[R] run R under DOS prompt

[Duncan Murdoch]

On Tue, 13 Feb 2001 15:27:22 -0800 (PST), you wrote:

>Hi,
>
>I have a xxx.R file. In order to run this file, I have
>to go to R, and type -- source("xxx.R").
>
>Two questions:
>1. How to run file xxx.R under DOS prompt instead of
>entering R environment?

Try 

 Rterm --slave <xxx.R

Look in the R-intro manual for options other than --slave that you
might want to use.

>2. There are several functions in file xxx.R, how to
>pass the arguments
>to the function when I try to run this file via
>source() function (or under DOS mode)?

You can't, but you can add extra lines to the file with calls
containing the arguments.  For example, you might have

 myfunc <- function(x)
 { 
	print(x)
 }

in xxx.R.  If you want to call myfunc(34), then first source the file,
then execute myfunc(34).  If doing it in batch mode, copy the file to
a temp file, add the line "myfunc(34)" to the end, and execute the
temp file.

Duncan Murdoch

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