You're submitting queries for SQLDF to execute as strings. So, if you want
to use a variable column name, sprintf() or paste() your statement together,
like:

sqldf(sprintf('select sum(%s) as XSUM, Y as Y from testdf group by Y',
var1))

--
Robert Tirrell | rpt@stanford.edu | (607) 437-6532
Program in Biomedical Informatics | Butte Lab | Stanford University


> sqldf("select sum(return(var1)) as XSUM,
>       Y             as Y
>       from testdf
>       group by Y")
>
>
>
> --
> Michael Schumacher
> mike.schumacher@gmail.com
> Manager Data & Analytics, ValueClick
> 818-851-8638
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

	[[alternative HTML version deleted]]

