Dear all, I am trying to wrap a *nix shell script around R for a particular purpose, for which I need to get R to execute predetermined commands but retain interactivity and allow user input during their execution. A straight redirection of standard input is therefore not appropriate, and I don't think "littler" is the solution because I don't want to write an independent R script.
What I want is effectively something like what ruby does with the '-e' option: $ ruby -e 'gets' <waits for input from terminal> R seems to accept an '-e' option too, even though I can't see it mentioned in the output from 'R -h', but it doesn't work the same: $ R --slave --vanilla -e 'scan(what=character(0),nlines=1,quiet=T)' character(0) $ The only way I can get this to work is by creating an .Rprofile file containing the commands I want to run, but this is suboptimal for a number of reasons: I have difficulties if an .Rprofile already exists in the working directory, the default packages are not loaded, and the process doesn't quit if stop() is called. I have a vague inkling that this may be achievable with a pseudoterminal (pty) or named pipe, but if anyone knows a simpler route I'd be glad to avoid getting involved in that kind of thing... Many thanks in advance. Jon ______________________________________________ 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.
