Matrix CAN 268

CAN 268: Structures problems in aircraft design

from set CANNES, from the Harwell-Boeing Collection

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Compressed MatrixMarket format file: can__268.mtx.gz (3755 bytes)

Compressed Harwell-Boeing format file: can__268.psa.gz (2867 bytes)

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Visualizations

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Structure Plot

Size Type

268 x 268, 1675 entries pattern symmetric indefinite

Nonzeros

total diagonal below diagonal above diagonal A-A'
3082 268 1407 1407 0

Column Data Row Data

Average nonzeros per column : 12
Standard deviation : 5.8
index nonzeros
longest 28 37
shortest 237 4
Average nonzeros per row : 12
Standard deviation : 5.8
index nonzeros
longest 28 37
shortest 237 4

Bandwidths Profile Storage

lower 264 upper 264
average |i-j| 37 std.dev. 42

min max ave. std.dev.
lower bandwidth 1 264 69 56
upper bandwidth 1 264 69 56
Symmetric skyline storage requirement:18540

Heaviest diagonals

offset from main 0 -1 1 -2 2 -3 3 -12 12 -11
nonzeros 268 134 134 97 97 93 93 36 36 35
accumulated percent 8.70 13.04 17.39 20.54 23.69 26.70 29.72 30.89 32.06 33.19

Top 10 out of 313 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: ]