Is there a way to specify org-macros that can be used in header arguments of org-babel? One application is to specify the figure path. For instance I want to define:
#+macro: folder figures_here
in the preamble, and then later,
#+begin_src R :results graphics :file {{{folder}}}/figure1.svg
and so on. This does not seem to work - is there another way such a macro can be specified, or specifically for designating the output directory there is a better way?