Re: [R] How to refer to rows using a vector of row names ?

From: Philipp Pagel <>
Date: Fri, 11 Apr 2008 13:56:09 +0200

On Fri, Apr 11, 2008 at 07:00:10PM +0800, Ng Stanley wrote:
> I tried that, it will work well if the vector contain unique row names.
> However, my vector contain duplicate row names.

how about

# generate toy data frame
d = data.frame(x=1:10, y=10:1)
# set up a vector of row names
v = c('1','3','1','4','3')
# select
newd = d[v,]



Dr. Philipp Pagel                              Tel.  +49-8161-71 2131
Lehrstuhl für Genomorientierte Bioinformatik   Fax.  +49-8161-71 2186
Technische Universität München
Wissenschaftszentrum Weihenstephan
85350 Freising, Germany
Institut für Bioinformatik und Systembiologie / MIPS
Helmholtz Zentrum München -
Deutsches Forschungszentrum für Gesundheit und Umwelt
Ingolstädter Landstrasse 1
85764 Neuherberg, Germany

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Received on Fri 11 Apr 2008 - 12:00:12 GMT

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