• 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_1
  • Description: Linear programming problem (H. Mittelmann test set)
  • download as a MATLAB mat-file, file size: 5 MB. Use UFget(1661) or UFget('Mittelmann/watson_1') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Mittelmann/watson_1

    dmperm of Mittelmann/watson_1

    Matrix properties
    number of rows201,155
    number of columns386,992
    nonzeros1,055,093
    structural full rank?yes
    structural rank201,155
    # of blocks from dmperm15,326
    # strongly connected comp.1
    entries not in dmperm blocks15,325
    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 201155-by-1
    cfull 386992-by-1
    lofull 386992-by-1
    hifull 386992-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 LU65,685,720 35,840,545 74,439,326
    nnz(R) for QR, upper bound nnz(U) for LU2,484,725 2,728,637 2,492,877

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