NYPA/Maragal_3 graph

Matrix: NYPA/Maragal_3

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

  • UF Sparse Matrix Collection
  • Matrix group: NYPA
  • Click here for a description of the NYPA group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups
  • download as a MATLAB mat-file, file size: 81 KB. Use UFget(1886) or UFget('NYPA/Maragal_3') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    NYPA/Maragal_3

    dmperm of NYPA/Maragal_3

    scc of NYPA/Maragal_3

    Matrix properties
    number of rows1,690
    number of columns860
    nonzeros18,391
    structural full rank?no
    structural rank765
    # of blocks from dmperm35
    # strongly connected comp.11
    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 1690-by-1

    Notes:

    rank deficient (rank(A) < sprank(A) < size(A,2))
rank: 613 sprank: 765 columns: 860

    Ordering statistics:AMD METIS
    nnz(V) for QR, upper bound nnz(L) for LU394,148 175,285
    nnz(R) for QR, upper bound nnz(U) for LU234,994 235,647

    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.