Betax Betaxc Ibeta Ibetac Ibetaci Ibetacia Ibetacib Ibetad Ibetai Ibetaia Ibetaib

Ibetai() Function Ibetai ( A As  Double, B As  Double, P As  Double, Py As  Double, Optional Info As  Long  ) Normalized incomplete beta function Ix(a, b) inverse for x Purpose This routine returns a value x such that p = Ix(a, b), where p is the specified value of the normalized incomplete beta function. Returns Double Value of x. Parameters [in] A Argument a. (A > 0) [in] B Argument b. (B > 0) [in] P Specified value of normalized incomplete beta function. (0 <= P <= 1) [out] Py Returne 1 - x. The value returned in Py is free from cancellation errors. Even if Ibetai returns 1, the value of Py may be non-zero very small value. [out] Info (Optional) = 0: Successful exit. = -1: The argument A had an illegal value. (A <= 0) = -2: The argument B had an illegal value. (B <= 0) = -3: The argument P had an illegal value. (P < 0 or P > 1) = 1: Floating point range error. Reference boost/math/special_functions