Beta Beta_sub Cbeta Clnbeta Lnbeta Lnbeta_sub

Lnbeta_sub() Sub Lnbeta_sub ( Ret As  Double, A As  Double, B As  Double, Optional Info As  Long  ) Logarithm of beta function ln(B(a, b)) (Subroutine version) Purpose Computes the logarithm of the beta function ln(B(a, b)). ln(B(a, b)) = ln(Γ(a)Γ(b)/Γ(a + b)) Parameters [out] Ret Logarithm of the beta function ln(B(a, b)). [in] A Argument a. (A > 0) [in] B Argument b. (B > 0) [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) = 1: Floating point range error.