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

Ibeta() Function Ibeta ( A As  Double, B As  Double, X As  Double, Optional Info As  Long  ) Normalized incomplete beta function Ix(a, b) Purpose Computes the normalized incomplete beta function Ix(a, b). Ix(a, b) = (1/B(a, b))∫t^(a-1)*(1-t)^(b-1) dt [0, x] Returns Double Normalized incomplete beta function Ix(a, b). Parameters [in] A Argument a. (A >= 0, but A = B = 0 is not allowed) [in] B Argument b. (B >= 0, but A = B = 0 is not allowed) [in] X Argument x. (0 <= X <= 1) [out] Info (Optional) = 0: Successful exit. = -1: The argument A had an illegal value. (A < 0, A = B = 0) = -2: The argument B had an illegal value. (B < 0) = -3: The argument X had an illegal value. (X < 0 or X > 1) = 1: Floating point range error. Reference boost/math/special_functions