[R-sig-Geo] joining 'n' tables in R

[Roger Bivand]

On Mon, 12 Jun 2006, Sorin Cheval wrote:

> Hello,
> 
> I need to join 110 tables (.txt files) in R based on a
> common field. If anyone has a suggestion, I'd
> appreciate a lot.

Perhaps have a look at ?merge, and try it out on a simple example first. 
It merges data.frame objects, and the by=, by.x= and by.y= arguments can 
be used to define the common field. Watch sort=, because by default the 
rows will be sorted.

> 
> Thanks,
> Sorin Cheval
> 
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-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no