From p.dalgaard@biostat.ku.dk  Fri Apr  9 09:55:56 1999
From: p.dalgaard@biostat.ku.dk (p.dalgaard@biostat.ku.dk)
Date: Fri, 9 Apr 1999 10:55:56 +0200
Subject: Error in ppois function (PR#161)
Message-ID: <199904090855.KAA00972@blueberry.kubism.ku.dk>

ripley@stats.ox.ac.uk writes:

> and R-0.64.1 does
> 
> > ppois(1.5, 2)
> [1] 0.4060058
> > ppois(1.1, 2)
> [1] 0.4060058
> > dpois(1.1, 2)
> Warning: non-integer x = 1.100000
> [1] 0
> 
> Happy?

Almost. Do you use round(x) - x < 1e-7 or some such as criterion for
"integer"? (although I'd be hard pressed to come up with a natural
example where the argument to dpois is subject to FP accuracy issues)

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

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Error in ppois function (PR#161)
p.dalgaard@biostat.ku.dk