Hello I'm fairly new to R. I have a script which produces a 1-column vector (numeric). I can write it to a text file using the write command. What I want to do is to run the script a number of times on different input files, producing a different 1-column vector each time and save all the vectors to a text file so that each vector is one separate column in the text file. I had thought of appending each new vector as a new column in the unique text file, but I don't know if this is possible. At the moment, it looks like I will have to create a separate text file each time I run the script. -- View this message in context: http://r.789695.n4.nabble.com/writing-appending-a-text-file-tp3467882p3467882.html Sent from the R help mailing list archive at Nabble.com.
writing/appending a text file
3 messages · PBFrance, David Winsemius, jim holtman
On Apr 22, 2011, at 8:40 AM, PBFrance wrote:
Hello I'm fairly new to R. I have a script which produces a 1-column vector (numeric). I can write it to a text file using the write command. What I want to do is to run the script a number of times on different input files, producing a different 1-column vector each time and save all the vectors to a text file so that each vector is one separate column in the text file. I had thought of
append # the obvious parameter to look for
ing each new vector as a new column in the unique text file, but I don't know if this is possible.
If you have further questions after reading these help files and setting, append=TRUE, you should offer an example: ?write.table ?cat
At the moment, it looks like I will have to create a separate text file each time I run the script.
David Winsemius, MD West Hartford, CT
Collect the results in an object via 'cbind' and then write out the results at the end of the test. You did not mention how large these vectors were. You can 'append' to the end of the file, but you can not add more columns to an existing file without reading it in, 'cbind'ing and the writing it out. So it depends on how large your result will be and if you have to use a relational database if it is going to be several millions of rows. A little more specificity would be good; numbers always make it easier to understand the problem you are trying to solve.
On Fri, Apr 22, 2011 at 8:40 AM, PBFrance <peter.banton at univmed.fr> wrote:
Hello I'm fairly new to R. I have a script which produces a 1-column vector (numeric). I can write it to a text file using the write command. What I want to do is to run the script a number of times on different input files, producing a different 1-column vector each time and save all the vectors to a text file so that each vector is one separate column in the text file. I had thought of appending each new vector as a new column in the unique text file, but I don't know if this is possible. At the moment, it looks like I will have to create a separate text file each time I run the script. -- View this message in context: http://r.789695.n4.nabble.com/writing-appending-a-text-file-tp3467882p3467882.html Sent from the R help mailing list archive at Nabble.com.
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