Matrix: JGD_Taha/abtaha2

Description: Taha matrix set from Abdul Salam Jarrah, New Mexico State Univ.

JGD_Taha/abtaha2 graph
(bipartite graph drawing)


JGD_Taha/abtaha2

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: JGD_Taha
  • Click here for a description of the JGD_Taha group.
  • Click here for a list of all matrices
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  • download as a MATLAB mat-file, file size: 246 KB. Use UFget(2201) or UFget('JGD_Taha/abtaha2') in MATLAB.
  • download in Matrix Market format, file size: 368 KB.
  • download in Rutherford/Boeing format, file size: 322 KB.

    Matrix properties
    number of rows37,932
    number of columns331
    nonzeros137,228
    structural full rank?yes
    structural rank331
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typeinteger
    structurerectangular
    Cholesky candidate?no
    positive definite?no

    authorA. Jarrah
    editorJ.-G. Dumas
    date2008
    kindcombinatorial problem
    2D/3D problem?no

    Notes:

    Taha matrix set from Abdul Salam Jarrah, New Mexico State Univ.
    From Jean-Guillaume Dumas' Sparse Integer Matrix Collection,   
    http://ljk.imag.fr/membres/Jean-Guillaume.Dumas/simc.html      
                                                                   
    http://www.math.nmsu.edu/~ajarrah                              
                                                                   
    Filename in JGD collection: Taha/mat2_abtaha.sms               
    

    Ordering statistics:result
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD8,424,812
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD54,388

    SVD-based statistics:
    norm(A)24.4742
    min(svd(A))2.00281
    cond(A)12.2199
    rank(A)331
    sprank(A)-rank(A)0
    null space dimension0
    full numerical rank?yes

    singular values (MAT file):click here
    SVD method used:s = svd (full (R)) ; where [~,R,E] = spqr (A) with droptol of zero
    status:ok

    JGD_Taha/abtaha2 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.