[R] R scripts and parameters

[Gabor Grothendieck]

Try this:

A <- 1
B <- 2
C <- 3
source("myfile.R")

Now the code in myfile can access A, B and C.

On Tue, Feb 17, 2009 at 10:55 AM,  <mauede at alice.it> wrote:
> A couple of weeks ago I asked how it is possible to run an R script (not a function) passing some parameters.
> Someone suggested the function "commandArgs()".
> I read the on-line help and found no clarifying example. Therefore I do not know how to use it appropriately.
> I noticed this function returns the pathname of the R executable which is not what I need.
>
> I meant to ask if it is possible to open an R session and launch a script passing parameters that the script can retrieve and use itself.
> Just like in C I can run a program and call it with  some arguments
>
>> Example_Prog A B C
>
> The program "Example_Prog" can acess its own arguments through the data structures "argc" an "argv".
>
> How can I launch an R script simulating the above mechanism ?
> Shall I use source ("script-name") ?
> Where are the arguments to be passed, as part of the source call ?
> Is the function "commandArgs" to be places as one of the first code lines of the script in order to access its own arguments ?
> Is there any "commandArgs" usage example ?
>
> Thank you very much in advance.
> Maura
>
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> tutti i telefonini TIM!
>
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