R help - May 2008 - how can i sort a column of data.frame ?

i have a data.frame with several columns that i want to sort one of them (one
column) by descending order
 in such way that this sorting out  recover all colums. what should i do?
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hanen <hanen.mastouri <at> yahoo.fr> writes:
> 
> 
> i have a data.frame with several columns that i want to sort one of them
(one
> column) by descending order
>  in such way that this sorting out  recover all colums. what should i do?
Maybe I missed something special you need, because I don't fully understand
what
"recover all columns" means. Try first with the description in the
FAQ:

<http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-can-I-sort-the-rows-of-a-data-frame_003f>

Dieter Menne

? order

df<-data.frame(a=rnorm(20),b=rpois(20,5),c=runif(20))
or<-order(df$b,decreasing=T)
df.or<-df[or,]

Weidong Gu
Department of Medicine
University of Alabama, Birmingham
1900 University Blvd., Birmingham, Alabama 35294

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of hanen
Sent: Monday, May 19, 2008 1:11 PM
To: r-help at r-project.org
Subject: [R] how can i sort a column of data.frame ?


i have a data.frame with several columns that i want to sort one of them
(one
column) by descending order
 in such way that this sorting out  recover all colums. what should i
do?
-- 
View this message in context:
http://www.nabble.com/how-can-i-sort-a-column-of-data.frame---tp17324725
p17324725.html
Sent from the R help mailing list archive at Nabble.com.

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