Matrix: HB/dwt_607

Description: SYMMETRIC CONNECTION TABLE FROM DTNSRDC, WASHINGTON

HB/dwt_607 graph
(undirected graph drawing)

HB/dwt_607 dmperm of HB/dwt_607

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  • Matrix group: HB
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  • download as a MATLAB mat-file, file size: 6 KB. Use UFget(131) or UFget('HB/dwt_607') in MATLAB.
  • download in Matrix Market format, file size: 6 KB.
  • download in Rutherford/Boeing format, file size: 5 KB.

    Matrix properties
    number of rows607
    number of columns607
    nonzeros5,131
    structural full rank?yes
    structural rank607
    # of blocks from dmperm4
    # strongly connected comp.4
    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 AMD9,558
    Cholesky flop count2.7e+05
    nnz(L+U), no partial pivoting, with AMD18,509
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD14,481
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD26,697

    SVD-based statistics:
    norm(A)10.0559
    min(svd(A))1.48539e-17
    cond(A)6.76986e+17
    rank(A)547
    sprank(A)-rank(A)60
    null space dimension60
    full numerical rank?no
    singular value gap2.33068e+12

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

    HB/dwt_607 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.