Matrix: Sandia/ASIC_320ks

Description: Sandia, Xyce circuit simulation matrix (base)

Sandia/ASIC_320ks graph
(undirected graph drawing)

Sandia/ASIC_320ks dmperm of Sandia/ASIC_320ks

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  • Matrix group: Sandia
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  • download as a MATLAB mat-file, file size: 5 MB. Use UFget(1418) or UFget('Sandia/ASIC_320ks') in MATLAB.
  • download in Matrix Market format, file size: 8 MB.
  • download in Rutherford/Boeing format, file size: 6 MB.

    Matrix properties
    number of rows321,671
    number of columns321,671
    nonzeros1,316,085
    structural full rank?yes
    structural rank321,671
    # of blocks from dmperm249
    # strongly connected comp.249
    explicit zero entries511,722
    nonzero pattern symmetrysymmetric
    numeric value symmetry 29%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorR. Hoekstra
    editorT. Davis
    date2006
    kindcircuit simulation problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD2,214,107
    Cholesky flop count5.6e+08
    nnz(L+U), no partial pivoting, with AMD4,106,543
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD30,517,340
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD55,273,159

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 511722 explicit zero entries.

    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.