Kunden <- Kunden_2011
Kunden <- merge(Kunden, Kunden_2012,
by = "Debitor", all = TRUE)
etc.
See ?merge for details.
Best,
Ista
On Wed, Apr 20, 2016 at 2:23 AM, <g.maub...@weinwolf.de> wrote:
> Hi All,
>
> I would like to match some datasets. Both deliver variables AND cases
> which might or might not be present in all datasets:
>
> This sequence
>
> Kunden <- Kunden_2011
> Kunden <- merge(Kunden, Kunden_2012,
> by.x = "Debitor", by.y = "Debitor")
>
> Kunden <- merge(Kunden, Kunden_2013,
> by.x = "Debitor", by.y = "Debitor")
>
> Kunden <- merge(Kunden, Kunden_2014,
> by.x = "Debitor", by.y = "Debitor")
>
> Kunden <- merge(Kunden, Kunden_2015,
> by.x = "Debitor", by.y = "Debitor")
>
> delivers too few cases. So I guess it does an equi-join.
>
> How can I join the datasets and keep the variables as well as the cases?
>
> I am looking forward to your reply.
>
> Kind regards
>
> Georg
>
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