[R] Using !is.na() in a HAVING clause in sqldf() XXXX

[Phil Spector]

Dan -
    Try using "having Premie not null" instead of 
"having !is.na(Premie)" .
 					- Phil Spector
 					 Statistical Computing Facility
 					 Department of Statistics
 					 UC Berkeley
 					 spector at stat.berkeley.edu


On Tue, 17 Jan 2012, Dan Abner 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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