Dear Jeff,

Here is a suggestion using tapply:

data.frame(last = with(x, tapply(Value, Name, function(x) x[length(x)])))

See ?tapply for more information.

HTH,
Jorge


On Mon, Nov 16, 2009 at 2:42 PM, Hao Cen <> wrote:

> Hi,
>
> I would like to extract the last row of each group in a data frame.
>
> The data frame is as follows
>
> Name Value
> A 1
> A 2
> A 3
> B 4
> B 8
> C 2
> D 3
>
> I would like to get a data frame as
> Name Value
> A 3
> B 8
> C 2
> D 3
>
> Thank you for your suggestions in advance
>
> Jeff
>
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