BP 0: Original Harwell sparse matrix test collection
Simplex method basis matrix

from set SMTAPE, from the Harwell-Boeing Collection

Download as

Compressed MatrixMarket format file: bp_____0.mtx.gz (17817 bytes)
Compressed Harwell-Boeing format file: bp_____0.rua.gz (13363 bytes)

Visualizations

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

Structure Plot	City Plot
	3D Interactive City Plot
	[ VRML Version 2, gzipped ] 410144 bytes

Matrix Statistics

Size	Type
822 x 822, 3276 entries	real unsymmetric
Nonzeros
total diagonal below diagonal above diagonal A-A' 3276 1 793 2482 6516
Column Data	Row Data
Average nonzeros per column : 4 Standard deviation : 3.2 index nonzeros longest 723 20 shortest 1 1	Average nonzeros per row : 4 Standard deviation : 11 index nonzeros longest 1 266 shortest 2 1
Bandwidths	Profile Storage
lower 517 upper 821 average |i-j| 2.9e+02 std.dev. 2e+02	min max ave. std.dev. lower bandwidth 0 516 1.3e+02 1.6e+02 upper bandwidth 0 820 2.5e+02 2.6e+02 Nonsymmetric skyline storage 311507
Heaviest diagonals
offset from main -88 -181 -413 -229 -465 -327 320 100 106 105 nonzeros 41 37 34 30 25 24 20 18 18 17 accumulated percent 1.25 2.38 3.42 4.33 5.10 5.83 6.44 6.99 7.54 8.06 Top 10 out of 898 nonvoid diagonals.
Conditioning
Frobenius norm 9.8e+02 condition number (est.) 2e+07 2-norm (est.) 4e+02 diagonal dominance no

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Last change in this page: Wed Sep 22 13:33:52 US/Eastern 2004 [Comments: ]