Matrix: JGD_Taha/abtaha2

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

JGD_Taha/abtaha2 graph
(bipartite graph drawing)


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  • Matrix group: JGD_Taha
  • Click here for a description of the JGD_Taha group.
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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
    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%
    Cholesky candidate?no
    positive definite?no

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


    Taha matrix set from Abdul Salam Jarrah, New Mexico State Univ.
    From Jean-Guillaume Dumas' Sparse Integer Matrix Collection,      
    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:
    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

    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.