ASH608: Original Harwell sparse matrix test collection
England survey

from set SMTAPE, from the Harwell-Boeing Collection

Due to Ashkenazi, 1974.

Download as

Compressed MatrixMarket format file: ash608.mtx.gz (2671 bytes)
Compressed Harwell-Boeing format file: ash608.pra.gz (2603 bytes)

Visualizations

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

Structure Plot

Matrix Statistics

Size	Type
608 x 188, 1216 entries	pattern unsymmetric
Nonzeros
total diagonal below diagonal above diagonal A-A' 1216 2 1212 2 N/A
Column Data	Row Data
Average nonzeros per column : 6.5 Standard deviation : 1.8 index nonzeros longest 114 12 shortest 188 2	Average nonzeros per row : 2 Standard deviation : 0 index nonzeros longest 1 2 shortest 1 2
Bandwidths	Profile Storage
lower 422 upper 3 average |i-j| 2.1e+02 std.dev. 1.2e+02	min max ave. std.dev. lower bandwidth 0 421 2.2e+02 1.2e+02 upper bandwidth 0 2 0.0049 0.091 Nonsymmetric skyline storage N/A
Heaviest diagonals
offset from main -378 -377 -40 -328 -217 -194 -11 -403 -393 -346 nonzeros 10 8 8 7 7 7 7 6 6 6 accumulated percent 0.82 1.48 2.14 2.71 3.29 3.87 4.44 4.93 5.43 5.92 Top 10 out of 424 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: ]