[R] Bayesian package
Spencer Graves
spencer.graves at pdf.com
Mon Apr 14 11:36:14 CEST 2003
GAMMA-POISSON: Am I correct that the discrete marginal of a
gamma-Poisson is negative binomial? Try, "?pnbinom" for that. The
posterior is another gamma; use "?pgamma", etc., for that.
GAMMA FUNCTION WITH LARGE ARGUMENTS:
> lgamma(284)
[1] 1318.403
> gamma(284)
[1] Inf
Acceptable?
Spencer Graves
Ramon Martínez Coscollà wrote:
> We are trying to obtain a predictive distribution in a Poisson model using a
> non-informative prior distribution. We have found a gamma poisson as a
> result of our analysis and we want to evaluate it in R. Is there any package
> where this distribution and anothers are defined?
>
> In any case, we have tried to programm the gammapoisson probability function
> but we have found another problem: we must evaluate a gamma function with a
> quite high value (gamma(284)). How can it be done?
>
> Thank you very much!
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
More information about the R-help
mailing list