nag_1d_spline_deriv (e02bcc) Example Program Data
   7   7
  0.0      0.0      0.0      0.0      1.0      3.0      3.0      3.0
  4.0      4.0      6.0      6.0      6.0      6.0
 10.0     12.0     13.0     15.0     22.0     26.0     24.0     18.0
 14.0     12.0
  0.0
  1.0
  2.0
  3.0
  4.0
  5.0
  6.0