#+TITLE:test
#+BABEL: :session *R* :results output graphics :exports both 

#+source: plot1
#+begin_src R :file a1.png :width 500 :height 500
  a <- b <- 1:10
  plot(a, b)
#+end_src

#+ATTR_LaTeX: width=500px
#+results: plot1
[[file:a1.png]]

#+source: plot2
#+begin_src R :file a2.png :width 1000 :height 1000
  plot(a, b)
#+end_src

#+ATTR_LaTeX: width=100px
#+results: plot2
[[file:a2.png]]

#+source: plot3
#+begin_src R :file a3.pdf :width 5 :height 5
  a <- b <- 1:10
  plot(a, b)
#+end_src

#+ATTR_LaTeX: width=5px
#+results: plot3
[[file:a3.pdf]]

#+source: plot4
#+begin_src R :file a4.pdf :width 10 :height 10
  plot(a, b)
#+end_src

#+ATTR_LaTeX: width=10
#+results: plot4
[[file:a4.pdf]]