Matrix: Bai/rw496

Description: MARKOV CHAIN MODELING, RANDOM WALK (M = 30) G. W. STEWART

Bai/rw496 graph Bai/rw496 graph
(bipartite graph drawing) (graph drawing of A+A')


Bai/rw496 dmperm of Bai/rw496

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  • Matrix group: Bai
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  • download as a MATLAB mat-file, file size: 5 KB. Use UFget(335) or UFget('Bai/rw496') in MATLAB.
  • download in Matrix Market format, file size: 8 KB.
  • download in Rutherford/Boeing format, file size: 6 KB.

    Matrix properties
    number of rows496
    number of columns496
    nonzeros1,859
    structural full rank?yes
    structural rank496
    # of blocks from dmperm6
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 47%
    numeric value symmetry 0%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorG. Stewart
    editorZ. Bai, D. Day, J. Demmel, J. Dongarra
    date1978
    kindstatistical/mathematical problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD7,606
    Cholesky flop count1.6e+05
    nnz(L+U), no partial pivoting, with AMD14,716
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD8,263
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD15,093

    SVD-based statistics:
    norm(A)1.14682
    min(svd(A))5.74972e-11
    cond(A)1.99456e+10
    rank(A)496
    sprank(A)-rank(A)0
    null space dimension0
    full numerical rank?yes

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

    Bai/rw496 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.