On Thu, 17 Dec 2015, Andreas Leha wrote:
Hi all,
I think there is a bug in the handling of results of R src blocks. What
is the suggested way to make an R block return a link to a file? The
obvious way appends a newline character to the file link (which is
broken because of that).
Here is an example:
--8<---------------cut here---------------start------------->8---
#+NAME: TESTSRC
#+BEGIN_SRC R :results file
a <- file.path("junk", "test.org")
a
#+END_SRC
#+RESULTS: TESTSRC
[[file:junk/test.org
]]
--8<---------------cut here---------------end--------------->8---
That *is* the suggested way, and it will work in (say) emacs-lisp. The
problem for `:results value' (the default) is that a newline is added to
the result by `org-babel-R-evaluate-external-process'.
This *might* be the fix, but I do not have time to check it thoroughly:
diff --git a/lisp/ob-R.el b/lisp/ob-R.el
index f72cd95..f660bbd 100644
--- a/lisp/ob-R.el
+++ b/lisp/ob-R.el
@@ -397,7 +397,7 @@ last statement in BODY, as elisp."
(org-babel-result-cond result-params
(with-temp-buffer
(insert-file-contents tmp-file)
- (buffer-string))
+ (org-babel-chomp (buffer-string) "\n"))
(org-babel-import-elisp-from-file tmp-file '(16)))
column-names-p)))
(output (org-babel-eval org-babel-R-command body))))
In the meanwhile, you can work around by using `:results output' and
wrapping the result in cat().
HTH,
Chuck
