Run R script from command line

Question

I have a file  called a r  it has a chmod of 755   sayHello  lt - function       print  hello      sayHello     How can I run this via command-line

User · Answer

How to run Rmd in command with knitr and rmarkdown by multiple commands and then Upload an HTML file to RPubs

Here is a example: load two libraries and run a R command

R -e 'library("rmarkdown");library("knitr");rmarkdown::render("NormalDevconJuly.Rmd")'

R -e 'library("markdown");rpubsUpload("normalDev","NormalDevconJuly.html")'

User · Answer

One more way of running an R script from the command line would be   R  lt  scriptName R --no-save     or with --save   See also What  39 s the best way to use R scripts on the command line  terminal

User · Answer

You need the  Rscript command to run an R script from the terminal   Check out http   stat ethz ch R-manual R-devel library utils html Rscript html   Example     example    script for a Unix-alike      path to Rscript --vanilla --default-packages utils args  lt - commandArgs TRUE  res  lt - try install packages args   if inherits res   try-error    q status 1  else q

User · Answer

If you want the output to print to the terminal it is best to use Rscript  Rscript a R   Note that when using R CMD BATCH a R that instead of redirecting output to standard out and displaying on the terminal a new file called a Rout will be created   R CMD BATCH a R   Check the output cat a Rout   One other thing to note about using Rscript is that it doesn t load the methods package by default which can cause confusion  So if you re relying on anything that methods provides you ll want to load it explicitly in your script   If you really want to use the   a R way of calling the script you could add an appropriate    to the top of the script     usr bin env Rscript sayHello  lt - function       print  hello      sayHello     I will also note that if you re running on a  unix system there is the useful littler package which provides easy command line piping to R  It may be necessary to use littler to run shiny apps via a script  Further details can be found in this question

User · Answer

Just for documentation  sometimes you need to run the script as sudo   sudo Rscript path to your file R

User · Answer

This does not answer the question directly  But someone may end up here because they want to run a oneliner of R from the terminal  For example  if you just want to install some missing packages and quit  this oneliner can be very convenient  I use it a lot when I suddenly find out that I miss some packages  and I want to install them to where I want     To install to the default location   R -e  install packages c  package1    package2      To install to a location that requires root privileges   R -e  install packages c  package1    package2    lib   usr local lib R site-library

User · Answer

Yet another way to use Rscript for  Unix systems is Process Substitution   Rscript  lt  zcat a r     1   hello    Which obviously does the same as the accepted answer  but this allows you to manipulate and run your file without saving it the power of the command line  e g     Rscript  lt  sed s hello bye  a r     1   bye    Similar to Rscript -e  Rcode  it also allows to run without saving into a file  So it could be used in conjunction with scripts that generate R-code  e g    Rscript  lt  echo  head iris 2      Sepal Length Sepal Width Petal Length Petal Width Species   1          5 1         3 5          1 4         0 2  setosa   2          4 9         3 0          1 4         0 2  setosa

[r] Run R script from command line

Examples related to r

Examples related to command-line