Matrix: DNVS/shipsec8

Description: DNV-Ex 6 : Ship section/detail from production run-1999-01-17

DNVS/shipsec8 graph
(undirected graph drawing)

DNVS/shipsec8 dmperm of DNVS/shipsec8

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  • Matrix group: DNVS
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  • download as a MATLAB mat-file, file size: 20 MB. Use UFget(1281) or UFget('DNVS/shipsec8') in MATLAB.
  • download in Matrix Market format, file size: 19 MB.
  • download in Rutherford/Boeing format, file size: 14 MB.

    Matrix properties
    number of rows114,919
    number of columns114,919
    structural full rank?yes
    structural rank114,919
    # of blocks from dmperm49
    # strongly connected comp.49
    explicit zero entries3,349,846
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?yes
    positive definite?yes

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

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD48,416,528
    Cholesky flop count9.3e+10
    nnz(L+U), no partial pivoting, with AMD96,718,137
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD124,693,327
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD235,112,223

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 3349846 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.