betax betaxc ibeta ibetac ibetaci ibetacia ibetacib ibetad ibetai ibetaia ibetaib

betax() double betax ( double  a, double  b, double  x  ) Incomplete beta function Bx(a, b) Purpose betax computes the incomplete beta function Bx(a, b) = ∫t^(a-1)*(1-t)^(b-1) dt [0, x] Returns Incomplete beta function Bx(a, b). Parameters [in] a Argument a. (a > 0) [in] b Argument b. (b > 0) [in] x Argument x. (0 <= x <= 1) Error handling If a <= 0, b <= 0, x < 0 or x > 1, domain error (EDOM) occurs. Range error (ERANGE) may occur. Reference boost/math/special_functions