Re: [babel] Evaluating all source blocks in a document?

[Erik Iverson <eriki@ccbr.umn.edu>]

Hello,

>     On Wed, Jun 30, 2010 at 01:35:04PM +0200, Rainer M Krug wrote:
>      > Hi
>      >
>      > I use Org-babel for literate programming in R, but the tangling
>     takes quite
>      > long. Therefore my question: as it is possible to evaluate a
>     single code
>      > block, is it possible to evaluate ALL code blocks i a document?
>     that would
>      > make debugging much easier.
> 
>     M-x org-babel-execute-buffer
> 

C-c C-v C-b should be a shortcut for that in org-mode now, according to 
my reference card.

>  
> Thanks - that  seems to be what I am looking for, but after trying it 
> out, I realized the following: for each block, e new R session is 
> opened. This does not work for literate programming, as different blocks 
> belong to each other, i.e. one block opens a function, the next one 
> closes it. In addition, I want to evaluate the results, i.e. created 
> objects, in R - therefore the session should stay open. So my guess: 
> tangle and debug.
> 
>     OTOH this may not make it easier to debug, the babel error window
>     doesn't list line numbers or blocks where the error occurred. 
> 

Have you tried the :session argument?  It submits the code block to a 
running R session.  I use it for what you're doing with success.  You 
can set it per code block, or buffer-wide, try for example:

#+PROPERTY: session *R*

> 
>     Perhaps that should be a feature request to log what src block or
>     org file
>     line number the errors occurred in.
> 
> 
> That would be nice.
> 
> 
>      > Also: is it possible, to get some kind of automatic headings for
>     the tangled
>      > code blocks? That would make it easier to identify in which code
>     block the
>      > source code in the tangled file comes from.

Try

(setq org-babel-tangle-w-comments t)

and see if that does what you're thinking.  It will give headings for 
the source block, but I don't recall  what information they contain.