Logarithm of the beta function of a real argument.
Loading LOADSUB ALL FROM "GAMMA.HTS"
or LOADSUB FROM "MATHLIB.HTS"
Usage REAL A,B,Y
Y=FNLogbeta(A,B)
Description
FNLogbetareturns the value of the logarithm of the beta function ofaandb, log[B(a,b)].B(a,b) is defined as (a)(b)/(a+b) (seeGamma).B(a,b) is only defined fora> 0 andb> 0.
Errors
FNLogbetacauses an HTBasic error if its arguments are not both of type REAL or if eitheraorbis negative or zero.