Matrix: HB/dwt_234

Description: SYMMETRIC CONNECTION TABLE FROM DTNSRDC, WASHINGTON

HB/dwt_234 graph
(undirected graph drawing)


HB/dwt_234 dmperm of HB/dwt_234

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: HB
  • Click here for a description of the HB group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups
  • download as a MATLAB mat-file, file size: 2 KB. Use UFget(118) or UFget('HB/dwt_234') in MATLAB.
  • download in Matrix Market format, file size: 2 KB.
  • download in Rutherford/Boeing format, file size: 2 KB.

    Matrix properties
    number of rows234
    number of columns234
    nonzeros834
    structural full rank?yes
    structural rank234
    # of blocks from dmperm7
    # strongly connected comp.7
    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 AMD718
    Cholesky flop count2.5e+03
    nnz(L+U), no partial pivoting, with AMD1,202
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD1,215
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD2,301

    SVD-based statistics:
    norm(A)4.5831
    min(svd(A))0.0141968
    cond(A)322.826
    rank(A)234
    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_234 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.