From mboxrd@z Thu Jan  1 00:00:00 1970
From: John Hendy <jw.hendy@gmail.com>
Subject: Re: Refresher on including R/ggplot2 output via latex/pdf?
Date: Sun, 27 Oct 2019 23:40:34 -0500
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To: Jack Kamm <jackkamm@gmail.com>
Cc: emacs-orgmode <emacs-orgmode@gnu.org>

On Sun, Oct 27, 2019 at 11:31 PM Jack Kamm <jackkamm@gmail.com> wrote:
>
> Your code block looks fine to me. The typical R code block headers I use is as follows:

Did you try to reproduce my example, by chance?

> :session :results output graphics :file path/to/file.png :exports results :eval never-export

Using this:
-----
#+begin_src R :session :results output graphics :file foo.png :exports
results :eval never-export
library(ggplot2)

df <- data.frame(x=c(1, 2), y=c(2, 4))
p <- ggplot(df, aes(x = x, y = y)) + geom_point()
print(p)
#+end_src
-----

I get an empty #+RESULTS: header, but no inserted file link. The plot
is not in the exported PDF either.

If I make it this:
-----
#+begin_src R :session :results file graphics :file foo.png :exports
results :eval never-export
-----

I get the expected results, and the plot is in the output PDF.
-----
#+RESULTS:
[[file:foo.png]]
-----

> One thing I've noticed, if I have an existing graphics device open, it
> can mess up plots when executing an org-babel cell. Calling dev.off() a
> few times fixes this for me.
>
> Note I pretty much always use R blocks with the :session argument,
> things might be pretty different without it.

I usually use :session as well (and have it in my actual document, but
left it off for this test case). Still, using your header (minus
changing the file path/type) didn't work for me.

Thanks for taking a look,
John