Yes, I tried, but the order of the IDs in dat1 and dat2 is not exactly the
same, I simplify the data here. So in dat2, it may have records for ID=0002
first then ID=0001, also I have more than two categories under ID col.


On Tue, May 7, 2013 at 10:57 AM, Chris Stubben <stubben@lanl.gov> wrote:

> > I want to merge dat1 and dat2 based on "ID" in order
>
> Have you tried merge(dat1, dat2) ?
>
> If ID is the common column (and no others), then that should be all you
> need to join (see ?merge).  And then order if needed.
>
> Chris
>
>
>
> --
>
> Chris Stubben
>
> Los Alamos National Lab
> Bioscience Division
> MS M888
> Los Alamos, NM 87545
>
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