I am not an expert on Rscript, but I don't think that an actual terminal is ever used when using Rscript. And `interactive()` will probably always be false.
So if you want the script to pause for input, you need to have some form of user interface to work with. One option is to use the tcltk package (this works on all OS's to my knowledge, but not if you are accessing the computer remotely). This answer on stack overflow shows some code that may help: https://stackoverflow.com/questions/16847621/get-data-out-of-a-tcltk-function/16847918#16847918 On Thu, Apr 18, 2019 at 8:11 AM Luigi Marongiu <marongiu.lu...@gmail.com> wrote: > > Dear all, > I am trying to write an interactive script where the user type some > input from the terminal. I used readline() but when I launch the file > with Rscript, the function is overwritten directly, there is no > waiting for the user's input. For instance, this example: > > VAR1 = as.numeric(readline(prompt = "Enter something -> ")) > VAR2 = as.numeric(readline(prompt = "Enter something else -> ")) > if(is.na(VAR1)) VAR1 = 0 > if(is.na(VAR2)) VAR2 = "empty" > cat("Input was: ", VAR1, " - ", VAR2, "\n") > > is executed till the end without typing anything on terminal : > > $ Rscript test.R > Enter something -> > Enter something else -> > Input was: 0 - empty > > I also tried with ',1' at the end of readline, but the effect is the > same. I should use the interactive() function but I am confused on its > use. > It is possible to launch R scritps in the interactive mode in the > first place? and if yes, how? Or would python or julia be better > choices in this case? > Thank you. > -- > Best regards, > Luigi > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. -- Gregory (Greg) L. Snow Ph.D. 538...@gmail.com ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
