[Rd] joining columns as in a relational database

[Douglas Bates]

Marc Schwartz <MSchwartz at medanalytics.com> writes:

> On Tue, 2003-06-24 at 18:07, Douglas Bates wrote:

> > Several questions:
> > 
> >  - Am I duplicating existing functionality?
...

> Prof. Bates,
> 
> Perhaps I am not seeing all of the details but a quick (perhaps too
> quick) review would suggest that merge(), which is in base, would at
> least be a parallel function.

No, you are seeing better than I.  I had not thought to look up merge
- I only thought of join.  I can use merge.  The answer to my first
question is that I am duplicating functionality.

It was an interesting exercise.  Thanks for pointing out merge.