"JL" == Jerry Lewis <Jerry.Lewis at biogenidec.com>
on Mon, 14 Dec 2009 11:15:10 +0100 (CET) writes:
JL> Full_Name: Jerry W. Lewis Version: 2.10.0 OS: XP
JL> Professional Submission from: (NULL) (96.237.55.233)
JL> For a degenerate Poisson distribution (lambda==0),
JL> qpois(p,0,lower.tail) should return 0 for any valid p,
JL> but qpois(1,0) and qpois(0,0,F) incorrectly return Inf.
It's very much a borderline case.
But you are right. This will be fixed in the next versions of R,
but not yet in R 2.10.1 released a few hours ago ... ;-)
Martin Maechler, ETH Zurich