Hi I've been stumbling over a simple issue that undoubtedly has an easy solution. I need to have some way for a user to enter some values into a data frame which R will then work on. I know that data entry should ideally be done otherwise and I should use R only for the computation, but R's data manipulation abilities makes it efficient for me to write the entire code in it.
When I ran R line-by-line, I did: ---- > a <- scan (what='character',n=1) 1: abcd Read 1 item > a [1] "abcd" ---- Everything works fine. But if I save the line "a <- scan (what='character', n=1); a" as `test.r' and run the file in command line, I get: ---- $ r --vanilla < test.r > a <- scan(what='character',n=1); a 1: Read 0 items character(0) ---- Now it's not working. I read what others had suggested on earlier threads and tried different functions, including readLines(). In line-by-line, I wrote the same lines as earlier, except using `readLines(con=stdin(),n=1)' instead of `scan(what='character', n=1)'. It worked fine. Yet, when I tried the modified lines (with readLines() instead of scan()) in batch mode, R didn't wait for user input and said `character(0)'. Is there any way to make R stop for the user to enter values when running in batch mode either by changing the way I invoke scan() or readLines() or by using any other function? Thanks in advance -- Kaushik Krishnan (kaushik.s.krish...@gmail.com) ______________________________________________ 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.
