Matrix CAN 161

CAN 161: Structures problems in aircraft design

from set CANNES, from the Harwell-Boeing Collection

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Compressed MatrixMarket format file: can__161.mtx.gz (1568 bytes)

Compressed Harwell-Boeing format file: can__161.psa.gz (1345 bytes)

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Visualizations

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Structure Plot

Size Type

161 x 161, 769 entries pattern symmetric indefinite

Nonzeros

total diagonal below diagonal above diagonal A-A'
1377 161 608 608 0

Column Data Row Data

Average nonzeros per column : 8.6
Standard deviation : 1.2
index nonzeros
longest 161 17
shortest 49 6
Average nonzeros per row : 8.6
Standard deviation : 1.2
index nonzeros
longest 161 17
shortest 49 6

Bandwidths Profile Storage

lower 80 upper 80
average |i-j| 14 std.dev. 16

min max ave. std.dev.
lower bandwidth 1 80 22 16
upper bandwidth 1 80 22 16
Symmetric skyline storage requirement:3539

Heaviest diagonals

offset from main 0 -1 1 -15 15 -16 16 -17 17 -64
nonzeros 161 159 159 131 131 129 129 120 120 16
accumulated percent 11.69 23.24 34.79 44.30 53.81 63.18 72.55 81.26 89.98 91.14

Top 10 out of 47 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: ]