R help - Jun 2009 - Assigning Data a name from within another variable?

Hi All,

I have hunted high and low and tried dozens of things but have yet to
achieve the result I require. Below is my code (taken mostly from another
thread on here) thus far:

files<-list.files()
files<-files[grep('.wm4', files)]
labels<-gsub('.wm4', '',files)

for(i in 1:length(files)){
X<-read.table(files[i])
<My problem is here!>

What I am trying to do now is assign the first item in labels in place of X
so the table name will effectively be whatever is written in labels[1]. The
files simply consist of two columns of real numbers. I have tried several
things, such like replacing X with labels[1], but this simply writes the
data in one long column to the first place of labels(which makes sense). How
do I extract what is in labels[1] and set it as the table name?

As always any help is greatly appreciated.

Kenny Larsen
-- 
View this message in context:
http://www.nabble.com/Assigning-Data-a-name-from-within-another-variable--tp24037279p24037279.html
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Use a 'list' to read in the data and access it:

files<-list.files()
files<-files[grep('.wm4', files)]
labels<-gsub('.wm4', '',files)

myInput <- lapply(files, read.table)
# if you want to get rid of .wm4
names(myInput) <- sub(".wm4$", "", names(myInput))

On Mon, Jun 15, 2009 at 11:50 AM, Kenny Larsen
<k.larsen@sheffield.ac.uk>wrote:
>
> Hi All,
>
> I have hunted high and low and tried dozens of things but have yet to
> achieve the result I require. Below is my code (taken mostly from another
> thread on here) thus far:
>
> files<-list.files()
> files<-files[grep('.wm4', files)]
> labels<-gsub('.wm4', '',files)
>
> for(i in 1:length(files)){
> X<-read.table(files[i])
> <My problem is here!>
>
> What I am trying to do now is assign the first item in labels in place of X
> so the table name will effectively be whatever is written in labels[1]. The
> files simply consist of two columns of real numbers. I have tried several
> things, such like replacing X with labels[1], but this simply writes the
> data in one long column to the first place of labels(which makes sense).
> How
> do I extract what is in labels[1] and set it as the table name?
>
> As always any help is greatly appreciated.
>
> Kenny Larsen
> --
> View this message in context:
>
http://www.nabble.com/Assigning-Data-a-name-from-within-another-variable--tp24037279p24037279.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> 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<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?

	[[alternative HTML version deleted]]

Kenny Larsen wrote:
> Hi All,
>
> I have hunted high and low and tried dozens of things but have yet to
> achieve the result I require. Below is my code (taken mostly from another
> thread on here) thus far:
>
> files<-list.files()
> files<-files[grep('.wm4', files)]
> labels<-gsub('.wm4', '',files)
>
> for(i in 1:length(files)){
> X<-read.table(files[i])
> <My problem is here!>
>
> What I am trying to do now is assign the first item in labels in place of X
> so the table name will effectively be whatever is written in labels[1]. The
> files simply consist of two columns of real numbers. I have tried several
> things, such like replacing X with labels[1], but this simply writes the
> data in one long column to the first place of labels(which makes sense).
How
> do I extract what is in labels[1] and set it as the table name?
>
> As always any help is greatly appreciated.
>
> Kenny Larsen
>   
Hi,

have you checked the r wiki,

http://wiki.r-project.org/rwiki/doku.php?id=guides:assigning-variable-names

this page is a really a work in progress, feel free to add comments.

HTH,

baptiste

Thnaks to both of you, with a combined effort of the Wiki and your code I
have now managed to get teh result I was after. 

When I have a better understanding of what the code is doing I shall make an
effort to contribut to the Wiki!

Cheers,

Kenny

Kenny Larsen wrote:
> 
> Hi All,
> 
> I have hunted high and low and tried dozens of things but have yet to
> achieve the result I require. Below is my code (taken mostly from another
> thread on here) thus far:
> 
> files<-list.files()
> files<-files[grep('.wm4', files)]
> labels<-gsub('.wm4', '',files)
> 
> for(i in 1:length(files)){
> X<-read.table(files[i])
> <My problem is here!>
> 
> What I am trying to do now is assign the first item in labels in place of
> X so the table name will effectively be whatever is written in labels[1].
> The files simply consist of two columns of real numbers. I have tried
> several things, such like replacing X with labels[1], but this simply
> writes the data in one long column to the first place of labels(which
> makes sense). How do I extract what is in labels[1] and set it as the
> table name?
> 
> As always any help is greatly appreciated.
> 
> Kenny Larsen
> 
-- 
View this message in context:
http://www.nabble.com/Assigning-Data-a-name-from-within-another-variable--tp24037279p24054319.html
Sent from the R help mailing list archive at Nabble.com.