func GammaIncP(a float64, x float64) float64 { return float64(C.gsl_sf_gamma_inc_P(C.double(a), C.double(x))) }
/* Complementary Normalized Incomplete Gamma Function * * P(a,x) = 1/Gamma(a) Integral[ t^(a-1) e^(-t), {t,0,x} ] * * a > 0, x >= 0 * * exceptions: GSL_EDOM */ func GammaIncP(a, x float64) (r float64) { r = float64(C.gsl_sf_gamma_inc_P(C.double(a), C.double(x))) return }