"A.R. Criswell" <[EMAIL PROTECTED]> wrote:
> Hello Andrew Robinson and R-List
>
> Thanks, Andrew, but this does not work. Puttting zero weights on
> structural zeros, one's elsewhere in glm() does not deliver the
> appropriate expected cell counts loglm() provides as one would expect.
>
> If you run the code provided below, you'll see loglm() delivers zero
> cell counts with loglm() but using glm() with the weights you suggest,
> the expected cell counts are not zero.
>
> Still hoping for a resolution.
> Andrew Criswell
>
> Associate Professor
> Hedmark University
> Postboks 104, Rena 2510, NORWAY
If they are structural zeros, I believe you want:
glm(COUNT ~ CONCERNS + AGE + GENDER, data=health, subset=(WEIGHTS>0),
family=poisson)
David Duffy.
--
| David Duffy (MBBS PhD) ,-_|\
| email: [EMAIL PROTECTED] ph: INT+61+7+3362-0217 fax: -0101 / *
| Epidemiology Unit, Queensland Institute of Medical Research \_,-._/
| 300 Herston Rd, Brisbane, Queensland 4029, Australia GPG 4D0B994A v
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