Matrix: Newman/dolphins

Description: social network of dolphins, Doubtful Sound, New Zealand

Newman/dolphins graph
(undirected graph drawing)


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  • download as a MATLAB mat-file, file size: 2 KB. Use UFget(2396) or UFget('Newman/dolphins') in MATLAB.
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    Matrix properties
    number of rows62
    number of columns62
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?no
    positive definite?no

    authorD. Lusseau
    editorM. Newman
    kindundirected graph
    2D/3D problem?no

    Additional fieldssize and type
    nodenamefull 62-by-11


    Network collection from M. Newman                                                                    
    The graph dolphins contains an undirected social network of frequent       
    associations between 62 dolphins in a community living off Doubtful Sound, 
    New Zealand, as compiled by Lusseau et al. (2003).  Please cite            
      D. Lusseau, K. Schneider, O. J. Boisseau, P. Haase, E. Slooten, and      
      S. M. Dawson, The bottlenose dolphin community of Doubtful Sound features
      a large proportion of long-lasting associations, Behavioral Ecology and  
      Sociobiology 54, 396-405 (2003).                                         
    Additional information on the network can be found in                      
      D. Lusseau, The emergent properties of a dolphin social network,         
      Proc. R. Soc. London B (suppl.) 270, S186-S188 (2003).                   
      D. Lusseau, Evidence for social role in a dolphin social network,        
      Preprint q-bio/0607048 (           

    SVD-based statistics:
    null space dimension2
    full numerical rank?no
    singular value gap2.78247e+13

    singular values (MAT file):click here
    SVD method used:s = svd (full (A)) ;

    Newman/dolphins svd

    For a description of the statistics displayed above, click here.

    Maintained by Tim Davis, last updated 12-Mar-2014.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.