Hi,


tail(x,2)

or

 x[seq(nrow(x)-1, nrow(x)), ]


HTH,

baptiste

2009/9/14 Peng Yu <pengyu.ut@gmail.com>

> Hi,
>
> x=matrix(1:60,nr=6)
>
> I can refer the last 2 rows by
> x[5:6,]
>
> If I don't know the total number of rows is 6, is there a way to refer
> the last 2 rows?
>
> Regards,
> Peng
>
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> and provide commented, minimal, self-contained, reproducible code.
>



-- 
_____________________________

Baptiste Auguié

School of Physics
University of Exeter
Stocker Road,
Exeter, Devon,
EX4 4QL, UK

http://newton.ex.ac.uk/research/emag
______________________________

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