Matrix: Boeing/msc01050

Description: SYMMETRIC TEST MATRIX FROM MSC/NASTRAN STARF8.OUT2

Boeing/msc01050 graph
(undirected graph drawing)


Boeing/msc01050

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  • Matrix group: Boeing
  • Click here for a description of the Boeing group.
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  • download as a MATLAB mat-file, file size: 94 KB. Use UFget(358) or UFget('Boeing/msc01050') in MATLAB.
  • download in Matrix Market format, file size: 82 KB.
  • download in Rutherford/Boeing format, file size: 57 KB.

    Matrix properties
    number of rows1,050
    number of columns1,050
    nonzeros26,198
    structural full rank?yes
    structural rank1,050
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries2,958
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorR. Grimes
    editorT. Davis
    date1995
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD28,305
    Cholesky flop count1.0e+06
    nnz(L+U), no partial pivoting, with AMD55,560
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD61,864
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD123,084

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2958 explicit zero entries.

    SVD-based statistics:
    norm(A)2.10093e+07
    min(svd(A))4.58458e-09
    cond(A)4.5826e+15
    rank(A)1,049
    sprank(A)-rank(A)1
    null space dimension1
    full numerical rank?no
    singular value gap3.48931e+07

    singular values (MAT file):click here
    SVD method used:s = svd (full (A)) ;
    status:ok

    Boeing/msc01050 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.