// SphBessel returns the spherical bessel function jl(x) func SphBessel(l int, x float64) float64 { var y C.double switch l { case 0: y = C.gsl_sf_bessel_j0(C.double(x)) case 1: y = C.gsl_sf_bessel_j1(C.double(x)) case 2: y = C.gsl_sf_bessel_j2(C.double(x)) default: y = C.gsl_sf_bessel_jl(C.int(l), C.double(x)) } return float64(y) }
func Jl(l int32, x float64) float64 { return float64(C.gsl_sf_bessel_jl(C.int(l), C.double(x))) }