Matrix: DNVS/ship_003

Description: DNV-Ex 3 : Ship structure from production run-1999-01-17

DNVS/ship_003 graph
(undirected graph drawing)

DNVS/ship_003

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  • Matrix group: DNVS
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  • download as a MATLAB mat-file, file size: 25 MB. Use UFget(1278) or UFget('DNVS/ship_003') in MATLAB.
  • download in Matrix Market format, file size: 23 MB.
  • download in Rutherford/Boeing format, file size: 17 MB.

    Matrix properties
    number of rows121,728
    number of columns121,728
    nonzeros3,777,036
    structural full rank?yes
    structural rank121,728
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries4,308,998
    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 AMD86,552,266
    Cholesky flop count1.9e+11
    nnz(L+U), no partial pivoting, with AMD172,982,804
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD191,020,703
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD357,423,502

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4308998 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.