Hi, How to get scan(file="") command to ask my input from the keyboard? If I put the command straight to the console it works > X1 <- scan(n=1) 1: 22 Read 1 item but as a part of a program it just continues without asking my value? > X1 <- scan(n=1) 1: Read 0 items Yours, Atte Tenkanen
Getting scan() -command to work during the program run
5 messages · Bert Gunter, Atte Tenkanen, David Winsemius
??
f <- function() {X <- scan(n =1); X}
f()
1: 3 Read 1 item -- Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Tue, Dec 20, 2016 at 12:37 AM, Atte Tenkanen <attenka at utu.fi> wrote:
Hi, How to get scan(file="") command to ask my input from the keyboard? If I put the command straight to the console it works
X1 <- scan(n=1)
1: 22 Read 1 item but as a part of a program it just continues without asking my value?
X1 <- scan(n=1)
1: Read 0 items Yours, Atte Tenkanen
______________________________________________ R-help at 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.
Hi Bert, I tried using the function, but still the same problem. If there is something after the scan-line, scan does not let me to enter any input but the program just run forward like before. I have OSX 10.9.5. and R 3.3.2. Atte 20.12.2016, 17.19, Bert Gunter kirjoitti:
??
f <- function() {X <- scan(n =1); X}
f()
1: 3 Read 1 item -- Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Tue, Dec 20, 2016 at 12:37 AM, Atte Tenkanen <attenka at utu.fi> wrote:
Hi, How to get scan(file="") command to ask my input from the keyboard? If I put the command straight to the console it works
X1 <- scan(n=1)
1: 22 Read 1 item but as a part of a program it just continues without asking my value?
X1 <- scan(n=1)
1: Read 0 items Yours, Atte Tenkanen
______________________________________________ R-help at 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.
Atte Tenkanen, FT MuM Turun Martinseurakunnan kanttori p. 040-3417125
No clue. -- Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Tue, Dec 20, 2016 at 8:11 AM, Atte Tenkanen <attenka at utu.fi> wrote:
Hi Bert, I tried using the function, but still the same problem. If there is something after the scan-line, scan does not let me to enter any input but the program just run forward like before. I have OSX 10.9.5. and R 3.3.2. Atte 20.12.2016, 17.19, Bert Gunter kirjoitti:
??
f <- function() {X <- scan(n =1); X}
f()
1: 3 Read 1 item -- Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Tue, Dec 20, 2016 at 12:37 AM, Atte Tenkanen <attenka at utu.fi> wrote:
Hi, How to get scan(file="") command to ask my input from the keyboard? If I put the command straight to the console it works
X1 <- scan(n=1)
1: 22 Read 1 item but as a part of a program it just continues without asking my value?
X1 <- scan(n=1)
1: Read 0 items Yours, Atte Tenkanen
______________________________________________ R-help at 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.
-- Atte Tenkanen, FT MuM Turun Martinseurakunnan kanttori p. 040-3417125
On Dec 20, 2016, at 12:37 AM, Atte Tenkanen <attenka at utu.fi> wrote: Hi, How to get scan(file="") command to ask my input from the keyboard? If I put the command straight to the console it works
X1 <- scan(n=1)
1: 22 Read 1 item but as a part of a program it just continues without asking my value?
X1 <- scan(n=1)
As "part of a program" there is no console input file when run in non-interactive mode. Efforts to make a non-interactive session into an interactive session are well documented in the rhelp archives. Search: http://markmail.org/search/?q=list%3Aorg.r-project.r-help+user+input+interactive+rscript If you did that inside a function which you ran inside an interactive session and did not return the value there would of course be no value, but that would not give you response you report. You would be expected to use the 'file'-parameter for specifying the source of input when using scan in a script. If my only code is a single line in a text file named 'Untitled.R': X1 <- scan(n=1) Running just that with Rscript at the system console does give me: Read 0 items Now make a data file named 'myfile.txt' and a source file named "Untitled.R" and use it to create a data file named myfile.txt and then read from it. ------ cat("5", "\n", file="myfile.txt") X1 <- scan(file="myfile.txt") X1 ------- The source Untitled.R or run with Rscript.