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. > [[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.
