[O] :var problems with R

[Neuwirth Erich]

The following works
#+name: xvar
#+begin_src emacs-lisp
ahaRx
#+end_src

#+RESULTS: xvar
: ahaR

#+name: myblock
#+begin_src R :var xxx=xvar
xxx
#+end_src

#+RESULTS: myblock
: ahaRx

But when I replace emacs-lisp with R in the first code block, it does not work 
any more.
I think it should because R also returns the character value in that case.

Any ideas?

Re: [O] :var problems with R

[suvayu ali]

Hi Neuwirth,

On Thu, Jun 21, 2012 at 8:14 AM, Neuwirth Erich
erich.neuwi...@univie.ac.at wrote:
 The following works
 #+name: xvar
 #+begin_src emacs-lisp
 ahaRx
 #+end_src

Why are you not using something that you know works? Try the following
for example.

#+name: xvar
|ahaRx|

#+name: myblock
#+begin_src R :var xxx=xvar
xxx
#+end_src

#+RESULTS: myblock
: ahaRx

As I understand it, Babel can read from tables and lists only.
Actually, to me, reading from a block of text doesn't make much sense
for a source block. What kind of data structure would it represent
(other than a long string of course :-p)?

GL

-- 
Suvayu

Open source is the future. It sets us free.

Re: [O] :var problems with R

[Thomas S. Dye]

Neuwirth Erich erich.neuwi...@univie.ac.at writes:

 The following works
 #+name: xvar
 #+begin_src emacs-lisp
 ahaRx
 #+end_src

 #+RESULTS: xvar
 : ahaR
 #+name: myblock
 #+begin_src R :var xxx=xvar
 xxx
 #+end_src

 #+RESULTS: myblock
 : ahaRx

 But when I replace emacs-lisp with R in the first code block, it does
 not work any more.
 I think it should because R also returns the character value in that case.

 Any ideas?


This works here:

#+name: xvar
#+begin_src R
ahaRx
#+end_src

#+RESULTS: xvar
: ahaRx


#+name: myblock
#+begin_src R :var xxx=xvar
xxx
#+end_src

#+RESULTS: myblock
: ahaRx

You don't say what doesn't work, which makes it difficult to diagnose
what might be going wrong on your end.

All the best,
Tom

-- 
Thomas S. Dye
http://www.tsdye.com

Re: [O] :var problems with R

[Neuwirth Erich]

Meanwhile I learned that

#+name: xvar
: waterfall

#+name: myblock
#+begin_src R :var xxx=xvar
print(xxx)
#+end_src

#+RESULTS: myblock
: waterfall


ans so will

#+name: xvar2
: water

#+name: myblock2
#+begin_src R :var xxx=xvar2
xxx
#+end_src

#+RESULTS: myblock2
: water

The critical missing piece for me was the colon in front of the value in a name 
definition.

I wanted this because I am running a project on different machines, and I want 
to give the
name od subdirectories through this mechanism.
Ir seems cleaner than using code in a programming language when we just need 
constants.


And I explained the problem seems to be that a value returned by R in a named 
block is not accessible
as a named variable.
In this case, I would rather stay with R which I need anyhow and I have to 
explain to my coworkers.
Using emacs-lisp additionally would just make things harder to understand fore 
some of the project members.



This also works now

#+name: rvar
#+begin_src R
raha
#+end_src

#+RESULTS: rvar
: raha

#+name: rvartest
#+begin_src R :var xxx=rvar
xxx
#+end_src


I had misunderstood something there.