[R] An R clause to bind dataframes under certain contions

[Henrique Dallazuanna]

Try this:

merge(x, y, all=T)


On 26/01/2008, zhihuali <lzhtom at hotmail.com> wrote:
>
> Hi netters,
> Suppose I have two data frames X and Y. X has three colnames A, B and C. Y has three colnames A,B and D.
>
> I want to combine them into one matrix, joining the rows having the same A and B values (X$A==Y$A and X$B = Y$B). So the resulting dataframe has four variables/columns: A,B,C and D.
>
> I was wondering what's the best way to do it in R.  Could anyone give me some advice?
>
> Thanks!
>
> Zhihua Li
>
>
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-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O