[R] Re: R 0.64.2 at CRAN

Peter Dalgaard BSA p.dalgaard at biostat.ku.dk
Tue Jul 6 18:44:36 CEST 1999

Ben Bolker <ben at eno.princeton.edu> writes:

> > (and the text needs rewriting too, it's a "compound Poisson
> > distribution", not "heterogeneous Poisson process", right?)
> > 
> > 
>   Mea culpa.
>   Both of these corrections are right.
>   (Just out of curiousity--I know that "compound Poisson process" is
> the technically correct term.  I meant "heterogeneous" in a non-technical
> sense, although I can see that "compound" is better.  Does "heterogeneous"
> in this context have any exact implied technical meaning?)

I think "heterogeneous Poisson process" is OK for a Poisson
process where the intensity varies over time. But there is no
"process" here, only a distribution obtained by compounding the
Gamma and Poisson. 

A (single) distribution cannot in my mind be heterogeneous, unless
perhaps if it's "lumpy", "multimodal", etc...

   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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