R help - Apr 2005 - Iterative process for reading in text files

Hello

Instead of reading in group1.txt I want to read in groups1 for the first
iteration of i, then groups2 for the second and so on. Obviously I can't use
groups(i) but assume there is a way to do this.

group<-read.table("C:/Data/April 2005/group1.txt",header=T)

thanks in advance

Meredith

Do you mean that you have one file where the data is ordered by 
group? If so, using scan and a loop is an easy option. If you have 
the data in separate files by group, just make a character vector 
with your filenames as elements and use a loop to read the data using 
read.table at each iteration. Or if they all have similar names such 
as group1.txt, group2.txt, etc. you could construct the filenames on 
the fly using paste.

HTH,

Simon.

>Hello
>
>Instead of reading in group1.txt I want to read in groups1 for the 
>first iteration of i, then groups2 for the second and so on. 
>Obviously I can't use groups(i) but assume there is a way to do this.
>
>group<-read.table("C:/Data/April 2005/group1.txt",header=T)
>
>thanks in advance
>
>Meredith
>
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Hi Meredith,

When I've wanted to do this, I put all my files (group1.txt,
group2.txt ...) in a separate directory. Then, running R from that
directory:

files<-list(files)

for (i in 1:length(files)) {
group<-read.table(files[i],header=T)
do stats here
}

On Fri, 2005-04-29 at 15:17 +1000, Briggs, Meredith M
wrote:
> Hello
> 
> Instead of reading in group1.txt I want to read in groups1 for the first
iteration of i, then groups2 for the second and so on. Obviously I can't use
groups(i) but assume there is a way to do this.
> 
> group<-read.table("C:/Data/April 2005/group1.txt",header=T)
> 
> thanks in advance
> 
> Meredith
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html