Buss/12month1 graph

Matrix: Buss/12month1

Description: 12 months, 12,646 users from digg.com. Steven Buss

  • UF Sparse Matrix Collection
  • Matrix group: Buss
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  • download as a MATLAB mat-file, file size: 36 MB. Use UFget(2263) or UFget('Buss/12month1') in MATLAB.
  • download in Matrix Market format, file size: 61 MB.
  • download in Rutherford/Boeing format, file size: 40 MB.

    Buss/12month1

    scc of Buss/12month1

    Matrix properties
    number of rows12,471
    number of columns872,622
    nonzeros22,624,727
    structural full rank?no
    structural rank12,418
    # of blocks from dmperm82
    # strongly connected comp.13
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typebinary
    structurerectangular
    Cholesky candidate?no
    positive definite?no

    authorS. Buss
    editorT. Davis
    date2009
    kindundirected bipartite graph
    2D/3D problem?no

    Notes:

    A full year of data from July 2008 to July 12, 2009, representing 12,646
users from digg.com.  Each row is a user, each column is a web page.    
From Steven Buss, for the Connectious project.

    Ordering statistics:AMD METIS
    nnz(V) for QR, upper bound nnz(L) for LU4.022762e+09 8.000000e+09
    nnz(R) for QR, upper bound nnz(U) for LU67,239,546 77,061,061

    Maintained by Tim Davis, last updated 21-Oct-2009.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.