[R] Iterate over a list of input files?

[Tsjerk Wassenaar]

Hi Mark,

If you have a function that, for a given file name, returns the data
in the way you want, then you can use 'dir' or 'paste' to generate a
list of names, which you can read in in one go with apply:

my_read <- function(filename)
{
 ...
}

filenames <- dir(directory,pattern)
filenames <- paste(...)

data <- apply(filenames, my_read)

Hope it helps,

Tsjerk

On Wed, Feb 9, 2011 at 1:50 AM, dunner <ross.dunne at tcd.ie> wrote:
>
> Quick and dirty answer:
>
> Try ?paste in conjunction with a "for" loop which iterates over
> i:length(Files), and you can paste "i" onto the end of your filename, then
> add the data to cd=list(), cd[i], then "unlist" the data or
> as.data.frame(cd).
>
> I'm sure there are more elegant alternatives.
>
> Ross
> --
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-- 
Tsjerk A. Wassenaar, Ph.D.

post-doctoral researcher
Molecular Dynamics Group
* Groningen Institute for Biomolecular Research and Biotechnology
* Zernike Institute for Advanced Materials
University of Groningen
The Netherlands