Matrix CAN 24

CAN 24: Structures problems in aircraft design

from set CANNES, from the Harwell-Boeing Collection

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Compressed MatrixMarket format file: can___24.mtx.gz (282 bytes)

Compressed Harwell-Boeing format file: can___24.psa.gz (308 bytes)

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Visualizations

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Structure Plot

Size Type

24 x 24, 92 entries pattern symmetric indefinite

Nonzeros

total diagonal below diagonal above diagonal A-A'
160 24 68 68 0

Column Data Row Data

Average nonzeros per column : 6.7
Standard deviation : 1.8
index nonzeros
longest 1 9
shortest 9 4
Average nonzeros per row : 6.7
Standard deviation : 1.8
index nonzeros
longest 1 9
shortest 9 4

Bandwidths Profile Storage

lower 22 upper 22
average |i-j| 7.3 std.dev. 6

min max ave. std.dev.
lower bandwidth 1 22 11 7.1
upper bandwidth 1 22 11 7.1
Symmetric skyline storage requirement:262

Heaviest diagonals

offset from main 0 -1 1 -12 12 -8 8 -11 -10 -9
nonzeros 24 9 9 6 6 5 5 4 4 4
accumulated percent 15.00 20.62 26.25 30.00 33.75 36.88 40.00 42.50 45.00 47.50

Top 10 out of 41 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: ]