Matrix: HB/dwt_1242

Description: SYMMETRIC CONNECTION TABLE FROM DTNSRDC, WASHINGTON

HB/dwt_1242 graph
(undirected graph drawing)


HB/dwt_1242

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  • Matrix group: HB
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  • download as a MATLAB mat-file, file size: 11 KB. Use UFget(112) or UFget('HB/dwt_1242') in MATLAB.
  • download in Matrix Market format, file size: 12 KB.
  • download in Rutherford/Boeing format, file size: 11 KB.

    Matrix properties
    number of rows1,242
    number of columns1,242
    nonzeros10,426
    structural full rank?yes
    structural rank1,242
    # 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 AMD21,665
    Cholesky flop count5.8e+05
    nnz(L+U), no partial pivoting, with AMD42,088
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD31,052
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD58,683

    SVD-based statistics:
    norm(A)9.3912
    min(svd(A))7.06201e-34
    cond(A)1.32982e+34
    rank(A)1,178
    sprank(A)-rank(A)64
    null space dimension64
    full numerical rank?no
    singular value gap2.01283e+10

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

    HB/dwt_1242 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.