Try this:
library(sqldf)
BODsub <- BOD[1:3,]
sqldf("select * from BOD except select * from BODsub")
For more see: http://sqldf.googlecode.com
On Thu, Mar 12, 2009 at 5:58 PM, Jason Rupert <jasonkrup...@yahoo.com> wrote:
>
> I have two data.frames.
>
> One is the subset of the other. I need to determine what rows were removed
> from the superset data.frame to form the subset data.frame.
>
> I was hoping to turn up functionality similar to setdiff for data.frames, but
> did not have any luck. It seems I need to find a function that performs the
> oposite as "merge".
>
>
>> dim(superset_dataframe)
> [1] 248 31
>> dim(subset_dataframe)
> [1] 214 31
>
> Thank you for any suggestions of functions that might exist that might help.
>
> ______________________________________________
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> and provide commented, minimal, self-contained, reproducible code.
>
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