Matrix: YZhou/circuit204

Description: Circuit simulation problem, Y. Zhou, Carleton Univ, Canada

YZhou/circuit204 graph YZhou/circuit204 graph
(bipartite graph drawing) (graph drawing of A+A')

YZhou/circuit204 dmperm of YZhou/circuit204
scc of YZhou/circuit204

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  • download as a MATLAB mat-file, file size: 21 KB. Use UFget(1896) or UFget('YZhou/circuit204') in MATLAB.
  • download in Matrix Market format, file size: 30 KB.
  • download in Rutherford/Boeing format, file size: 27 KB.

    Matrix properties
    number of rows1,020
    number of columns1,020
    structural full rank?yes
    structural rank1,020
    # of blocks from dmperm157
    # strongly connected comp.114
    explicit zero entries0
    nonzero pattern symmetry 44%
    numeric value symmetry 37%
    Cholesky candidate?no
    positive definite?no

    authorY. Zhou
    editorT. Davis
    kindcircuit simulation problem
    2D/3D problem?no


    block size 204*204

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD10,796
    Cholesky flop count1.4e+05
    nnz(L+U), no partial pivoting, with AMD20,572
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD17,570
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD37,329

    SVD-based statistics:
    null space dimension0
    full numerical rank?yes

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

    YZhou/circuit204 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.