Matrix: HB/wm1

Description: U NONSYMMETRIC MATRIX COEFFICIENT MATRIX OF THE WORLD MODEL -SZYLD-IEA-

HB/wm1 graph
(bipartite graph drawing)

HB/wm1 dmperm of HB/wm1
scc of HB/wm1

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: HB
  • Click here for a description of the HB 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: 20 KB. Use UFget(275) or UFget('HB/wm1') in MATLAB.
  • download in Matrix Market format, file size: 19 KB.
  • download in Rutherford/Boeing format, file size: 16 KB.

    Matrix properties
    number of rows207
    number of columns277
    nonzeros2,909
    structural full rank?yes
    structural rank207
    # of blocks from dmperm50
    # strongly connected comp.29
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typereal
    structurerectangular
    Cholesky candidate?no
    positive definite?no

    authorD. Szyld
    editorI. Duff, R. Grimes, J. Lewis
    date1982
    kindeconomic problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD4,537
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD4,771

    SVD-based statistics:
    norm(A)295.778
    min(svd(A))0.14513
    cond(A)2038.02
    rank(A)207
    sprank(A)-rank(A)0
    null space dimension0
    full numerical rank?yes

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

    HB/wm1 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.