nag_sparseig_feast_real_gen_solve (f12jkc) Example Program Data
  5               n
  9               nnz
  3.5   1    1
  2.1   1    3
  1.4   2    2
  1.6   2    5
 -2.1   3    1
  3.5   3    3
 -1.3   4    4
 -0.1   5    2
  1.7   5    5  a[i], irow[i], icol[i], i=0,...,nnz-1