BCSSTK03: BCS Structural Engineering Matrices (eigenvalue matrices)
Small test structure

from set BCSSTRUC1, from the Harwell-Boeing Collection

From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix K; matrix M is BCSSTM03 from BCSSTRUC1 set.

Download as

Compressed MatrixMarket format file: bcsstk03.mtx.gz (2688 bytes)
Compressed Harwell-Boeing format file: bcsstk03.rsa.gz (2534 bytes)

Visualizations

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

Structure Plot	City Plot
	3D Interactive City Plot
	[ VRML Version 2, gzipped ] 93919 bytes

Matrix Statistics

Size	Type
112 x 112, 376 entries	real symmetric positive definite
Nonzeros
total diagonal below diagonal above diagonal A-A' 640 112 264 264 0
Column Data	Row Data
Average nonzeros per column : 5.7 Standard deviation : 0.59 index nonzeros longest 5 6 shortest 1 4	Average nonzeros per row : 5.7 Standard deviation : 0.59 index nonzeros longest 5 6 shortest 1 4
Bandwidths	Profile Storage
lower 8 upper 8 average |i-j| 3 std.dev. 2.1	min max ave. std.dev. lower bandwidth 1 8 5.9 1.4 upper bandwidth 1 8 5.9 1.4 Symmetric skyline storage requirement:656
Heaviest diagonals
offset from main 0 -4 4 -3 -1 1 3 -7 -5 5 nonzeros 112 108 108 51 51 51 51 27 27 27 accumulated percent 17.50 34.38 51.25 59.22 67.19 75.16 83.12 87.34 91.56 95.78 Top 10 out of 11 nonvoid diagonals.
Conditioning
Frobenius norm 3.5e+11 condition number (est.) 9.5e+06 2-norm (est.) 2e+11 diagonal dominance no

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

Last change in this page: Wed Sep 22 13:33:23 US/Eastern 2004 [Comments: ]