From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sebastien Vauban <sva-news-D0wtAvR13HarG/iDocfnWg@public.gmane.org>
Subject: Re: Can't execute the introductory code: take table as input to
 produce mean
Date: Tue, 05 Aug 2014 11:52:48 +0200
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Hello jenia,

> I want to learn babel-mode so I'm going through
> http://orgmode.org/worg/org-contrib/babel/intro.html#source-code-blocks-org.
>
> I'm trying to execute the basic tutorial's script and for some reason can't
> do it.
>
> I'm suppose to feed a table as input to a function. This is the table:
>
>     #+name: tbl-example-data()
>     #+begin_src R
>     runif(n=5, min=0, max=1)
>     #+end_src
>
>     #+RESULTS: tbl-example-data
>     |  0.607781215803698 |
>     |  0.157157169422135 |
>     |  0.675619817571715 |
>     | 0.0488600700628012 |
>     |  0.998780139256269 |
>
> The next function is the function to be executed:
>
>     #+name: R-mean(x)
>     #+begin_src R
>     mean(x)
>     #+end_src
>
> When I try to run it by pressing `C-c C-c`
> I get `variable "x" in block "R-mean" must be assigned a default value`.
>
> How do I run the function R-mean using the vlaues from tbl-example-data?

Add a variable to your code block:

      #+name: R-mean(x)
      #+begin_src R :var x=tbl-example-data
      mean(x)
      #+end_src

Best regards,
  Seb

-- 
Sebastien Vauban