Run R Script file with RScript – Example

R Tutorial – We shall learn basic syntax required to write R Script File and execute R Script Example File with Rscript.

R Script File

It is a file with extension “.R” that contains a program (a set of commands). Rscript is the R Interpreter which helps in the sequential execution of R commands in the script file.

R Script File Basic Syntax with Example

Now we shall see a simple R Script that prints “Hello World!” to the console.

Following is a detailed explanation for each line in the above script file.

  1. First line is a comment and a comment in R programming language starts with # (hash) symbol. There are only single line comments supported in R language, though there is a work around for multiple line comments.
  2. Second line is an assignment of value “Hello World!” to the variable aString.
  3. In the third line, we are printing the variable aString which is holding the value “Hello World!”.

Run R Script File

R language provides an R Interpreter. It can invoked using the command Rscript in the terminal. To run an R script file in the Terminal command prompt, following is the syntax :

The syntax remains same for Windows/MacOS/Linux/Ubuntu.

Save the content of example script file provided in the above section to file with name HelloWorld.R. Please observe that the extension of the file is “.R”. Open a Terminal from the location of HelloWorld.R and run the following command in the Terminal.

The script file would get executed and result in the following output.

Conclusion :

In this R Tutorial, we have learnt basic syntax required to write R Script File and execute R Script Example File with R interpreter, Rscript.