Re: [babel] #+call-line removes hlines and headings ?

[Marc-Oliver Ihm <marc-oliver.ihm@online.de>]

Hi Eric,

thanx ! That explains very clearly what I have seen, when trying to debug this phaenomenon.
So this behaviour is by design and I can work around :-)

kind regards, Marc



Am 30.01.2012 17:10, schrieb Eric Schulte:
> Marc-Oliver Ihm<marc-oliver.ihm@online.de>  writes:
>
>> Am 29.01.2012 11:42, schrieb Andreas Leha:
>>> :colnames yes
>> Hi Andreas,
>>
>> Thanx, that is definitely a solution !
>>
>> And I agree with you, that its a bit puzzling, that both cases behave differently;
>> the #+call-line should just have the same result as the #+begin_src-line, to which after all
>> it just refers. Beeing able to change the behaviour of the #+call-line
>> with header arguments is
>> of course a good thing, but it should not be necessary here in the first place.
>>
>> However, this would require a patch to the babel-code, which I am
>> currently not able to produce, because I already
>> got lost in debugging this problem :-) And of course I am not sure
>> what would be the side effects of changing this
>> behaviour ...
>>
>> So, thanx again for pointing out this very easy workaround !
>>
>>
>> with kind regards, Marc-Oliver Ihm
>>
>
> To explain the cause (if not rationale) for the current behavior; when
> executing a call line, an ephemeral code block is created at the point
> of the call line.  The result of the called function is passed into this
> ephemeral block, and the output of the block is inserted into the
> buffer.
>
> This is why call lines have *two* possible sets of header arguments, one
> to pass to the original called code block, and one for local effect in
> the ephemeral block.
>
> The reason the colnames header argument is required for the call line
> and not the code block, is because hlines are only stripped when data
> passes *into* a code block as a variable.  In this case the 'hlines are
> stripped when the table passes into the ephemeral code blocks.
>
> Hope the above is more illuminating that confusing,
>