• SJSU Singular Matrix Database
  • Matrix group: HB
  • Click here for a description of the HB group.
  • Click here for a list of all matrices
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  • Matrix: HB/beaflw
  • Description: U NONSYMMETRIC MATRIX U.S. ECONOMY 1972 -SZYLD-I.E.A.-NYU-
  • download as a MATLAB mat-file, file size: 265 KB. Use SJget(357) or SJget('HB/beaflw') in MATLAB.
  • download in Matrix Market format, file size: 270 KB.
  • download in Rutherford/Boeing format, file size: 208 KB.

    HB/beaflw

    Routine svd from Matlab 7.6.0.324 (R2008a) used to calculate the singular values.

    HB/beaflw

    dmperm of HB/beaflw

    scc of HB/beaflw

    Matrix properties (click for a legend)  
    number of rows497
    number of columns507
    structural full rank?no
    structural rank460
    numerical rank 460
    dimension of the numerical null space47
    numerical rank / min(size(A))0.92555
    Euclidean norm of A 2.1922e+005
    calculated singular value # 4600.00014454
    numerical rank defined using a tolerance
    max(size(A))*eps(norm(A)) =
    1.4756e-008
    calculated singular value # 4614.2828e-012
    gap in the singular values at the numerical rank:
    singular value # 460 / singular value # 461
    3.3749e+007
    calculated condition number1.141e+035
    condest-2
    nonzeros53,403
    # of blocks from dmperm13
    # strongly connected comp.13
    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
    SJid357
    UFid79

    Ordering statistics:AMD METIS
    nnz(V) for QR, upper bound nnz(L) for LU83,411 100,588
    nnz(R) for QR, upper bound nnz(U) for LU109,499 111,021

    Maintained by Leslie Foster, last updated 24-Apr-2009.

    Entries 5 through 14 in the table of matrix properties and the singular
    value plot were created using SJsingular code. The other plots
    and statistics are produced using utilities from the SuiteSparse package.
    Matrix color plot pictures by cspy, a MATLAB function in the CSparse package.