I wonder if it is possible to use the macro option (#+MACRO:) to save the typing of header options (of code blocks). For example, currently it does NOT work if I try to use

#+MACRO: p  :file $1.png :width 1000 :height 800

to shorten the header of a code block to

#+begin_src R {{{p(plot)}}}

Anyway, I found Org-Babel Mode to be a great tool since Sweave for writing R literate program document. I wrote a how-to article on its use (see attached file "how-to-use-*.html", other files are raw and support files). Hopefully it can be useful to some users.

Sincerely,
Feiming Chen