[R] Input to variables - help please

(Ted Harding) Ted.Harding at manchester.ac.uk
Wed May 13 22:12:27 CEST 2009

On 13-May-09 19:49:35, Steve Sidney wrote:
> Dear list
> I have managed to write a short program to evaluate data which is
> inputted from a csv file using the following
> x = read.csv("wms_results.csv", header=TRUE)
> All works fine but since I have a number of similar data files which
> have different names, I would like the program to allow me to input
> the file name, rather than having to edit the program.
> From the documentation I am unclear how to replace the "filename.csv"
> with a string varaiable so that from the keyboard I can input the name.
> Also which command can I use to output some text to the monitor as a
> prompt
> Any help would be great and apologies for such a simple question.
> Thanks
> Regards
> Steve


  NextFile <- readline("Enter the CSV filename:\n")
  x = read.csv(NextFile, header=TRUE)

You will then get a prompt "Enter the CSV filename:"
so enter it. Then it will read it.

Example (from the terminal):

  > NextFile <- readline("Enter the CSV filename:\n")
  Enter the CSV filename:
  > NextFile
  [1] "ACBDEFG.csv"


E-Mail: (Ted Harding) <Ted.Harding at manchester.ac.uk>
Fax-to-email: +44 (0)870 094 0861
Date: 13-May-09                                       Time: 21:12:19
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