Matrix: HB/dwt_310

Description: SYMMETRIC CONNECTION TABLE FROM DTNSRDC, WASHINGTON

HB/dwt_310 graph
(undirected graph drawing)


HB/dwt_310

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  • Matrix group: HB
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  • download as a MATLAB mat-file, file size: 3 KB. Use UFget(122) or UFget('HB/dwt_310') in MATLAB.
  • download in Matrix Market format, file size: 3 KB.
  • download in Rutherford/Boeing format, file size: 3 KB.

    Matrix properties
    number of rows310
    number of columns310
    nonzeros2,448
    structural full rank?yes
    structural rank310
    # 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 AMD3,143
    Cholesky flop count3.5e+04
    nnz(L+U), no partial pivoting, with AMD5,976
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD3,034
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD5,515

    SVD-based statistics:
    norm(A)8.56463
    min(svd(A))0.00261988
    cond(A)3269.09
    rank(A)310
    sprank(A)-rank(A)0
    null space dimension0
    full numerical rank?yes

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

    HB/dwt_310 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.