[R] The gamma function and infinity
Peter Dalgaard
p.dalgaard at biostat.ku.dk
Mon Dec 5 17:14:47 CET 2005
Florent Bresson <f_bresson at yahoo.fr> writes:
> I have to calculate some formula like:
>
> gamma(x)/(gamma(x+y)
>
> and I observed that for relatively big values of x, R
> returns infinity and so cannot compute the formula. Is
> it possible to force R to give the real value of
> gamma(x) instead of Inf ?
No, it is overflowing the floating point representation.
How about using lgamma? That's basically what it is for.
--
O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B
c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
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~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
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