Matrix: Meszaros/stat96v5

Description: linear programming problem, C. Meszaros test set

Meszaros/stat96v5 graph
(bipartite graph drawing)


Meszaros/stat96v5 dmperm of Meszaros/stat96v5
scc of Meszaros/stat96v5

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  • download as a MATLAB mat-file, file size: 638 KB. Use UFget(1776) or UFget('Meszaros/stat96v5') in MATLAB.
  • download in Matrix Market format, file size: 823 KB.
  • download in Rutherford/Boeing format, file size: 271 KB.

    Matrix properties
    number of rows2,307
    number of columns75,779
    nonzeros233,921
    structural full rank?no
    structural rank2,305
    # of blocks from dmperm3
    # strongly connected comp.3
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typereal
    structurerectangular
    Cholesky candidate?no
    positive definite?no

    author
    editorC. Meszaros
    date2005
    kindlinear programming problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 2307-by-1
    cfull 75779-by-1
    lofull 75779-by-1
    hifull 75779-by-1
    z0full 1-by-1

    Notes:

    http://www.sztaki.hu/~meszaros/public_ftp/lptestset      
    Converted to standard form via Resende and Veiga's mpsrd:
    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 COLAMD84,909,388
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD2,655,373

    SVD-based statistics:
    norm(A)19.5234
    min(svd(A))0
    cond(A)Inf
    rank(A)2,305
    sprank(A)-rank(A)0
    null space dimension2
    full numerical rank?no
    singular value gapInf

    singular values (MAT file):click here
    SVD method used:s = svd (full (R)) ; where [~,R,E] = spqr (A') with droptol of zero
    status:ok

    Meszaros/stat96v5 svd

    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.