 3 -1 1 -5 5 -4
nonzeros434 220 220 154 154 149 149 134 134 57
accumulated percent10.3815.6420.9024.5828.2631.8335.3938.5941.8043.16

Top 10 out of 333 nonvoid diagonals.
Conditioning
Frobenius norm2.1 condition number (est.)1.3e+05
2-norm (est.)0.66 diagonal dominanceno


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: ]