How to include interactive input in script to be run from the command line

Question

I am trying to write an interactive R script. For example:

try.R:

print(\"Entr some numbers. >\",quote=F)
a = scan(what=double(0))
print a
q()


        

Answer 1

Try this:

cat("What's your name? ")
x <- readLines(file("stdin"),1)
print(x)

Hopefully some variant of that works for you.

Answer 2

What worked for me on Windows with RStudio 0.98.945 and R version 3.1.1 was:

    cat("What's your name? ")
    x <- readLines(con=stdin(),1)
    print(x)

Answer 3

The answer by @Joshua Ulrich is fine for Linux, but hangs under macOS and needs to be terminated using Ctrl-D.

This is a work-around for both Linux and macOS:

#!/usr/bin/env Rscript

print(system("read -p 'Prompt: ' input; echo $input", intern = TRUE))