Matrix: HB/dwt_1005

Description: SYMMETRIC CONNECTION TABLE FROM DTNSRDC, WASHINGTON

HB/dwt_1005 graph
(undirected graph drawing)


HB/dwt_1005

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  • Matrix group: HB
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  • download as a MATLAB mat-file, file size: 10 KB. Use UFget(110) or UFget('HB/dwt_1005') in MATLAB.
  • download in Matrix Market format, file size: 10 KB.
  • download in Rutherford/Boeing format, file size: 9 KB.

    Matrix properties
    number of rows1,005
    number of columns1,005
    nonzeros8,621
    structural full rank?yes
    structural rank1,005
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typebinary
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorG. Everstine, D. Taylor
    editorI. Duff, R. Grimes, J. Lewis
    date1980
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD19,001
    Cholesky flop count6.6e+05
    nnz(L+U), no partial pivoting, with AMD36,997
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD30,980
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD57,016

    SVD-based statistics:
    norm(A)16.4065
    min(svd(A))3.88612e-18
    cond(A)4.22181e+18
    rank(A)995
    sprank(A)-rank(A)10
    null space dimension10
    full numerical rank?no
    singular value gap6.25819e+12

    singular values (MAT file):click here
    SVD method used:s = svd (full (A)) ;
    status:ok

    HB/dwt_1005 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.