Run R interactively from Rscript

If I understand your question correctly, I was able to achieve this with littler, which I use in lieu of Rscript for scripting tasks that revolve around R. I'm running CentOS 7, and based on the code in your question it looks like you are on a Unix-like machine, so installing littler should not be an issue. For minimal reproducibility, I used the default shiny application and shiny-based Rmarkdown templates provided by RStudio, saving them as testapp (the project / application directory name) and testRMD.rmd, respectively. Then, I have the following scripts:

testapp.r 

#!/usr/bin/env r

shiny::runApp(
  "~/tmp/delete/testapp",
  port = 7088, 
  launch.browser = TRUE,
  host = "127.0.0.1")

testRMD.r 

#!/usr/bin/env r

rmarkdown::run(
  file = "testRMD.rmd",
  dir = "~/tmp/delete",
  shiny_args = list(
    port = 7088,
    launch.browser = TRUE,
    host = "127.0.0.1"))

Set the permissions for these files so they can be executed - 

[nathan@nrussell R]$ chmod +x testapp.r testRMD.r

(chmod +u ... should suffice, but regardless...), and you should be all set to run them from your terminal, etc... 

[nathan@nrussell R]$ ./testapp.r
Loading required package: shiny

Listening on http://127.0.0.1:7088

enter image description here

[nathan@nrussell R]$ ./testRMD.r
Loading required package: shiny

Listening on http://127.0.0.1:7088

enter image description here

There is some additional command line output for the Rmd file that I omitted, but I'm sure this could be suppressed easily if desired. Anyhow, this seems to be working properly - both the shiny application and Rmarkdown application are interactive, just as when launched from RStudio - but if you had something else in mind please clarify.

Tags:

R

R Markdown

Shiny

Rscript

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