BP 600: 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___600.mtx.gz (24117 bytes)
Compressed Harwell-Boeing format file: bp___600.rua.gz (17707 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 ] 129254 bytes

Matrix Statistics

Size	Type
822 x 822, 4172 entries	real unsymmetric
Nonzeros
total diagonal below diagonal above diagonal A-A' 4172 2 1512 2658 8312
Column Data	Row Data
Average nonzeros per column : 5.1 Standard deviation : 3.7 index nonzeros longest 739 21 shortest 1 1	Average nonzeros per row : 5.1 Standard deviation : 12 index nonzeros longest 1 302 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 2e+02 2e+02 upper bandwidth 0 820 2.5e+02 2.5e+02 Nonsymmetric skyline storage 373879
Heaviest diagonals
offset from main -181 -88 -413 -229 -465 -411 320 -327 -329 -178 nonzeros 29 28 26 23 19 18 18 17 16 16 accumulated percent 0.70 1.37 1.99 2.54 3.00 3.43 3.86 4.27 4.65 5.03 Top 10 out of 1189 nonvoid diagonals.
Conditioning
Frobenius norm 1.1e+03 condition number (est.) 5.1e+06 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: ]