Matrix: Springer/ESOC

Description: European Space Operations Center orbit estimates

Springer/ESOC graph
(bipartite graph drawing)

Springer/ESOC dmperm of Springer/ESOC
scc of Springer/ESOC

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  • Matrix group: Springer
  • Click here for a description of the Springer group.
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  • download as a MATLAB mat-file, file size: 49 MB. Use UFget(1860) or UFget('Springer/ESOC') in MATLAB.
  • download in Matrix Market format, file size: 57 MB.
  • download in Rutherford/Boeing format, file size: 51 MB.

    Matrix properties
    number of rows327,062
    number of columns37,830
    structural full rank?no
    structural rank37,349
    # of blocks from dmperm74
    # strongly connected comp.482
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    Cholesky candidate?no
    positive definite?no

    authorT. Springer and F. Dilssner
    editorT. Davis
    kindleast squares problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD1,835,049,395
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD33,359,282

    SVD-based statistics:
    null space dimension481
    full numerical rank?no
    singular value gapInf

    singular values (MAT file):click here
    SVD method used:s = svd (full (R)) ; where [~,R,E] = spqr (A) with droptol of zero

    Springer/ESOC 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.