Matrix: Mittelmann/watson_2

Description: Linear programming problem (H. Mittelmann test set)

Mittelmann/watson_2 graph
(bipartite graph drawing)

Mittelmann/watson_2 dmperm of Mittelmann/watson_2

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  • 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, file size: 9 MB.
  • download in Rutherford/Boeing format, file size: 7 MB.

    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
    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:result
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD161,734,588
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD4,411,257

    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.