Code block [[readdata-code]] is an example of such a code block. Note
~:results value silent~ switch used in the ~#+begin_src~ line.
#+BEGIN_SRC org
,#+NAME: readdata-code
,#+BEGIN_SRC R :results value silent
read.data("datafile1.csv",sep=",",header=T)->mydata1
,#+END_SRC
#+END_SRC