[O] [babel] disable :session for a code block?

[Rainer M Krug]

Hi

I would like to save all in org defined variables into an R data
file. In general this works fine with the following code block:


#+begin_src R :session null :results output
dir.create("./data/", showWarnings=FALSE)
save.image("./data/orgData.rda")
#+end_src

but, as I have defined a file wide session for R via 

#+PROPERTY: session *R_MOBILIS*

I have to create a new session for this, which is not that nice: when I
remove a variable in org, it is still in the R environment and will
therefore be saved. Therefore my question:

what can I provide to the :session header, so that no session is used?
In other words: how can I run a single code block out-of-session when
all other are running in a session?

Thanks,

Rainer

-- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, 
UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

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