[R] union of two data frames

[Wensui Liu]

stephen,
are you sure you want a union? in db term, union has a specific meaning.
it seems to me you want a innerjoin, isn't it?
sqldf package is a good one, which will also help you grasp the
knowledge of SQL and complete your request as well.

On Mon, Feb 25, 2008 at 4:59 PM, stephen sefick <ssefick at gmail.com> wrote:
> I have a thirty thousand row data frame imported from excel and a
>  60,000 row data frame imported from excel.  they share a common subset
>  of the same data and I would like to combine the two into one data
>  frame merged together on the data in common.  I have looked at the
>  help file for merge and intersect and cbind and rbind etc... And I
>  can't figure it out.  Thanks in advance
>
>  Stephen
>
>  --
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>  annoying little problems of being mammals.
>
>                                                                 -K. Mullis
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WenSui Liu
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