Beta Cbeta Clnbeta Lnbeta

Lnbeta() Function Lnbeta ( A As  Double, B As  Double, Optional Info As  Long  ) Logarithm of beta function ln(B(a, b)) Purpose This routine computes the logarithm of the beta function ln(B(a, b)). ln(B(a, b)) = ln(Γ(a)Γ(b)/Γ(a + b)) Returns Double Logarithm of the beta function ln(B(a, b)). Parameters [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.