FNBetareturns the value ofB(a,b), whereBrepresents thebetafunction.B(a,b) is defined as (a)(b)/(a+b) (seeGamma).B(a,b) is only defined fora> 0 andb> 0.
Errors
FNBetacauses an HTBasic error if its arguments are not all of type REAL or if eitheraorbis negative or zero.