Andreas Leha <andreas.leha@med.uni-goettingen.de> writes:

> Hi all,
>
> I am having troubles in using the header argument :units which is
> implemented for R source blocks.  Example:
>
> #+begin_src R :results graphics :file wideplot.png :width 14 :height 7 :units "cm"
>   plot(1:10, 1:10)
> #+end_src
>
>
> This expands to
>
> : png(filename="wideplot.png",height=7,units=cm,width=14)
> : plot(1:10, 1:10)
> : dev.off()
>
> and leads -- when evaluated -- to the error
>
> : Fehler in match.arg(units, c("in", "px", "cm", "mm")) : 
> :   'arg' must be NULL or a character vector
>
> I guess this is a bug, correct?  Otherwise, how do I correctly use
> this header argument?
>
> Regards,
> Andreas
>
>
>

Aloha all,

The attached patch handles quoted string values for R device header
arguments.  With the patch the following works as expected:

#+header: :width 100 :height 100 :units "mm" :res 120
#+BEGIN_SRC R :results graphics :file "test.png"
x <- c(1,2,3,4,5)
y <- x
plot(x,y)
#+END_SRC

All the best,
Tom