Re: [R] Change positions of columns in data frame
dataframe xx x1 x2 x3 1 2 5 2 4 1 5 6 0 1 1 2 data.frame(xx$x2,xx$x1,xx$x3) # or Awkward but works --- On Fri, 10/23/09, Joel Fürstenberg-Hägg joel_furstenberg_h...@hotmail.com wrote: From: Joel Fürstenberg-Hägg joel_furstenberg_h...@hotmail.com Subject: [R] Change positions of columns in data frame To: r-help@r-project.org Received: Friday, October 23, 2009, 10:19 AM Hi all, Probably a simple question, but I just can't find a simple answear in the older threads or anywhere else. I've added some new vectors as columns in a data frame using cbind(). As they're all put as the last columns inte the data frame, I would like to move them to specific positions. How do you do to change the position of a column in a data frame? I know I can use fieldTrial0809=data.frame(Sample_ID=as.factor(fieldTrial0809$Sample_ID), Plant_ID=as.factor(fieldTrial0809$Plant_ID), ...) to create a new data frame with the given columns in the specified order, but there must be an easier way..? All the best, Joel _ Nya Windows 7 - Hitta en dator som passar dig! Mer information. http://windows.microsoft.com/shop [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ Be smarter than spam. See how smart SpamGuard is at giving ju __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Change positions of columns in data frame
DF[ ,names(DF)[c(your_preferred_order)]] -Peter Ehlers Joel Fürstenberg-Hägg wrote: Hi all, Probably a simple question, but I just can't find a simple answear in the older threads or anywhere else. I've added some new vectors as columns in a data frame using cbind(). As they're all put as the last columns inte the data frame, I would like to move them to specific positions. How do you do to change the position of a column in a data frame? I know I can use fieldTrial0809=data.frame(Sample_ID=as.factor(fieldTrial0809$Sample_ID), Plant_ID=as.factor(fieldTrial0809$Plant_ID), ...) to create a new data frame with the given columns in the specified order, but there must be an easier way..? All the best, Joel _ Nya Windows 7 - Hitta en dator som passar dig! Mer information. http://windows.microsoft.com/shop [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Change positions of columns in data frame
Joel -
Suppose the columns are named x1, x2, x3, x4, and x5.
You can use subscripting:
x[c('x2','x4','x1','x3','x5')]
or, to save typing the quotes
subset(x,select=c(x2,x4,x1,x3,x5))
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Fri, 23 Oct 2009, Joel Fürstenberg-Hägg wrote:
Hi all,
Probably a simple question, but I just can't find a simple answear in the older
threads or anywhere else.
I've added some new vectors as columns in a data frame using cbind(). As
they're all put as the last columns inte the data frame, I would like to move
them to specific positions. How do you do to change the position of a column in
a data frame?
I know I can use
fieldTrial0809=data.frame(Sample_ID=as.factor(fieldTrial0809$Sample_ID),
Plant_ID=as.factor(fieldTrial0809$Plant_ID), ...) to create a new data frame
with the given columns in the specified order, but there must be an easier
way..?
All the best,
Joel
_
Nya Windows 7 - Hitta en dator som passar dig! Mer information.
http://windows.microsoft.com/shop
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Change positions of columns in data frame
You can change the order of nearly everything just by applying an appropriate index and assigning to the original object. Something like data - data[,order_of_columns] Tom Joel Fürstenberg-Hägg schrieb: Hi all, Probably a simple question, but I just can't find a simple answear in the older threads or anywhere else. I've added some new vectors as columns in a data frame using cbind(). As they're all put as the last columns inte the data frame, I would like to move them to specific positions. How do you do to change the position of a column in a data frame? I know I can use fieldTrial0809=data.frame(Sample_ID=as.factor(fieldTrial0809$Sample_ID), Plant_ID=as.factor(fieldTrial0809$Plant_ID), ...) to create a new data frame with the given columns in the specified order, but there must be an easier way..? All the best, Joel _ Nya Windows 7 - Hitta en dator som passar dig! Mer information. http://windows.microsoft.com/shop [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Technische Universität München Department für Pflanzenwissenschaften Lehrstuhl für Grünlandlehre Am Hochanger 1 85350 Freising / Germany Phone: ++49 (0)8161 715324 Fax: ++49 (0)8161 713243 email: tom.gottfr...@wzw.tum.de http://www.wzw.tum.de/gruenland __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Change positions of columns in data frame
Hi Joel, The answers you've received already, suggesting subscripting, are good because they strengthen your understanding of R subscripting. However, sometimes these methods produce strange column names. So, what I usually do is use the subset command. You don't have to provide anything for the subset argument (i.e., you'll keep all the rows) but you can re-order the columns by listing them in the order you want, within the select argument, like this DF-subset(DF,select=c(var3,var2,var1)) HTH, Mark 2009/10/23 Joel Fürstenberg-Hägg joel_furstenberg_h...@hotmail.com Hi all, Probably a simple question, but I just can't find a simple answear in the older threads or anywhere else. I've added some new vectors as columns in a data frame using cbind(). As they're all put as the last columns inte the data frame, I would like to move them to specific positions. How do you do to change the position of a column in a data frame? I know I can use fieldTrial0809=data.frame(Sample_ID=as.factor(fieldTrial0809$Sample_ID), Plant_ID=as.factor(fieldTrial0809$Plant_ID), ...) to create a new data frame with the given columns in the specified order, but there must be an easier way..? All the best, Joel _ Nya Windows 7 - Hitta en dator som passar dig! Mer information. http://windows.microsoft.com/shop [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Mark Na University of Saskatchewan Saskatoon, Canada [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
