Matrix: Buss/12month1

Description: 12 months, 12,646 users from Steven Buss

Buss/12month1 graph
(bipartite graph drawing)

scc of Buss/12month1

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

    Matrix properties
    number of rows12,471
    number of columns872,622
    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%
    Cholesky candidate?no
    positive definite?no

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


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

    SVD-based statistics:
    null space dimension54
    full numerical rank?no
    singular value gap4.63112e+12

    singular values (MAT file):click here
    SVD method used:s = svd (full (R)) ; where [~,R,E] = spqr (A') with droptol of zero

    Buss/12month1 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.