[R] select row

[John Kane]

 ?which

Use it to find the rows and then extract the rows 

 selection  <- mydata[which(mydata$id=="25-2006"), ]

 should work.

--- Leonardo Lami <lami at faunalia.it> wrote:

> Hi all,
> I have a little problem selecting some rows from a
> data.frame.
> I'd like to select the rows where a determinated
> column take a
> partivolar value.
> 
> For example:
> tab
>           id       x       y
> 1    24-2005 1621814 4834991
> 2    24-2005 1621856 4834907
> 3    24-2005 1621763 4834956
> 4   25-2006 1622330 4835189
> 5   25-2006 1622533 4834834
> 6   25-2006 1622535 4834909
> 7   25-2006 1622543 4834803
> 8   28-2005 1622798 4835043
> 9   28-2005 1622299 4835129
> 
> I'd like to select the row where id=25-2006
> 
> I searched on the search of the R site but I did'nt
> find anything of simple.
> Can someone help me?
> 
> Thank you very much
> Leonardo
> 
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