BP 1400: 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__1400.mtx.gz (28192 bytes)
Compressed Harwell-Boeing format file: bp__1400.rua.gz (20319 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 ] 148511 bytes

Matrix Statistics

Size	Type
822 x 822, 4790 entries	real unsymmetric
Nonzeros
total diagonal below diagonal above diagonal A-A' 4790 5 1904 2881 9518
Column Data	Row Data
Average nonzeros per column : 5.8 Standard deviation : 4.2 index nonzeros longest 739 21 shortest 1 1	Average nonzeros per row : 5.8 Standard deviation : 12 index nonzeros longest 1 311 shortest 2 1
Bandwidths	Profile Storage
lower 805 upper 821 average |i-j| 2.8e+02 std.dev. 1.9e+02	min max ave. std.dev. lower bandwidth 0 804 2.3e+02 2.1e+02 upper bandwidth 0 820 2.5e+02 2.5e+02 Nonsymmetric skyline storage 391792
Heaviest diagonals
offset from main -229 -181 -88 -329 -327 320 100 -413 -411 184 nonzeros 24 22 21 18 17 17 16 15 15 14 accumulated percent 0.50 0.96 1.40 1.77 2.13 2.48 2.82 3.13 3.44 3.74 Top 10 out of 1289 nonvoid diagonals.
Conditioning
Frobenius norm 1.1e+03 condition number (est.) 5.1e+07 2-norm (est.) 4e+02 diagonal dominance no

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Last change in this page: Wed Sep 22 13:33:53 US/Eastern 2004 [Comments: ]