Message-ID: <433122A9.2030707@free.fr>
Date: 2005-09-21T09:06:49Z
From: Romain Francois
Subject: Sort a data frame with respect to more than one variable
In-Reply-To: <20050921085431.75995.qmail@web25807.mail.ukl.yahoo.com>
Le 21.09.2005 10:54, Marc Bernard a ??crit :
>Dear All,
>
>How can I sort a data frame with respect to more than one variable?
>
>I know that for one variable X one may use: df[order(df$X), ] where df is the data frame containing X.
>
>Many thanks,
>
>Bernard
>
>
You already know the answer of that question. order() accepts more than
one variable.
x <- rep(rbinom(5,size=4,prob=.5), 6)
y <- rnorm(30)
cbind(x,y)[ order(x,y) , ]
Romain
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~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~
~~~~~~ Romain FRANCOIS - http://addictedtor.free.fr ~~~~~~
~~~~ Etudiant ISUP - CS3 - Industrie et Services ~~~~
~~ http://www.isup.cicrp.jussieu.fr/ ~~
~~~~ Stagiaire INRIA Futurs - Equipe SELECT ~~~~
~~~~~~ http://www.inria.fr/recherche/equipes/select.fr.html ~~~~~~
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