Re: [babel] problem with colnames

[Eric Schulte <eric.schulte@gmx.com>]

Andreas Leha <andreas.leha@med.uni-goettingen.de> writes:

> Hi all,
>
> I have a question regarding colnames in babel source blocks.
>
> Suppose, I have a source block (in R) that has as input a table and returns a
> table.  And I would like to have the resulting table with column
> names, but the input table does not have column names.
>
> How can I achieve this?
>
>
> Here is an example:
>
> The input table
>
> #+name: intab
> | bla |
> | blu |
>
>
> By default, the colnames are stripped off the result:
>
> #+begin_src R :var intab=intab
>   colnames(intab) <- "rara"
>   
>   intab
> #+end_src
>
> #+results:
> | bla |
> | blu |
>
>
> The same happens when setting :colnames no
>
> #+begin_src R :var intab=intab :colnames no
>   colnames(intab) <- "rara"
>   
>   intab
> #+end_src
>
> #+results:
> | bla |
> | blu |
>
>
> Setting :colnames yes strips the first row from the input:
>
> #+begin_src R :var intab=intab :colnames yes
>   colnames(intab) <- "rara"
>   
>   intab
> #+end_src
>
> #+results:
> | rara |
> |------|
> | blu  |
>
>
> Finally, setting :colnames nil also strips the first row from the input:
>
> #+begin_src R :var intab=intab :colnames nil
>   colnames(intab) <- "rara"
>   
>   intab
> #+end_src
>
> #+results:
> | rara |
> |------|
> | blu  |
>
>
> Regards,
> Andreas
>
>

It almost seems like there should be two columnames options, one for
input and one for output.  This would add complexity but would make use
cases like yours above feasible.

Does this sound reasonable?

Best,

-- 
Eric Schulte
http://cs.unm.edu/~eschulte/