func Rayleigh(r *rng.GslRng, sigma float64) float64 { return float64(C.gsl_ran_rayleigh((*C.gsl_rng)(unsafe.Pointer(r.Ptr())), C.double(sigma))) }
// Rayleigh returns a random variate from the Rayleigh distribution with scale // parameter sigma. func Rayleigh(rng RngState, sigma float64) float64 { return float64(C.gsl_ran_rayleigh(rng.state, C.double(sigma))) }