func CdfRayleighQinv(q float64, sigma float64) float64 { return float64(C.gsl_cdf_rayleigh_Qinv(C.double(q), C.double(sigma))) }
// RayleighQinv returns the cumulative distribution function Qinv(x) for // the upper tail of a rayleigh distribution. func RayleighQinv(Q, sigma float64) float64 { return float64(C.gsl_cdf_rayleigh_Qinv(C.double(Q), C.double(sigma))) }