Template Engine Package for R?

From: Jason Rupert <jasonkrupert at yahoo.com>
Subject: Re: [R] R File I/O Capability - Writing output to specific lines of existing file
To: "jim holtman" <jholtman at gmail.com>
Cc: R-help at r-project.org
Date: Wednesday, April 8, 2009, 11:26 PM
Darn.

I was afraid of this.  Always kind of weak when it comes to
file I/O approaches, so I guess I will have to stretch and
try to put something together.   

Yeah.  The input flat text file is about 600 lines long.  I
will be replacing about 200.  I already have the template
for those 200 lines.  I guess I will just need to read down
to line 400 and replace until line 600.  

Thanks again for all the insights regarding this. 



--- On Wed, 4/8/09, jim holtman <jholtman at gmail.com>
wrote:

From: jim holtman <jholtman at gmail.com>
Subject: Re: [R] R File I/O Capability - Writing

output to specific lines of  existing file

To: jasonkrupert at yahoo.com
Cc: R-help at r-project.org
Date: Wednesday, April 8, 2009, 8:02 PM
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.