[R] how to keep keep matching column in output of merge

Ben Bolker bbolker at gmail.com
Tue Jan 4 15:20:41 CET 2011


Nevil Amos <nevil.amos <at> gmail.com> writes:

> How do I keep the linking column[s] in a merge()?
>   I need to use the values again in a further merge.

  simple reproducible example please?
(e.g. make up a couple of 4-row datasets that show what you
want, what you are trying, and what you are getting instead).



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