Normal matrix from least squares adjustment of survey data. Due to Ashkenazi, 1974.
Click on image to get an enlarged version. Click on label to get an explanation.
Structure Plot 

Size  Type  

85 x 85, 304 entries  pattern symmetric indefinite  
Nonzeros  


Column Data  Row Data  
Average nonzeros per column : 6.2 Standard deviation : 1.4

Average nonzeros per row : 6.2 Standard deviation : 1.4


Bandwidths  Profile Storage  

Symmetric skyline storage requirement:1153 

Heaviest diagonals  
Top 10 out of 67 nonvoid diagonals. 

Conditioning  
Pattern matrix. No conditioning information. 
Set SMTAPE  

Source:  Harwell Laboratory, England. 
Discipline:  Variety of disciplines 
Accession:  Summer 1978 
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Last change in this page: Wed Sep 22 13:33:52 US/Eastern 2004 [Comments: ]