[R] How can I test for End-Of-FIle

[jim holtman]

You can do something like this:

con <- file("MyFle.txt","r")
 repeat {
  line <-  readLines(con,n=1)
  if (length(line) == 0) break
  ParseLine(line)
 }

On Sun, Jul 12, 2009 at 6:20 PM, <mauede at alice.it> wrote:
> I have a long text file with uneven record length and variable structure.
> Therefore I have to read it line-by-line.
> I found out I can open a connection to the file and read in one line at a time.
> Something like:
>
>  con <- file("MyFle.txt","r")
>  while (End-Of-File) {
>   line <-  readLines(con,n=1)
>   ParseLine(line)
>  }
>
> But I realized I do not know how to test for the End-Of-File condition using R language.
> I found a ghost documentation page mentioning an R built-in function "isEof(connection)".
> But such a function is not listed in R  "utils" package it seems to belong to.
>
> I would appreciate any comment and/or suggestion.
> Thank you in advance.
> Maura
>
>
>
>
>
>
> tutti i telefonini TIM!
>
>
>        [[alternative HTML version deleted]]
>
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>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?