Matrix: Zitney/rdist1

Description: Chemical process separation, Steve Zitney, Cray Research

Zitney/rdist1 graph Zitney/rdist1 graph
(bipartite graph drawing) (graph drawing of A+A')

Zitney/rdist1 dmperm of Zitney/rdist1
scc of Zitney/rdist1

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  • Matrix group: Zitney
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  • download as a MATLAB mat-file, file size: 713 KB. Use UFget(839) or UFget('Zitney/rdist1') in MATLAB.
  • download in Matrix Market format, file size: 949 KB.
  • download in Rutherford/Boeing format, file size: 880 KB.

    Matrix properties
    number of rows4,134
    number of columns4,134
    structural full rank?yes
    structural rank4,134
    # of blocks from dmperm199
    # strongly connected comp.2
    explicit zero entries0
    nonzero pattern symmetry 6%
    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 AMD1,306,165
    Cholesky flop count7.3e+08
    nnz(L+U), no partial pivoting, with AMD2,608,196
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD139,334
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD248,056

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

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

    Zitney/rdist1 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.