Matrix: Cannizzo/sts4098

Description: Structural engineering matrix (finite-element), Fabio Cannizzo

Cannizzo/sts4098 graph
(undirected graph drawing)


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  • Matrix group: Cannizzo
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  • download as a MATLAB mat-file, file size: 348 KB. Use UFget(1214) or UFget('Cannizzo/sts4098') in MATLAB.
  • download in Matrix Market format, file size: 332 KB.
  • download in Rutherford/Boeing format, file size: 294 KB.

    Matrix properties
    number of rows4,098
    number of columns4,098
    structural full rank?yes
    structural rank4,098
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorF. Cannizzo
    editorT. Davis
    kindstructural problem
    2D/3D problem?yes

    Additional fieldssize and type
    bsparse 4098-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD138,352
    Cholesky flop count7.0e+06
    nnz(L+U), no partial pivoting, with AMD272,606
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD1,307,076
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD2,075,462

    SVD-based statistics:
    null space dimension0
    full numerical rank?yes

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

    Cannizzo/sts4098 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.