[R] Opening all files in a directory

[Mark Myatt]

MATT BORKOWSKI <mpb170 at psu.edu> writes:
>Is there any way that R can be programmed so that it will cycle through 
>all files in a directory without having to define file names?  The reason I ask
>is because I will have about 50-100 files in a directory which will be randomly
>named.  ie:  MIDEX, OACES-CO2, ODEN91, etc...  
>
>If not...are there any languages out there that will do this sort of things?  Or 
>is
>there another method you could recommend for handling the problem?

Something like:

cycle <- function(file.path = ".", file.pattern = "*.dat")
  {
  files.2.process <- dir(path = file.path, pattern = file.pattern)
  for(file.name in files.2.process)
    {
    current.file <- read.table(file.name, header = TRUE)
    #
    # now do something with this data ...
    #
    }
  }    

Does it for me. The file.pattern parameter takes regular expressions.

Mark


--
Mark Myatt


-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._