NYPA/Maragal_5 graph

Matrix: NYPA/Maragal_5

Description: Rank deficient least squares problem, D. Maragal, NY Power Authority

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  • Matrix group: NYPA
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  • download as a MATLAB mat-file, file size: 375 KB. Use UFget(1888) or UFget('NYPA/Maragal_5') in MATLAB.
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    NYPA/Maragal_5

    dmperm of NYPA/Maragal_5

    scc of NYPA/Maragal_5

    Matrix properties
    number of rows4,654
    number of columns3,320
    nonzeros93,091
    structural full rank?no
    structural rank2,690
    # of blocks from dmperm163
    # strongly connected comp.25
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typereal
    structurerectangular
    Cholesky candidate?no
    positive definite?no

    authorD. Maragal
    editorT. Davis
    date2008
    kindleast squares problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 4654-by-1

    Notes:

    rank deficient (rank(A) < sprank(A) < size(A,2))
rank: 2147 sprank: 2690 columns: 3320

    Ordering statistics:AMD METIS
    nnz(V) for QR, upper bound nnz(L) for LU3,347,442 1,864,692
    nnz(R) for QR, upper bound nnz(U) for LU2,883,495 2,984,082

    Maintained by Tim Davis, last updated 05-Nov-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.