Matrix CAN 445

CAN 445: Structures problems in aircraft design

from set CANNES, from the Harwell-Boeing Collection

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Compressed MatrixMarket format file: can__445.mtx.gz (4436 bytes)

Compressed Harwell-Boeing format file: can__445.psa.gz (3793 bytes)

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Visualizations

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Structure Plot

Size Type

445 x 445, 2127 entries pattern symmetric indefinite

Nonzeros

total diagonal below diagonal above diagonal A-A'
3809 445 1682 1682 0

Column Data Row Data

Average nonzeros per column : 8.6
Standard deviation : 1.3
index nonzeros
longest 5 13
shortest 187 4
Average nonzeros per row : 8.6
Standard deviation : 1.3
index nonzeros
longest 5 13
shortest 187 4

Bandwidths Profile Storage

lower 404 upper 404
average |i-j| 29 std.dev. 56

min max ave. std.dev.
lower bandwidth 1 404 51 77
upper bandwidth 1 404 51 77
Symmetric skyline storage requirement:22766

Heaviest diagonals

offset from main 0 -1 1 -15 15 -16 16 -17 17 -6
nonzeros 445 402 402 146 146 144 144 140 140 109
accumulated percent 11.68 22.24 32.79 36.62 40.46 44.24 48.02 51.69 55.37 58.23

Top 10 out of 273 nonvoid diagonals.

Conditioning

Pattern matrix. No conditioning information.

Set Information

Set CANNES
Source:	Lucien Marro, Programmation Scientifique, Aerospatiale Cannes, France.
Discipline:	Finite-element structures problems in aircraft design.
Accession:	June 3, 1981

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Last change in this page: Wed Sep 22 13:33:29 US/Eastern 2004 [Comments: ]