BP 1000: 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__1000.mtx.gz (27253 bytes)
Compressed Harwell-Boeing format file: bp__1000.rua.gz (19700 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 ] 143888 bytes

Matrix Statistics

Size	Type
822 x 822, 4661 entries	real unsymmetric
Nonzeros
total diagonal below diagonal above diagonal A-A' 4661 4 1801 2856 9268
Column Data	Row Data
Average nonzeros per column : 5.7 Standard deviation : 4.1 index nonzeros longest 739 21 shortest 1 1	Average nonzeros per row : 5.7 Standard deviation : 12 index nonzeros longest 1 308 shortest 2 1
Bandwidths	Profile Storage
lower 796 upper 821 average |i-j| 2.9e+02 std.dev. 1.9e+02	min max ave. std.dev. lower bandwidth 0 795 2.2e+02 2.1e+02 upper bandwidth 0 820 2.5e+02 2.5e+02 Nonsymmetric skyline storage 390941
Heaviest diagonals
offset from main -229 -181 -88 -329 -413 -327 -411 320 100 -465 nonzeros 23 23 22 20 19 19 17 17 16 14 accumulated percent 0.49 0.99 1.46 1.89 2.30 2.70 3.07 3.43 3.78 4.08 Top 10 out of 1285 nonvoid diagonals.
Conditioning
Frobenius norm 1.1e+03 condition number (est.) 6.8e+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: ]