[PATCH] -for review- Tangling with variable transfer of variables

[Rainer M Krug <Rainer@krugs.de>]

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Hi

This patch should fix the problem of tangling with variable transfer of
tables. It uses a textConection() instead of a file to transfer the
table. This results in variable transfer of variables in R, without
having to include additional files.

Hope this does not work only for me.


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From f77e982e17909f2098974356c304bd29db04da79 Mon Sep 17 00:00:00 2001
From: "Rainer M. Krug" <R.M.Krug@gmail.com>
Date: Thu, 19 Jun 2014 22:03:46 +0200
Subject: [PATCH] lisp/ob-R.el: Fix tangling with tables

* lisp/ob-R.el (org-babel-R-assign-elisp): Fix variable transfer of
  tables by using text connections in R instead of files. Variable
  transfer of tables does not depend on files anymore, i.e. works also
  when tangling.
---
 lisp/ob-R.el | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/lisp/ob-R.el b/lisp/ob-R.el
index a3ae1ec..88f65f3 100644
--- a/lisp/ob-R.el
+++ b/lisp/ob-R.el
@@ -190,25 +190,20 @@ This function is called by `org-babel-execute-src-block'."
   (if (listp value)
       (let* ((lengths (mapcar 'length (org-remove-if-not 'sequencep value)))
 	     (max (if lengths (apply 'max lengths) 0))
-	     (min (if lengths (apply 'min lengths) 0))
-	     (transition-file (org-babel-temp-file "R-import-")))
+	     (min (if lengths (apply 'min lengths) 0)))
         ;; Ensure VALUE has an orgtbl structure (depth of at least 2).
         (unless (listp (car value)) (setq value (list value)))
-        (with-temp-file transition-file
-          (insert
-	   (orgtbl-to-tsv value '(:fmt org-babel-R-quote-tsv-field))
-	   "\n"))
-	(let ((file (org-babel-process-file-name transition-file 'noquote))
+	(let ((file (orgtbl-to-tsv value '(:fmt org-babel-R-quote-tsv-field)))
 	      (header (if (or (eq (nth 1 value) 'hline) colnames-p)
 			  "TRUE" "FALSE"))
 	      (row-names (if rownames-p "1" "NULL")))
 	  (if (= max min)
-	      (format "%s <- read.table(\"%s\",
+	      (format "%s <- read.table(textConnection('%s'),
                       header=%s,
                       row.names=%s,
                       sep=\"\\t\",
                       as.is=TRUE)" name file header row-names)
-	    (format "%s <- read.table(\"%s\",
+	    (format "%s <- read.table(textConnection('%s'),
                    header=%s,
                    row.names=%s,
                    sep=\"\\t\",
-- 
2.0.0


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Cheers,

Rainer


-- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

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