• UF Sparse Matrix Collection
  • Matrix group: Pajek
  • Click here for a description of the Pajek group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups

  • Matrix: Pajek/GD01_A
  • Description: Pajek network: Graph Drawing contest 2001
  • download as a MATLAB mat-file, file size: 8 KB. Use UFget(1478) or UFget('Pajek/GD01_A') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Pajek/GD01_A

    scc of Pajek/GD01_A

    Pajek/GD01_A graph

    Pajek/GD01_A graph

    Matrix properties
    number of rows953
    number of columns953
    nonzeros645
    structural full rank?no
    structural rank158
    # of blocks from dmperm61
    # strongly connected comp.945
    explicit zero entries0
    nonzero pattern symmetry 2%
    numeric value symmetry 2%
    typeinteger
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorGraph Drawing Contest
    editorV. Batagelj
    date2001
    kinddirected multigraph
    2D/3D problem?no

    Additional fieldssize and type
    nodenamefull 953-by-38
    coordfull 953-by-3

    Notes:

    ------------------------------------------------------------------------------
Pajek network converted to sparse adjacency matrix for inclusion in UF sparse 
matrix collection, Tim Davis.  For Pajek datasets, See V. Batagelj & A. Mrvar,
http://vlado.fmf.uni-lj.si/pub/networks/data/.                                
------------------------------------------------------------------------------

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))2,903 2,984
    Cholesky flop count4.1e+04 4.3e+04
    nnz(L+U), no partial pivoting4,853 5,015
    nnz(V) for QR, upper bound nnz(L) for LU2,692 2,561
    nnz(R) for QR, upper bound nnz(U) for LU2,828 2,841

    Maintained by Tim Davis, last updated 04-May-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.