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

  • Matrix: Mittelmann/watson_2
  • Description: Linear programming problem (H. Mittelmann test set)
  • download as a MATLAB mat-file, file size: 8 MB. Use UFget(1662) or UFget('Mittelmann/watson_2') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Mittelmann/watson_2

    dmperm of Mittelmann/watson_2

    Matrix properties
    number of rows352,013
    number of columns677,224
    nonzeros1,846,391
    structural full rank?yes
    structural rank352,013
    # of blocks from dmperm26,816
    # strongly connected comp.1
    entries not in dmperm blocks26,815
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typereal
    structurerectangular
    Cholesky candidate?no
    positive definite?no

    author
    editorH. Mittelmann
    date2005
    kindlinear programming problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 352013-by-1
    cfull 677224-by-1
    lofull 677224-by-1
    hifull 677224-by-1
    z0full 1-by-1

    Notes:

    Hans Mittelmann test set, http://plato.asu.edu/ftp/lptestset
minimize c'*x, subject to A*x=b and lo <= x <= hi

    Ordering statistics:AMD METIS DMPERM+
    nnz(V) for QR, upper bound nnz(L) for LU161,734,588 70,988,826 162,584,454
    nnz(R) for QR, upper bound nnz(U) for LU4,411,257 4,789,575 4,374,781

    Maintained by Tim Davis, last updated 05-Mar-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.