R help - May 2012 - transfer R objects back to console/command line

Dear R community,


is there any way to invoke R in batch mode, do some calculations and get 
the values of some R variables back into the (bash)shell ? I only 
managed to get some output saved into a text file with:

  R --slave --args 2 2 <test.R>test2.R

test.R contains:

a <- as.numeric(commandArgs()[4])
b <- as.numeric(commandArgs()[5])

c=a*b


Is ther any way to acess the contents of c in the command line after 
running R ?


Cheers
Jannis

Take a look at this SO question:
http://stackoverflow.com/questions/10575005/output-a-boolean-from-an-rscript-into-a-bash-variable

None of the solutions are "Boolean specific" so you should be good
with them (the key is printing and capturing)

Michael

On Wed, May 16, 2012 at 2:36 PM, Jannis <bt_jannis at yahoo.de>
wrote:
> Dear R community,
>
>
> is there any way to invoke R in batch mode, do some calculations and get
the
> values of some R variables back into the (bash)shell ? I only managed to
get
> some output saved into a text file with:
>
> ?R --slave --args 2 2 <test.R>test2.R
>
> test.R contains:
>
> a <- as.numeric(commandArgs()[4])
> b <- as.numeric(commandArgs()[5])
>
> c=a*b
>
>
> Is ther any way to acess the contents of c in the command line after
running
> R ?
>
>
> Cheers
> Jannis
>
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