Re: [R] R File I/O Capability - Writing output to specific lines of existing file
With only 600 lines, it is relatively easy to read it in and replace
some lines. For example (untested) is you wanted to replace lines
150:250 with your data, you would do
input - readLines('filename')
input - c(input[1:149], newData, input[251:length(input)])
writeLines(input, file='filename')
That does not seem too hard.
On Thu, Apr 9, 2009 at 12:26 AM, Jason Rupert jasonkrup...@yahoo.com wrote:
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 jholt...@gmail.com wrote:
From: jim holtman jholt...@gmail.com
Subject: Re: [R] R File I/O Capability - Writing output to specific lines of
existing file
To: jasonkrup...@yahoo.com
Cc: R-help@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
jasonkrup...@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%2FOmax=100result=normalsort=scoreidxname=functionsidxname=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.
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained,
reproducible code.
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem that you are trying to solve?
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem that you are trying to solve?
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
[R] R File I/O Capability - Writing output to specific lines of existing file
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%2FOmax=100result=normalsort=scoreidxname=functionsidxname=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. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] R File I/O Capability - Writing output to specific lines of existing file
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 jasonkrup...@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%2FOmax=100result=normalsort=scoreidxname=functionsidxname=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. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
