Matrix: Zitney/rdist2

Description: Chemical process separation, Steve Zitney, Cray Research

Zitney/rdist2 graph Zitney/rdist2 graph
(bipartite graph drawing) (graph drawing of A+A')

Zitney/rdist2 dmperm of Zitney/rdist2
scc of Zitney/rdist2

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  • Matrix group: Zitney
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  • download as a MATLAB mat-file, file size: 425 KB. Use UFget(840) or UFget('Zitney/rdist2') in MATLAB.
  • download in Matrix Market format, file size: 557 KB.
  • download in Rutherford/Boeing format, file size: 521 KB.

    Matrix properties
    number of rows3,198
    number of columns3,198
    structural full rank?yes
    structural rank3,198
    # of blocks from dmperm199
    # strongly connected comp.2
    explicit zero entries100
    nonzero pattern symmetry 5%
    numeric value symmetry 0%
    Cholesky candidate?no
    positive definite?no

    authorS. Zitney
    editorT. Davis
    kindchemical process simulation problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD889,283
    Cholesky flop count4.6e+08
    nnz(L+U), no partial pivoting, with AMD1,775,368
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD82,406
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD142,600

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 100 explicit zero entries.

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

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

    Zitney/rdist2 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.