JPWH 991: Circuit physics modeling
Computer random simulation of a circuit physics model

from set CIRPHYS, from the Harwell-Boeing Collection

Was using MA28 and was concerned about the amount of fill-in. Example in test set is of order 991 but is indicative of structure of larger matrices (to order 3000) from the same modeling exercise.
Unsymmetric but with variable band characteristics.

Download as

Compressed MatrixMarket format file: jpwh_991.mtx.gz (21387 bytes)
Compressed Harwell-Boeing format file: jpwh_991.rua.gz (13766 bytes)

Visualizations

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

Structure Plot	City Plot
Spectral Portrait	3D Interactive City Plot
	[ VRML Version 2, gzipped ] 139880 bytes

Matrix Statistics

Size	Type
991 x 991, 6027 entries	real unsymmetric
Nonzeros
total diagonal below diagonal above diagonal A-A' 6027 991 2538 2498 640
Column Data	Row Data
Average nonzeros per column : 6.1 Standard deviation : 2.1 index nonzeros longest 403 16 shortest 6 1	Average nonzeros per row : 6.1 Standard deviation : 2.6 index nonzeros longest 403 16 shortest 1 1
Bandwidths	Profile Storage
lower 198 upper 198 average |i-j| 51 std.dev. 38	min max ave. std.dev. lower bandwidth 1 198 79 40 upper bandwidth 1 198 78 39 Nonsymmetric skyline storage 154402
Heaviest diagonals
offset from main 0 -48 -64 59 48 -59 -57 -56 45 56 nonzeros 991 38 37 36 35 34 34 34 34 34 accumulated percent 16.44 17.07 17.69 18.28 18.87 19.43 19.99 20.56 21.12 21.69 Top 10 out of 317 nonvoid diagonals.
Conditioning
Frobenius norm 1.9e+02 condition number (est.) 7.3e+02 2-norm (est.) 16 diagonal dominance weak

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Last change in this page: Wed Sep 22 13:33:32 US/Eastern 2004 [Comments: ]