YOUNG1C: Acoustic scattering

from set ACOUST, from the Harwell-Boeing Collection

Warning: This matrix is identified as symmetric since it was originally specified as being so in the header of its Harwell-Boeing file representation. Unfortunately, the data within the file itself is not symmetric. This inconsistency has been propagated into the Matrix Market format file header also. This has lead to some confusion in the use of this matrix: Should the header be respected and the data symmetrized, or should the header be ignored and the matrix treated as nonsymmetric? The matrix statistics we present assume the former, which is also what is done by Matlab.

Download as

Compressed MatrixMarket format file: young1c.mtx.gz (13505 bytes)
Compressed Harwell-Boeing format file: young1c.csa.gz (9584 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 ] 177394 bytes

Matrix Statistics

Size	Type
841 x 841, 4089 entries	complex symmetric indefinite
Nonzeros
total diagonal below diagonal above diagonal A-A' A-A* 4089 841 1624 1624 0 190
Column Data	Row Data
Average nonzeros per column : 4.9 Standard deviation : 0.36 index nonzeros longest 31 5 shortest 1 3	Average nonzeros per row : 4.9 Standard deviation : 0.36 index nonzeros longest 31 5 shortest 1 3
Bandwidths	Profile Storage
lower 30 upper 30 average |i-j| 12 std.dev. 14	min max ave. std.dev. lower bandwidth 1 30 29 5.1 upper bandwidth 1 30 29 5.1 Symmetric skyline storage requirement:24417
Heaviest diagonals
offset from main 0 -29 -1 1 29 nonzeros 841 812 812 812 812 accumulated percent 20.57 40.43 60.28 80.14 100.00 Top 5 out of 5 nonvoid diagonals.
Conditioning
Frobenius norm 8.5e+03 condition number (est.) 2.9e+02 2-norm (est.) 7.2e+02 diagonal dominance no

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

Last change in this page: Wed Sep 22 13:33:20 US/Eastern 2004 [Comments: ]