Matrix CAN 838

CAN 838: Structures problems in aircraft design

from set CANNES, from the Harwell-Boeing Collection

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Compressed MatrixMarket format file: can__838.mtx.gz (12221 bytes)

Compressed Harwell-Boeing format file: can__838.psa.gz (9711 bytes)

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Visualizations

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Structure Plot

Size Type

838 x 838, 5424 entries pattern symmetric indefinite

Nonzeros

total diagonal below diagonal above diagonal A-A'
10010 838 4586 4586 0

Column Data Row Data

Average nonzeros per column : 12
Standard deviation : 6.2
index nonzeros
longest 64 32
shortest 128 6
Average nonzeros per row : 12
Standard deviation : 6.2
index nonzeros
longest 64 32
shortest 128 6

Bandwidths Profile Storage

lower 838 upper 838
average |i-j| 1.6e+02 std.dev. 1.6e+02

min max ave. std.dev.
lower bandwidth 1 838 2.5e+02 1.7e+02
upper bandwidth 1 838 2.5e+02 1.7e+02
Symmetric skyline storage requirement:208038

Heaviest diagonals

offset from main 0 -1 1 -2 2 -403 403 -404 404 -402
nonzeros 838 487 487 162 162 117 117 111 111 108
accumulated percent 8.37 13.24 18.10 19.72 21.34 22.51 23.68 24.79 25.89 26.97

Top 10 out of 699 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: ]