PLSKZ362: Platzman's oceanographic models
skew-symmetric North Atlantic submodel

from set PLATZ, from the Harwell-Boeing Collection

A finite-difference model for the shallow wave equations for the Atlantic Ocean. This is a one ocean submodel of PLSK1919. Represents a purely imaginary skew-symmetric matrix. Matrix PLAT362 is its (negative) square.

Download as

Compressed MatrixMarket format file: plskz362.mtx.gz (9537 bytes)
Compressed Harwell-Boeing format file: plskz362.rza.gz (10550 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 ] 224296 bytes

Matrix Statistics

Size	Type
362 x 362, 880 entries	real skew symmetric
Nonzeros
total diagonal below diagonal above diagonal A-A' 1760 0 880 880 1760
Column Data	Row Data
Average nonzeros per column : 4.9 Standard deviation : 1.2 index nonzeros longest 134 6 shortest 84 1	Average nonzeros per row : 4.9 Standard deviation : 1.2 index nonzeros longest 134 6 shortest 84 1
Bandwidths	Profile Storage
lower 249 upper 249 average |i-j| 1.5e+02 std.dev. 54	min max ave. std.dev. lower bandwidth 2 249 1.4e+02 79 upper bandwidth 2 249 1.4e+02 79 Symmetric skyline storage requirement:51967
Heaviest diagonals
offset from main -121 121 -120 120 -111 111 -112 112 -122 122 nonzeros 90 90 66 66 58 58 55 55 51 51 accumulated percent 5.11 10.23 13.98 17.73 21.02 24.32 27.44 30.57 33.47 36.36 Top 10 out of 74 nonvoid diagonals.
Conditioning
Frobenius norm 8.2 condition number (est.) 1.7e+06 2-norm (est.) 0.88 diagonal dominance no

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Last change in this page: Wed Sep 22 13:33:48 US/Eastern 2004 [Comments: ]