[R] How to refer to the last a few rows?

Federman, Douglas Douglas.Federman at utoledo.edu
Mon Sep 14 18:03:07 CEST 2009


Try the tail() function

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Peng Yu
Sent: Monday, September 14, 2009 11:32 AM
To: r-help at stat.math.ethz.ch
Subject: [R] How to refer to the last a few rows?

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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