How to Automatically Answer Yes or No in Command Line in R?

Question

I'm to trying to run an r-script from the command line. The script prompts a "1"/"2" input. How can I automate the answer to be 2 via a batch file?

In particular, I have the file "run.R" with the following script within:

require(twitteR)
oauth <- setup_twitter_oauth(cred$consumerKey, cred$consumerSecret, cred$accessToken, cred$accessTokenSecret)
# more code...

When running the above script from the command line - Rscript run.R - the function setup_twitter_oauth prompts the following:

[1] "Using direct authentication"
Use a local file to cache OAuth access credentials between R sessions?
1: Yes
2: No

Selection:

How can I automate the answer to be 2 when running the script from the command line or through a batch file?

Your question is very unclear. What is the use case you need this for? — Paul Hiemstra, Sep 03 '15 at 13:15
Apologies for that. I've edited the question to make it clearer. — Stan, Sep 03 '15 at 13:23
This really depends on how the script was written and how it is run. If the script is using `readline`, the interaction only works when R is run in interactive mode. See `?readline`. In the question you will need to simplify the script down to the essentials for this problem and show how you intend to run it. — G. Grothendieck, Sep 03 '15 at 13:37

adlop · Answer 1 · 2016-05-05T16:03:20.037

1

I think that it can help you!

You should include options(httr_oauth_cache=F) in your run.R file.

I hope this help! (Idea took from @NicE)

edited May 05 '16 at 16:03

answered May 05 '16 at 15:10

adlop

Please do not post links to [duplicate answers](//meta.stackexchange.com/a/211726/206345). Instead, consider other actions that could help future users find the answer they need, as described in the linked post. – Mogsdad May 05 '16 at 15:20

1 Answers1