Matrix CAN 229

CAN 229: Structures problems in aircraft design

from set CANNES, from the Harwell-Boeing Collection

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Compressed MatrixMarket format file: can__229.mtx.gz (2115 bytes)

Compressed Harwell-Boeing format file: can__229.psa.gz (1928 bytes)

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Visualizations

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Structure Plot

Size Type

229 x 229, 1003 entries pattern symmetric indefinite

Nonzeros

total diagonal below diagonal above diagonal A-A'
1777 229 774 774 0

Column Data Row Data

Average nonzeros per column : 7.8
Standard deviation : 2.1
index nonzeros
longest 229 13
shortest 145 3
Average nonzeros per row : 7.8
Standard deviation : 2.1
index nonzeros
longest 229 13
shortest 145 3

Bandwidths Profile Storage

lower 173 upper 173
average |i-j| 24 std.dev. 27

min max ave. std.dev.
lower bandwidth 1 173 40 35
upper bandwidth 1 173 40 35
Symmetric skyline storage requirement:9157

Heaviest diagonals

offset from main 0 -1 1 -24 24 -23 23 -25 25 -72
nonzeros 229 196 196 128 128 124 124 115 115 24
accumulated percent 12.89 23.92 34.95 42.15 49.35 56.33 63.31 69.78 76.25 77.60

Top 10 out of 109 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: ]