[R] Can merge function pick up mismatch part of two data set?

[David Winsemius]

On Apr 22, 2010, at 2:58 PM, alex46015 wrote:

>
> SAS can merge two data set A, B  in different way,  A or B, A and B,  
> A not B,
> Can R merge function do the same way?

Yes.

>
> Thanks
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David Winsemius, MD
West Hartford, CT