[R] using R selecte data record?

[David Winsemius]

On Nov 11, 2009, at 8:53 PM, chalie epps wrote:

> I have a database containing all the football tournament, however I
> want only to filter out all the pairwise events.
> Briefly:
> If A matches B & B matches A, we reserve the two tournament, otherwise
> forsake this tournament.

Sounds like you might want an inner join:

?merge

>
-- 

David Winsemius, MD
Heritage Laboratories
West Hartford, CT