[R] How to duplicate rows in dataframe?
Mike Saunders
mike_saunders at umenfa.maine.edu
Mon Dec 13 21:37:28 CET 2004
Christian:
You should be able to do this with the command:
dataframe[order(dataframe$x),]
See order or sort in the R help for optional arguments that can customize
the way you want to deal with ties.
Mike
----- Original Message -----
From: "cstrato" <cstrato at aon.at>
To: <r-help at stat.math.ethz.ch>
Sent: Monday, December 13, 2004 2:02 PM
Subject: [R] How to duplicate rows in dataframe?
> Dear all:
>
> I have the following (simple?) problem:
> Consider a dataframe where the first column contains
> integers used as index, e.g.
> index
> 24
> 13
> 46
> 32
>
> Now I have the following vector used to sort the dataframe:
> x <- c(13,24,32,46)
> Sorting the dataframe can be done by using order.
>
> However consider the following vector:
> x <- c(13,32,13,24,46,24,24)
> Now I want to get the dataframe in the order of the rows
> defined in x, i.e. the dataframe contains duplicate rows.
> One way to achieve this would be to use rbind in a for-loop.
>
> My question is:
> Is there an easier and - more important - faster way to
> obtain the dataframe as defined in x?
>
> Thank you in advance.
> Best regards
> Christian
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