SHL 400: Original Harwell sparse matrix test collection
Simplex method basis matrix

from set SMTAPE, from the Harwell-Boeing Collection

Download as

Compressed MatrixMarket format file: shl__400.mtx.gz (7768 bytes)
Compressed Harwell-Boeing format file: shl__400.rua.gz (6247 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 ] 207433 bytes

Matrix Statistics

Size	Type
663 x 663, 1712 entries	real unsymmetric
Nonzeros
total diagonal below diagonal above diagonal A-A' 1712 3 246 1463 3418
Column Data	Row Data
Average nonzeros per column : 2.6 Standard deviation : 0.88 index nonzeros longest 5 4 shortest 1 1	Average nonzeros per row : 2.6 Standard deviation : 17 index nonzeros longest 1 426 shortest 4 1
Bandwidths	Profile Storage
lower 539 upper 663 average |i-j| 2.4e+02 std.dev. 1.6e+02	min max ave. std.dev. lower bandwidth 0 538 1.1e+02 2e+02 upper bandwidth 0 662 2.9e+02 2.1e+02 Nonsymmetric skyline storage 263020
Heaviest diagonals
offset from main -534 188 187 185 189 182 190 183 126 140 nonzeros 110 39 36 30 29 28 28 27 26 24 accumulated percent 6.43 8.70 10.81 12.56 14.25 15.89 17.52 19.10 20.62 22.02 Top 10 out of 641 nonvoid diagonals.
Conditioning
Frobenius norm 9.3e+03 condition number (est.) 1.9e+07 2-norm (est.) 9.3e+03 diagonal dominance no

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