Matrix: Newman/celegansneural

Description: Neural network of the nematode C. Elegans

Newman/celegansneural graph Newman/celegansneural graph
(bipartite graph drawing) (graph drawing of A+A')

scc of Newman/celegansneural

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    Matrix properties
    number of rows297
    number of columns297
    # strongly connected comp.57
    explicit zero entries0
    nonzero pattern symmetry 17%
    numeric value symmetry 5%
    Cholesky candidate?no
    positive definite?no

    authorJ. White, E. Southgate, J. Thompson, S. Brenner
    editorD. Watts, S. Strogatz
    kinddirected weighted graph
    2D/3D problem?no

    Additional fieldssize and type
    nodenamefull 297-by-3


    Network collection from M. Newman                                                                    
    Neural network of the nematode C. Elegans                                  
    Compiled by Duncan Watts and Steven Strogatz from original experimental    
    data by White et al.                                                       
    The graph celegansneural describes a weighted, directed network            
    representing the neural network of C. Elegans.  The data were taken from   
    the web site of Prof. Duncan Watts at Columbia University,              The nodes in the original data were 
    not consecutively numbered, so they have been renumbered to be consecutive.
    The original node numbers from Watts' data file are retained as the labels 
    of the nodes.  Edge weights are the weights given by Watts.                
    These data can be cited as:                                                
      J. G. White, E. Southgate, J. N. Thompson, and S. Brenner, "The structure
      of the nervous system of the nematode C. Elegans", Phil. Trans. R. Soc.  
      London 314, 1-340 (1986).                                                
      D. J. Watts and S. H. Strogatz, "Collective dynamics of `small-world     
      networks", Nature 393, 440-442 (1998).                                   

    SVD-based statistics:
    null space dimension49
    full numerical rank?no
    singular value gap1.59671e+12

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

    Newman/celegansneural 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.