Dan -
Try using "having Premie not null" instead of
"having !is.na(Premie)" .
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@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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