beta cbeta cbeta_sub clbeta clbeta_sub lbeta

lbeta() double lbeta ( double  a, double  b  ) Logarithm of beta function ln(B(a, b)) Purpose lbeta computes the logarithm of the beta function ln(B(a, b)). B(a, b) = Γ(a)Γ(b)/Γ(a + b) Returns Logarithm of the beta function ln(B(a, b)). Parameters [in] a Argument a. (a > 0) [in] b Argument b. (b > 0) Error handling If a <= 0 or b <= 0, domain error (EDOM) occurs. Range error (ERANGE) may occur.