The Matrix Market

Home Search Browse Resources

BCSSTM01: BCS Structural Engineering Matrices (eigenvalue matrices)
Small test problem

from set BCSSTRUC1, from the Harwell-Boeing Collection

[Download] [Visualizations] [Matrix Statistics] [Set Information]

From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix M; matrix K is BCSSTK01 from BCSSTRUC1 set.

Download as

Help: My browser can't read the compressed data files. What now?


Click on image to get an enlarged version. Click on label to get an explanation.

Structure Plot City Plot
structure plot city plot
3D Interactive City Plot

[ VRML Version 2, gzipped ] 6453 bytes

Matrix Statistics

Click on label to get an explanation.

Size Type
48 x 48, 48 entries real symmetric positive semi-definite
totaldiagonalbelow diagonalabove diagonalA-A'
24 24 0 0 0
Column Data Row Data
Average nonzeros per column : 0.5
Standard deviation : 0.51

longest1 1
shortest4 0

Average nonzeros per row : 0.5
Standard deviation : 0.51

longest1 1
shortest4 0

Bandwidths Profile Storage
lower1 upper1
average |i-j|0
lower bandwidth1 49 14 16
upper bandwidth1 49 14 16

Symmetric skyline storage requirement:672

Heaviest diagonals
offset from main0
accumulated percent100.00

Top 1 out of 1 nonvoid diagonals.
Frobenius norm7.7e+02 condition number (est.)Inf
2-norm (est.)2e+02 diagonal dominanceno

Set Information

Source: John Lewis, Boeing Computer Services, Seattle, Washington, USA
Discipline:Dynamic analyses in structural engineering
Accession:Summer 1982

The Matrix Market is a service of the Mathematical and Computational Sciences Division / Information Technology Laboratory / National Institute of Standards and Technology.

[ Home ] [ Search ] [ Browse ] [ Resources ]

Last change in this page: Wed Sep 22 13:33:24 US/Eastern 2004 [Comments: ]