STR 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: str__400.mtx.gz (18973 bytes)
Compressed Harwell-Boeing format file: str__400.rua.gz (12760 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 ] 394332 bytes

Matrix Statistics

Size	Type
363 x 363, 3157 entries	real unsymmetric
Nonzeros
total diagonal below diagonal above diagonal A-A' 3157 2 1500 1655 6248
Column Data	Row Data
Average nonzeros per column : 8.7 Standard deviation : 9.5 index nonzeros longest 239 34 shortest 1 1	Average nonzeros per row : 8.7 Standard deviation : 8.1 index nonzeros longest 288 33 shortest 3 1
Bandwidths	Profile Storage
lower 348 upper 360 average |i-j| 1.6e+02 std.dev. 91	min max ave. std.dev. lower bandwidth 0 347 1e+02 1e+02 upper bandwidth 0 359 74 1.1e+02 Nonsymmetric skyline storage 63650
Heaviest diagonals
offset from main 156 -33 -51 -35 118 188 -206 150 154 173 nonzeros 26 21 20 18 18 18 17 16 16 16 accumulated percent 0.82 1.49 2.12 2.69 3.26 3.83 4.37 4.88 5.38 5.89 Top 10 out of 607 nonvoid diagonals.
Conditioning
Frobenius norm 40 condition number (est.) 3.7e+04 2-norm (est.) 15 diagonal dominance no

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