Betax Betax_sub Betaxc Betaxc_sub Ibeta Ibeta_sub Ibetac Ibetac_sub Ibetaci Ibetaci_sub Ibetacia Ibetacia_sub Ibetacib Ibetacib_sub Ibetad Ibetad_sub Ibetai Ibetai_sub Ibetaia Ibetaia_sub Ibetaib Ibetaib_sub

Ibetai_sub() Sub Ibetai_sub ( Ret As  Double, A As  Double, B As  Double, P As  Double, Py As  Double, Optional Info As  Long  ) Inverse function of x for normalized incomplete beta function Ix(a, b) (Subroutine version) Purpose Computes the inverse function of x for normalized incomplete beta function Ix(a, b). Parameters [out] Ret Inverse function of x for normalized incomplete beta function Ix(a, b). [in] A Argument a. (A > 0) [in] B Argument b. (B > 0) [in] P Value of Ix(a, b). (0 <= P <= 1) [out] Py 1 - x is returned. 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