[R] Efficient way to do a merge in R

[Matthew Dowle]

"Joshua Wiley" <jwiley.psych at gmail.com> wrote in message 
news:CANz9Z_KopuwkzB-zxr96PVuLhHf2ZNxNtxSO9xnyhO-_JUMkcQ at mail.gmail.com...
> On Tue, Oct 4, 2011 at 12:40 AM, Rainer Schuermann
> <rainer.schuermann at gmx.net> wrote:
>>> Any comments are very welcome,
>>
>> 3. If that fails, and nobody else has a better idea, I would consider 
>> using a database engine for the job.
>
> Not a bad idea for working with large datasets either.
>
or, the data.table package
http://datatable.r-forge.r-project.org/

Matthew