ASH219: Original Harwell sparse matrix test collection
Survey of Holland

from set SMTAPE, from the Harwell-Boeing Collection

Due to Ashkenazi, 1974.

Download as

Compressed MatrixMarket format file: ash219.mtx.gz (1015 bytes)
Compressed Harwell-Boeing format file: ash219.pra.gz (1048 bytes)

Visualizations

Click on image to get an enlarged version. Click on label to get an explanation.

Structure Plot

Matrix Statistics

Size	Type
219 x 85, 438 entries	pattern unsymmetric
Nonzeros
total diagonal below diagonal above diagonal A-A' 438 4 420 14 N/A
Column Data	Row Data
Average nonzeros per column : 5.2 Standard deviation : 1.4 index nonzeros longest 39 9 shortest 63 2	Average nonzeros per row : 2 Standard deviation : 0 index nonzeros longest 1 2 shortest 1 2
Bandwidths	Profile Storage
lower 136 upper 27 average |i-j| 69 std.dev. 42	min max ave. std.dev. lower bandwidth 0 135 74 42 upper bandwidth 0 26 0.3 2 Nonsymmetric skyline storage N/A
Heaviest diagonals
offset from main -132 -134 -133 -135 -44 -131 -92 -50 -84 -39 nonzeros 14 11 11 9 8 7 7 7 6 6 accumulated percent 3.20 5.71 8.22 10.27 12.10 13.70 15.30 16.89 18.26 19.63 Top 10 out of 144 nonvoid diagonals.
Conditioning
Pattern matrix. No conditioning information.

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