Matrix: DNVS/shipsec1

Description: DNV-Ex 4 : Ship section/detail from production run-1999-01-17

DNVS/shipsec1 graph
(undirected graph drawing)

DNVS/shipsec1 dmperm of DNVS/shipsec1

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  • Matrix group: DNVS
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  • download as a MATLAB mat-file, file size: 22 MB. Use UFget(1279) or UFget('DNVS/shipsec1') in MATLAB.
  • download in Matrix Market format, file size: 21 MB.
  • download in Rutherford/Boeing format, file size: 15 MB.

    Matrix properties
    number of rows140,874
    number of columns140,874
    structural full rank?yes
    structural rank140,874
    # of blocks from dmperm3
    # strongly connected comp.3
    explicit zero entries4,245,228
    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 AMD41,000,460
    Cholesky flop count5.2e+10
    nnz(L+U), no partial pivoting, with AMD81,860,046
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD136,860,093
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD252,062,773

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4245228 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.