Matrix: HVDC/hvdc2

Description: Power simulation matrix, Alex Wang, Manitoba HVDC, Canada

HVDC/hvdc2 graph HVDC/hvdc2 graph
(bipartite graph drawing) (graph drawing of A+A')

HVDC/hvdc2 dmperm of HVDC/hvdc2
scc of HVDC/hvdc2

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  • Matrix group: HVDC
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  • download as a MATLAB mat-file, file size: 10 MB. Use UFget(1875) or UFget('HVDC/hvdc2') in MATLAB.
  • download in Matrix Market format, file size: 15 MB.
  • download in Rutherford/Boeing format, file size: 13 MB.

    Matrix properties
    number of rows189,860
    number of columns189,860
    nonzeros1,339,638
    structural full rank?yes
    structural rank189,860
    # of blocks from dmperm69
    # strongly connected comp.67
    explicit zero entries7,635
    nonzero pattern symmetry 99%
    numeric value symmetry 6%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorA. Wang
    editorT. Davis
    date2007
    kindpower network problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 189860-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD1,317,751
    Cholesky flop count2.3e+07
    nnz(L+U), no partial pivoting, with AMD2,445,642
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD2,389,738
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD4,803,364

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 7635 explicit zero entries.

    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.