[R] for loop with global variables

[Petr PIKAL]

Hi

Something like
paste("output", i, sep = ".")
shall work
You could consult FAQ
7.34 How can I save the result of each iteration in a loop into a separate 
file

Regards
Petr



r-help-bounces at r-project.org napsal dne 28.04.2011 17:17:48:

> Petr PIKAL <petr.pikal at precheza.cz> 
> Odeslal: r-help-bounces at r-project.org
> 
> 28.04.2011 17:17
> 
> Komu
> 
> ivan <i.petzev at gmail.com>
> 
> Kopie
> 
> r-help at r-project.org
> 
> Předmět
> 
> Re: [R] for loop with global variables
> 
> Hi
> 
> r-help-bounces at r-project.org napsal dne 28.04.2011 16:59:26:
> 
> > ivan <i.petzev at gmail.com> 
> > Odeslal: r-help-bounces at r-project.org
> > 
> > 28.04.2011 16:59
> > 
> > Komu
> > 
> > jim holtman <jholtman at gmail.com>
> > 
> > Kopie
> > 
> > r-help at r-project.org
> > 
> > Předmět
> > 
> > Re: [R] for loop with global variables
> > 
> > Hi,
> > 
> > thank you for the response. What I actually want to do is pick 
> automatically
> > the results of the various outputs (which I have already defined as
> > variables, e.g. output.1,output.2,etc) and insert them into a table. 
The
> > list variable would be redundant since in order to create the data 
frame 
> I
> > would rather type data.frame(results=rbind(output.1,output.2,etc.)). 
If 
> I
> > had 100 outputs, this would be much work. I rather meant something 
like
> > for(i in 1:100) {x=data.frame(results=rbind(output.[[i]]))}, which 
does 
> not
> > work though. It says that object "output." cannot be found.
> > 
> > Kind Regards
> 
> That is the problem. If you used list in the first time you could save 
> yourself much problems. BTW - data frame is also a list with some 
special 
> formating.
> 
> To extend my example
> 
> for(i in 1:3) {
> lll[[i]] <- sample(letters,3)
> names(lll)[i] <- LETTERS[i]
> }
> 
> lll
> $A
> [1] "x" "t" "h"
> $B
> [1] "c" "m" "w"
> $C
> [1] "n" "s" "e"
> 
>  as.data.frame(lll)
>   A B C
> 1 x c n
> 2 t m s
> 3 h w e
> 
> Regards
> Petr
> 
> 
> 
> 
> > 
> > 
> > 
> > On Thu, Apr 28, 2011 at 4:31 PM, jim holtman <jholtman at gmail.com> 
wrote:
> > 
> > > Yes you can, but there is not enough explaination as to what you
> > > really want to do.  I would suggest that you look at using a 'list'
> > > instead of individual objects:
> > >
> > > myList <- list(output.1 = rbind('a','b'), output.2 = rbind('c','d'), 

> ...)
> > >
> > > Then you can use 'lapply' to operation on the elements.
> > >
> > > On Thu, Apr 28, 2011 at 10:16 AM, ivan <i.petzev at gmail.com> wrote:
> > > > Hi,
> > > >
> > > > is there a possibility to use global variables in a for loop. More
> > > > specifically, I want to do the following:
> > > >
> > > > output.1<-rbind("a","b")
> > > > output.2<-rbind("c","d")
> > > > output.3<-rbind("e","f")
> > > > .
> > > > .
> > > > .
> > > > output.n<-rbind(...,...)
> > > >
> > > > next I want to create a data frame with two columns:
> > > >
> > > > Outputs
> > > > Values  output.1 "a","b"  output.2 "c","d"  output.3 "e","f"  .
> > > >  .
> > > >  output.n …,…
> > > > My problem is that I do not how to define a loop over global 
> variables.
> > > > Anybody an idea?
> > > >
> > > > Thanks.
> > > >
> > > >        [[alternative HTML version deleted]]
> > > >
> > > >
> > > > ______________________________________________
> > > > R-help at 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
> > > Data Munger Guru
> > >
> > > What is the problem that you are trying to solve?
> > >
> > 
> >    [[alternative HTML version deleted]]
> > 
> > ______________________________________________
> > R-help at 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 at 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.