Function tetragamma

inst/include/Rcpp/Rmath.h:196–196

    inline double digamma(double x)	{ return ::Rf_digamma(x); }
    inline double trigamma(double x)	{ return ::Rf_trigamma(x); }
    inline double tetragamma(double x)	{ return ::Rf_tetragamma(x); }
    inline double pentagamma(double x)	{ return ::Rf_pentagamma(x); }

    inline double beta(double a, double b)	{ return ::Rf_beta(a, b); }