CODEWITHSUNDEEP
windowsrplatform
babu
babu

Reputation: 311

running R from windows command prompt

I have a R program in a txt file say "functions.txt".
I load the "functions.txt" file the R using source("function.txt") and then call functions f1(), f2() etc. which are declared and defined within "function.txt" file.
I also need to load a couple of R libraries using library() before I can use f1(), f2() etc.

My question is can I acheive all this (i.e. calling function f1() and f2()) from the windows prompt without opening the R environment ?

So essentially I want to

  1. load the R libraries I need to run f1(), f2() etc.
  2. load the function.txt file
  3. run the individual functions f1() etc.
  4. record the result

all from from the command promt of windows c:\>

I have windows version of R installed in my computers.
It would be very kind of anyone to give a detailed answer as I am not very computer savvy.

Regards

Upvotes: 26

Views: 70523

Answers (4)

Ali Nehme
Ali Nehme

Reputation: 1

Add the R bin directory to PATH (windows Enviromwntal variables)

  • This PC > Properties > Advanced system settings > Enviromental Variables > select Path > Edit > Add the path to R bin > save

Run command prompt, then you can use either the "R" command to start a new R session in cmd, or "Rscript" to run a script (file)

Upvotes: 0

Bill Yarberry
Bill Yarberry

Reputation: 101

Here's a command line script, based on code above:

d:\misc2\bin\Rscript.exe    d:\r_code\mycode.r

Using Windows 7, I ran it as a .bat file. Works fine. Thanks for the tip. (of course, these are just my particular subdirectories)

Upvotes: 6

Dirk is no longer here
Dirk is no longer here

Reputation: 368181

Bart's post is correct, but this can be done simpler. If the code

f1 <- function() {
  print("A")
}

f2 <- function() {
  print("B")
}

f1()
f2()

is in a file 'myRcode.R'; then

Rscript myRcode.R

will load and execute it, including the two function calls.

Rscript.exe is in the same directory as R.exe -- which one may have to add to the $PATH.

Upvotes: 24

Bart Kiers
Bart Kiers

Reputation: 170138

The following "works on my machine" (not Windows though, but it should...):

If your functions.txt looks like:

f1 <- function()
{
  print("A")
}

f2 <- function()
{
  print("B")
}

the command:

Rscript -e "source('functions.txt');f1();f2()" > out.txt

should create the file out.txt containing:

[1] "A"
[1] "B"

Upvotes: 9

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