BP 800: 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___800.mtx.gz (26508 bytes)
Compressed Harwell-Boeing format file: bp___800.rua.gz (19238 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 ] 140485 bytes

Matrix Statistics

Size	Type
822 x 822, 4534 entries	real unsymmetric
Nonzeros
total diagonal below diagonal above diagonal A-A' 4534 4 1680 2850 9034
Column Data	Row Data
Average nonzeros per column : 5.5 Standard deviation : 4.1 index nonzeros longest 739 21 shortest 1 1	Average nonzeros per row : 5.5 Standard deviation : 12 index nonzeros longest 1 304 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 2.1e+02 2e+02 upper bandwidth 0 820 2.5e+02 2.5e+02 Nonsymmetric skyline storage 380679
Heaviest diagonals
offset from main -88 -229 -181 -413 -327 -329 320 -465 -411 100 nonzeros 27 24 24 21 19 18 18 17 16 16 accumulated percent 0.60 1.12 1.65 2.12 2.54 2.93 3.33 3.71 4.06 4.41 Top 10 out of 1241 nonvoid diagonals.
Conditioning
Frobenius norm 1.1e+03 condition number (est.) 1.2e+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: ]