Re: [R] how to create many variables at one time?
On Wed, Mar 4, 2009 at 2:34 PM, Manli Yan manliyanrh...@gmail.com wrote: Hi: I need to create many variables at one time,how to do this in R? for eg ,X1,X2...X100? It depends what you want. If you want 100 random normal variables of length 10, stored in a data.frame with names V1, V2, ..., V100 try dat - as.data.frame(replicate(100, rnorm(10))) hth, Kingsford Jones Thanks~ [[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] how to create many variables at one time?
Hi Manli, you may consider structuring your data in some appropriate form like data.frame or list. Its often not the best way holding information separated in many variables. But if you *really* want to create 100 separate variables, something like for (i in 1:100) assign(paste(X,i,sep=), some_values) will do the job. Manli Yan schrieb: Hi: I need to create many variables at one time,how to do this in R? for eg ,X1,X2...X100? Thanks~ [[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. -- Eik Vettorazzi Institut für Medizinische Biometrie und Epidemiologie Universitätsklinikum Hamburg-Eppendorf Martinistr. 52 20246 Hamburg T ++49/40/42803-8243 F ++49/40/42803-7790 __ 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] how to create many variables at one time?
Dear Manli,
Do you mean the names of the variables? If so, something like this should
work:
paste('X',1:100,sep=)
HTH,
Jorge
On Wed, Mar 4, 2009 at 4:34 PM, Manli Yan manliyanrh...@gmail.com wrote:
Hi:
I need to create many variables at one time,how to do this in R?
for eg ,X1,X2...X100?
Thanks~
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PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] how to create many variables at one time?
Have you considered using a 'list'? much easier to manage than a lot of individual objects. mylist - lapply(1:100, runif) On Wed, Mar 4, 2009 at 4:34 PM, Manli Yan manliyanrh...@gmail.com wrote: Hi: I need to create many variables at one time,how to do this in R? for eg ,X1,X2...X100? Thanks~ [[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. -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? __ 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] how to create many variables at one time?
You can also change the column names to something else en mass: colnames(dat) - paste(X,1:100,sep=) I next tried constructing the Xn names inside data.frame, but failed using the paste function. The help page for data.frame has a paragraph that begins How the names of the data frame are created is complex... At least the following will result in names of the form X.1, X.2 ... dat - data.frame( X = replicate(100, rnorm(10)) ) -- David Winsemius On Mar 4, 2009, at 4:44 PM, Kingsford Jones wrote: On Wed, Mar 4, 2009 at 2:34 PM, Manli Yan manliyanrh...@gmail.com wrote: Hi: I need to create many variables at one time,how to do this in R? for eg ,X1,X2...X100? It depends what you want. If you want 100 random normal variables of length 10, stored in a data.frame with names V1, V2, ..., V100 try dat - as.data.frame(replicate(100, rnorm(10))) hth, Kingsford Jones Thanks~ [[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. __ 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.
