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

  • Matrix: Gset/G3
  • Description: Random matrix, 3% uniformly distributed. No diagonal. G3=pattern of G8
  • download as a MATLAB mat-file, file size: 69 KB. Use UFget(491) or UFget('Gset/G3') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Gset/G3

    Gset/G3 graph

    Matrix properties
    number of rows800
    number of columns800
    nonzeros38,352
    structural full rank?yes
    structural rank800
    # of blocks from dmperm1
    # strongly connected comp.1
    entries not in dmperm blocks0
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typebinary
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorC. Helmberg
    editorY. Ye
    date1996
    kindundirected random graph
    2D/3D problem?no

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))237,419 246,794
    Cholesky flop count1.0e+08 1.1e+08
    nnz(L+U), no partial pivoting474,038 492,788
    nnz(V) for QR, upper bound nnz(L) for LU305,798 306,613
    nnz(R) for QR, upper bound nnz(U) for LU320,308 320,137

    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.