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

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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

Set Information
Set CIRPHYS
Source:
J P Whelan, Circuit Physics and Applications Division, Philips Research Laboratories, Redhill, Surrey, England.
Discipline: Circuit physics
Accession: December 1978

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