nag_sparse_nsym_sort (f11zac) Example Program Data
  5                   n
  15                  nnz
  4.   3    1
 -2.   5    2
  1.   4    4
 -2    4    2
 -3    5    5
  1.   1    2
  0.   1    5
  1.   3    5
 -1.   2    4
  6.   5    5
  2.   1    1
  2.   4    2
  1.   2    3
  1.   3    3
  2.   4    5         a[i-1], irow[i-1], icol[i-1], i=1,...,nnz