Example Program Data for nag_sparse_mat_ex01
  8   3                          : m, n_diag
  2                              : diag_indx(1)
   1.3 -2.4  3.5  4.6 -5.7  6.8         
 -3                              : diag_indx(2)
                  4.1  5.2 -6.3  7.4 -8.5
  0                              : diag_indx(3)
   1.1 -2.2  3.3  4.4 -5.5  6.6  7.7  8.8