nag_specfun_kelvin_kei_vector (s19arc) Example Program Results x f ivalid 0.000e+00 -7.854e-01 0 1.000e-01 -7.769e-01 0 1.000e+00 -4.950e-01 0 2.500e+00 -1.107e-01 0 5.000e+00 1.119e-02 0 1.000e+01 -3.075e-04 0 1.500e+01 7.963e-06 0