• UF Sparse Matrix Collection
  • Matrix group: MathWorks
  • Click here for a description of the MathWorks group.
  • Click here for a list of all matrices
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  • Matrix: MathWorks/Harvard500
  • Description: Web matrix (Numerical Computing with MATLAB, Moler, 2004)
  • download as a MATLAB mat-file, file size: 14 KB. Use UFget(1172) or UFget('MathWorks/Harvard500') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    MathWorks/Harvard500

    scc of MathWorks/Harvard500

    MathWorks/Harvard500 graph

    Matrix properties
    number of rows500
    number of columns500
    nonzeros2,636
    structural full rank?no
    structural rank233
    # of blocks from dmperm51
    # strongly connected comp.147
    explicit zero entries0
    nonzero pattern symmetry 41%
    numeric value symmetry 41%
    typebinary
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorC. Moler
    editorT. Davis
    date2002
    kinddirected graph
    2D/3D problem?no

    Additional fieldssize and type
    nodenamefull 500-by-93

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))3,247 3,685
    Cholesky flop count3.2e+04 4.4e+04
    nnz(L+U), no partial pivoting5,994 6,870
    nnz(V) for QR, upper bound nnz(L) for LU33,077 6,169
    nnz(R) for QR, upper bound nnz(U) for LU23,904 25,189

    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.