[Rd] lambda==0 in dpois() (PR#459)
Fri, 25 Feb 2000 14:50:52 -0500 (EST)
On 25 Feb 2000, Peter Dalgaard BSA wrote:
> firstname.lastname@example.org writes:
> > Here's a patch to src/nmath/dpois.c that appears to work (although it could ? be more
> > elegant).
> Thanks. We may just be able to squeeze that one in before 1.0.0. But
> shouldn't it return -Inf (ML_NEGINF) for the log case rather than NaN?
I think you're right.
By the way, it looks like qpois() may be subject to a similar problem,
although I haven't dug in. Don't know about any of the other
distributions (dbinom() looks OK).
Ben Bolker email@example.com
Zoology Department, University of Florida http://www.zoo.ufl.edu/bolker
318 Carr Hall/Box 118525 tel: (352) 392-5697
Gainesville, FL 32611-8525 fax: (352) 392-3704
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