LOCK 700: Structural engineering matrices (unassembled)
Porch ocean mining

from set LOCKHEED, from the Harwell-Boeing Collection

Note: The previously available version of this matrix in Matrix Market format refects an assembly which differs from what the contributor intended and has been withdrawn. Please discard it if you have taken a copy. The Harwell-Boeing file remains, but requires proper interpretation.

Download as

Matrix Market format not available.
Compressed Harwell-Boeing format file: lock_700.pse.gz (4345 bytes)

Visualizations

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

Structure Plot

Matrix Statistics

Size	Type
700 x 700, 3983 entries	pattern symmetric positive definite
Nonzeros
total diagonal below diagonal above diagonal A-A' 22175 691 10742 10742 0
Column Data	Row Data
Average nonzeros per column : 32 Standard deviation : 12 index nonzeros longest 109 60 shortest 487 0	Average nonzeros per row : 32 Standard deviation : 12 index nonzeros longest 109 60 shortest 487 0
Bandwidths	Profile Storage
lower 682 upper 682 average |i-j| 68 std.dev. 1.4e+02	min max ave. std.dev. lower bandwidth 0 681 1.2e+02 1.8e+02 upper bandwidth 0 681 1.2e+02 1.8e+02 Symmetric skyline storage requirement:81415
Heaviest diagonals
offset from main 0 -1 1 -2 2 -3 3 -4 4 -5 nonzeros 691 634 634 579 579 525 525 482 482 440 accumulated percent 3.12 5.98 8.83 11.45 14.06 16.42 18.79 20.97 23.14 25.12 Top 10 out of 711 nonvoid diagonals.
Conditioning
Pattern matrix. No conditioning information.

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Last change in this page: Wed Sep 22 13:33:43 US/Eastern 2004 [Comments: ]