Matrix: DNVS/shipsec5

Description: DNV-PARASOL Ship section 5-1999-01-15

DNVS/shipsec5 graph
(undirected graph drawing)

DNVS/shipsec5 dmperm of DNVS/shipsec5

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  • Matrix group: DNVS
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  • download as a MATLAB mat-file, file size: 28 MB. Use UFget(1280) or UFget('DNVS/shipsec5') in MATLAB.
  • download in Matrix Market format, file size: 27 MB.
  • download in Rutherford/Boeing format, file size: 18 MB.

    Matrix properties
    number of rows179,860
    number of columns179,860
    nonzeros4,598,604
    structural full rank?yes
    structural rank179,860
    # of blocks from dmperm36
    # strongly connected comp.36
    explicit zero entries5,514,492
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorC. Damhaug
    editorJ. Koster
    date1999
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD60,477,906
    Cholesky flop count9.6e+10
    nnz(L+U), no partial pivoting, with AMD120,775,952
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD163,166,216
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD304,811,535

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 5514492 explicit zero entries.

    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.