No I think the OP wants

mer <- merge(Elder, Younger)

Br. Frede


-------- Oprindelig meddelelse --------
Fra: "Adams, Jean"
Dato:16/01/2014 15.45 (GMT+01:00)
Til: kingsly
Cc: R help
Emne: Re: [R] Doubt in simple merge

You are telling it to merge by ID only.  But it sounds like you would like
it to merge by both ID and age.

merge(Elder, Younger, all=TRUE)

Jean


On Thu, Jan 16, 2014 at 6:25 AM, kingsly <ecokingsly@yahoo.co.in> wrote:

> Dear R community
>
> I have a two data set called "Elder" and "Younger".
> This is my code for simple merge.
>
> Elder <- data.frame(
>   ID=c("ID1","ID2","ID3"),
>   age=c(38,35,31))
> Younger <- data.frame(
>   ID=c("ID4","ID5","ID3"),
>   age=c(29,21,31))
>
> mer <- merge(Elder,Younger,by="ID", all=T)
>
> Output I am expecting:
>
> ID    age
> ID1  38
> ID2  35
> ID3  31
> ID4  29
> ID5  21
>
> It looks very simple.  But I need help.
> When I run the code it gives me age.x and age.y.
> thank you
>
>
>
>
> --
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