Matrix: MathWorks/Pd_rhs

Description: Matrix problem X=A\B with many sparse right-hand-sides

MathWorks/Pd_rhs graph
(bipartite graph drawing)

MathWorks/Pd_rhs dmperm of MathWorks/Pd_rhs
scc of MathWorks/Pd_rhs

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: MathWorks
  • Click here for a description of the MathWorks group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups
  • download as a MATLAB mat-file, file size: 25 KB. Use UFget(1171) or UFget('MathWorks/Pd_rhs') in MATLAB.
  • download in Matrix Market format, file size: 33 KB.
  • download in Rutherford/Boeing format, file size: 34 KB.

    Matrix properties
    number of rows8,081
    number of columns12,406
    structural full rank?no
    structural rank4,368
    # of blocks from dmperm2,872
    # strongly connected comp.14,549
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    Cholesky candidate?no
    positive definite?no

    authorP. Anderson
    editorT. Davis
    kindcounter-example problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD9,829
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD8,788

    SVD-based statistics:
    null space dimension3,713
    full numerical rank?no
    singular value gap6.73494e+07

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

    MathWorks/Pd_rhs 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.