Message-ID: <200008242045.WAA25703@pubhealth.ku.dk>
Date: 2000-08-24T20:45:54Z
From: Thomas Lumley
Subject: too large alpha or beta in dbeta ? (PR#643)
On Thu, 24 Aug 2000, Troels Ring wrote:
> Dear friends.
>
> Is this as expected ? Is alpha and beta too large simply ?
>
> > dbeta(.1,534,646)
> [1] NaN
> Warning message:
> NaNs produced in: dbeta(x, shape1, shape2, log)
well, it should work, but the correct answer is effectively zero.
pbeta(.1,534,646) gives 3.6e-213
Perhaps more worrying is
> dbeta(.25,534,646)
[1] Inf
-thomas
Thomas Lumley
Assistant Professor, Biostatistics
University of Washington, Seattle
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