494 BUS: Power systems admittance matrices
Power system networks

from set PSADMIT, from the Harwell-Boeing Collection

Download as

Compressed MatrixMarket format file: 494_bus.mtx.gz (9237 bytes)
Compressed Harwell-Boeing format file: 494_bus.rsa.gz (8467 bytes)

Visualizations

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Structure Plot	City Plot
	3D Interactive City Plot
	[ VRML Version 2, gzipped ] 276025 bytes

Matrix Statistics

Size	Type
494 x 494, 1080 entries	real symmetric indefinite symmetric positive definite
Nonzeros
total diagonal below diagonal above diagonal A-A' 1666 494 586 586 0
Column Data	Row Data
Average nonzeros per column : 3.4 Standard deviation : 1.4 index nonzeros longest 457 10 shortest 2 2	Average nonzeros per row : 3.4 Standard deviation : 1.4 index nonzeros longest 457 10 shortest 2 2
Bandwidths	Profile Storage
lower 429 upper 429 average |i-j| 69 std.dev. 1.1e+02	min max ave. std.dev. lower bandwidth 1 429 84 1.2e+02 upper bandwidth 1 429 84 1.2e+02 Symmetric skyline storage requirement:41469
Heaviest diagonals
offset from main 0 -1 1 -2 2 -3 3 -4 4 -5 nonzeros 494 95 95 44 44 34 34 29 29 16 accumulated percent 29.65 35.35 41.06 43.70 46.34 48.38 50.42 52.16 53.90 54.86 Top 10 out of 465 nonvoid diagonals.
Conditioning
Frobenius norm 5.8e+04 condition number (est.) 3.9e+06 2-norm (est.) 3e+04 diagonal dominance no

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Last change in this page: Wed Sep 22 13:33:49 US/Eastern 2004 [Comments: ]