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

from set PLATZ, from the Harwell-Boeing Collection

[Download] [Visualizations] [Matrix Statistics] [Set Information]


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.


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Visualizations

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Structure Plot City Plot
structure plot city plot
3D Interactive City Plot

[ VRML Version 2, gzipped ] 224296 bytes


Matrix Statistics

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Size Type
362 x 362, 880 entries real skew symmetric
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
1760 0 880 880 1760
Column Data Row Data
Average nonzeros per column : 4.9
Standard deviation : 1.2

indexnonzeros
longest134 6
shortest84 1

Average nonzeros per row : 4.9
Standard deviation : 1.2

indexnonzeros
longest134 6
shortest84 1

Bandwidths Profile Storage
lower249 upper249
average |i-j|1.5e+02 std.dev.54
minmaxave.std.dev.
lower bandwidth2 249 1.4e+02 79
upper bandwidth2 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
nonzeros90 90 66 66 58 58 55 55 51 51
accumulated percent 5.1110.2313.9817.7321.0224.3227.4430.5733.4736.36

Top 10 out of 74 nonvoid diagonals.
Conditioning
Frobenius norm8.2 condition number (est.)1.7e+06
2-norm (est.)0.88 diagonal dominanceno


Set Information

Set PLATZ
Source: John Lewis, Boeing Computer Services, Seattle, Washington
Discipline:Oceanic modeling
Accession:Summer 1975


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