[R] R File I/O Capability - Writing output to specific lines of existing file

[jim holtman]

You can always read in the initialization file, make the updates to it
and then write it back out.  If it is a text file, it would be very
hard to write into the middle of it since there is no structure to the
file.  You can read it in as a table (read.table) or just as lines
(readLines) and the make any changes you want.  You can use regular
expressions if you want to put something in the middle of one of the
lines you have read in.

On Wed, Apr 8, 2009 at 10:13 AM, Jason Rupert <jasonkrupert at yahoo.com> wrote:
>
> Currently I am using the R "write" command to output results to a *.txt file and then copying those results into an initialization file.  In an attempt to continue to automate the process I would like to have R write to the location in the existing initialization file, instead of me copying the data over.
>
> By any chance are there any R commands to help?
>
> Primarily, I will be using Windows, and the initialization file is a simple flat file, i.e. not XML or binary.
>
> I looked at:
> (a) http://www.stat.ucl.ac.be/ISdidactique/Rhelp/library/R.io/html/00Index.html
>
> (b) http://search.r-project.org/cgi-bin/namazu.cgi?query=File+I%2FO&max=100&result=normal&sort=score&idxname=functions&idxname=Rhelp08
>
> But, this did not appear to provide the functionality to edit an existing file by adding information to the middle of the file.
>
> Thank you again for any help and insight.
>
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>



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

What is the problem that you are trying to solve?