Matrix properties
number of rows	297
number of columns	297
nonzeros	2,345
# strongly connected comp.	57
explicit zero entries	0
nonzero pattern symmetry	17%
numeric value symmetry	5%
type	integer
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	J. White, E. Southgate, J. Thompson, S. Brenner
editor	D. Watts, S. Strogatz
date	1998
kind	directed weighted graph
2D/3D problem?	no

Additional fields	size and type
nodename	full 297-by-3

Notes:

Network collection from M. Newman                                          
http://www-personal.umich.edu/~mejn/netdata/                               
                                                                           
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,                 
http://cdg.columbia.edu/cdg/datasets.  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:
norm(A)	183.876
min(svd(A))	0
cond(A)	Inf
rank(A)	248
null space dimension	49
full numerical rank?	no
singular value gap	1.59671e+12

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

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.