• UF Sparse Matrix Collection
  • Matrix group: Hamm
  • Click here for a description of the Hamm group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups

  • Matrix: Hamm/scircuit
  • Description: Steve Hamm, Motorola. Circuit,many parasitics (Steve.Hamm@motorola.com)
  • download as a MATLAB mat-file, file size: 6 MB. Use UFget(544) or UFget('Hamm/scircuit') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Hamm/scircuit

    dmperm of Hamm/scircuit

    scc of Hamm/scircuit

    Hamm/scircuit graph

    Matrix properties
    number of rows170,998
    number of columns170,998
    nonzeros958,936
    structural full rank?yes
    structural rank170,998
    # of blocks from dmperm153
    # strongly connected comp.48
    entries not in dmperm blocks418
    explicit zero entries0
    nonzero pattern symmetry 100%
    numeric value symmetry 80%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorS. Hamm
    editorT. Davis
    date2001
    kindcircuit simulation problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 170998-by-1

    Ordering statistics:AMD METIS DMPERM+
    nnz(chol(P*(A+A'+s*I)*P'))1,241,108 1,415,802 1,240,352
    Cholesky flop count2.6e+07 3.7e+07 2.6e+07
    nnz(L+U), no partial pivoting2,311,218 2,660,606 2,310,124
    nnz(V) for QR, upper bound nnz(L) for LU4,195,077 4,616,925 4,278,841
    nnz(R) for QR, upper bound nnz(U) for LU8,418,462 9,484,461 8,362,810

    Maintained by Tim Davis, last updated 04-May-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.