WBetax WBetaxc WIbeta WIbetac WIbetaci WIbetacia WIbetacib WIbetad WIbetai WIbetaia WIbetaib

WIbetad() Function WIbetad ( A As  Double, B As  Double, X As  Double  ) Derivative of normalized incomplete beta function Ix(a, b) Purpose This function computes the partial derivative with respect to x of the normalized incomplete beta function Ix(a, b). d/dx Ix(a, b) = (1 - x)^(b - 1)*x^(a - 1)/B(a, b) Returns Partial derivative with respect to x of Ix(a, b). Parameters [in] A Argument a. (A > 0) [in] B Argument b. (B > 0) [in] X Argument x. (0 <= X <= 1) Reference boost/math/special_functions