STR 200: Original Harwell sparse matrix test collection
Simplex method basis matrix

from set SMTAPE, from the Harwell-Boeing Collection

Download as

Compressed MatrixMarket format file: str__200.mtx.gz (18462 bytes)
Compressed Harwell-Boeing format file: str__200.rua.gz (12414 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 ] 382218 bytes

Matrix Statistics

Size	Type
363 x 363, 3068 entries	real unsymmetric
Nonzeros
total diagonal below diagonal above diagonal A-A' 3068 2 1329 1737 6098
Column Data	Row Data
Average nonzeros per column : 8.5 Standard deviation : 9.2 index nonzeros longest 129 26 shortest 1 1	Average nonzeros per row : 8.5 Standard deviation : 8 index nonzeros longest 14 30 shortest 3 1
Bandwidths	Profile Storage
lower 308 upper 360 average |i-j| 1.6e+02 std.dev. 90	min max ave. std.dev. lower bandwidth 0 307 93 95 upper bandwidth 0 359 74 1.1e+02 Nonsymmetric skyline storage 60362
Heaviest diagonals
offset from main -33 156 193 -51 118 -35 150 188 225 316 nonzeros 26 26 21 19 19 18 18 18 17 17 accumulated percent 0.85 1.69 2.38 3.00 3.62 4.20 4.79 5.38 5.93 6.49 Top 10 out of 581 nonvoid diagonals.
Conditioning
Frobenius norm 37 condition number (est.) 1.3e+05 2-norm (est.) 12 diagonal dominance no

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