Did you try a where statement?

where Premie is not null

On Tue, Jan 17, 2012 at 3:03 PM, Dan Abner <dan.abner99@gmail.com> wrote:

> Hi everyone,
>
> I have the following:
>
> sqldf("select Premie,count(tpounds) N,avg(tpounds) Avg_Weight,
>  stddev_samp(tpounds) StdDev
>  from children
>  group by Premie
>  having !is.na(Premie)")
>
> sqldf() does not like the !is.na(Premie) specification. How does one
> exclude a "missing" group in an aggregated query using sqldf()?
>
> Thanks!
>
> Dan
>
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>
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-- 
Joseph C. Magagnoli

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