nag_sparse_real_rect_sort (f11zcc) Example Program Results

Elements of B
NNZ =    7
                       B    BROW    BCOL
       0      4.0000e+00       3       1
       1      1.0000e+00       1       2
       2     -1.0000e+00       2       4
       3      0.0000e+00       1       4
       4      2.0000e+00       1       1
       5      1.0000e+00       2       3
       6      1.0000e+00       3       3

Elements of C
NNZ =    5
                       C    CROW    CCOL
       0      2.0000e+00       3       4
       1      4.0000e+00       1       1
       2      2.0000e+00       1       3
       3     -1.0000e+00       2       2
       4      1.0000e+00       2       4

Summed and reordered elements of A = B + C, along columns first
NNZ =    8
                       A    IROW    ICOL
       0      6.0000e+00       1       1
       1      4.0000e+00       3       1
       2      1.0000e+00       1       2
       3     -1.0000e+00       2       2
       4      2.0000e+00       1       3
       5      1.0000e+00       2       3
       6      1.0000e+00       3       3
       7      2.0000e+00       3       4

Same matrix in CCS format
NNZ =    8
                       A    IROW    ISTC
       0      6.0000e+00       1       1
       1      4.0000e+00       3       3
       2      1.0000e+00       1       5
       3     -1.0000e+00       2       8
       4      2.0000e+00       1       9
       5      1.0000e+00       2
       6      1.0000e+00       3
       7      2.0000e+00       3

Same matrix with some rows put out of order
NNZ =    8
                       A    IROW    ISTC
       0      4.0000e+00       3       1
       1      6.0000e+00       1       3
       2      1.0000e+00       1       5
       3     -1.0000e+00       2       8
       4      1.0000e+00       3       9
       5      1.0000e+00       2
       6      2.0000e+00       1
       7      2.0000e+00       3

Rows reordered and matrix converted from CCS to CS format
NNZ =    8
                       A    IROW    ICOL
       0      6.0000e+00       1       1
       1      4.0000e+00       3       1
       2      1.0000e+00       1       2
       3     -1.0000e+00       2       2
       4      2.0000e+00       1       3
       5      1.0000e+00       2       3
       6      1.0000e+00       3       3
       7      2.0000e+00       3       4

Transpose of this matrix passed to get row-major order
NNZ =    8
                       A    IROW    ICOL
       0      6.0000e+00       1       1
       1      1.0000e+00       1       2
       2      2.0000e+00       1       3
       3     -1.0000e+00       2       2
       4      1.0000e+00       2       3
       5      4.0000e+00       3       1
       6      1.0000e+00       3       3
       7      2.0000e+00       3       4