He wants to prepend, not append. On 22 October 2014 11:04, Henrik Bengtsson <h...@biostat.ucsf.edu> wrote: > You can! Open a file connection and write to that. Whatever write commands > you use will append to the output. Don't forget to close the connection at > the end. See ?file > > Henrik > > On Oct 22, 2014 12:33 AM, "Sven E. Templer" <sven.temp...@gmail.com> wrote: >> >> Hi. >> >> You can't. >> >> But using a second file where you first write your header and then >> append the original file is a solution. ?cat and ?write.table with a >> focus on the 'append' argument should help. you can then use ?unlink >> to delete the original file and ?file.rename to rename the second, if >> desired. >> >> Best, Sven. >> >> On 22 October 2014 02:32, YIHSU CHEN <yih...@gmail.com> wrote: >> > Hi guys; >> > >> > I want to write some text at the first line of an output file. The >> > output >> > file will be used for other software. In particular, the following text >> > "ampl.tab 2 1" needs to be added to the first line of an df output >> > file. >> > As a hypothetic example, the output in text file should be like: >> > >> > ampl.tab 2 1 >> > A B >> > 2 3 >> > 4 6 >> > 2 0 >> > >> > Thanks for help. >> > >> > Yihsu >> > >> > [[alternative HTML version deleted]] >> > >> > ______________________________________________ >> > 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-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-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.
