Matrix: Clark/tomographic1

Description: Tomographic reconstruction of a particle field in fluid flow, T. Clark

Clark/tomographic1 graph
(bipartite graph drawing)

scc of Clark/tomographic1

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  • Matrix group: Clark
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  • download as a MATLAB mat-file, file size: 2 MB. Use UFget(2264) or UFget('Clark/tomographic1') in MATLAB.
  • download in Matrix Market format, file size: 3 MB.
  • download in Rutherford/Boeing format, file size: 2 MB.

    Matrix properties
    number of rows73,159
    number of columns59,498
    structural full rank?no
    structural rank42,208
    # of blocks from dmperm3,546
    # strongly connected comp.27,546
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    Cholesky candidate?no
    positive definite?no

    authorT. Clark
    editorT. Davis
    kindcomputer graphics/vision problem
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 73159-by-1


    Tomographic reconstruction of a particle field in fluid flow, T. Clark  
    for a discussion.  The problem can be solved via lsqlin in MATLAB:      
    lb = zeros (n,1) ;                                                      
    x = lsqlin (A, b, [ ], [ ], [ ], [ ], lb) ;                             

    Ordering statistics:result
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD11,451,626
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD213,665,278

    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.