Matrix: HB/dwt_209

Description: SYMMETRIC CONNECTION TABLE FROM DTNSRDC, WASHINGTON

HB/dwt_209 graph
(undirected graph drawing)


HB/dwt_209

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  • Matrix group: HB
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  • download as a MATLAB mat-file, file size: 2 KB. Use UFget(116) or UFget('HB/dwt_209') in MATLAB.
  • download in Matrix Market format, file size: 2 KB.
  • download in Rutherford/Boeing format, file size: 2 KB.

    Matrix properties
    number of rows209
    number of columns209
    nonzeros1,743
    structural full rank?yes
    structural rank209
    # 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 AMD2,024
    Cholesky flop count2.2e+04
    nnz(L+U), no partial pivoting, with AMD3,839
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD2,991
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD5,863

    SVD-based statistics:
    norm(A)10.4397
    min(svd(A))1.68097e-16
    cond(A)6.21053e+16
    rank(A)208
    sprank(A)-rank(A)1
    null space dimension1
    full numerical rank?no
    singular value gap4.77151e+13

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

    HB/dwt_209 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.