[Orgmode] Re: Babel: help with tables and code blocks?

[Dan Davison]

Bart Bunting <address@hidden> writes:

> Hi everyone,
>
> I'm trying to get my head around babel and getting info back into a
> table.
>
> The below org file tracks expenses and the perl code simply sums them
> up.
>
> The code is working but I now want to get the total back into another table.  
> What I have is not
> working can someone tell me what I'm doing wrong here?
>
> Cheers
>
> Bart
>
> * Expenses
>
> #+tblname: expenses
> |------------+-----------------------------------+--------|
> |       Date | What                              | Amount |
> |------------+-----------------------------------+--------|
> | 2010-07-26 | Breakfast                         |      5 |
> | 2010-07-26 | groceries                         |    8.5 |
> | 2010-07-26 | butchers - chicken                |    5.5 |
> | 2010-07-27 | umart - video card, kvm, speakers |    136 |
>
> * Code
>
> #+srcname: totals 
> #+begin_src perl  :var details=expenses[1:-1]
>   my $total = 0;
>   foreach my $row  (@$details) {
>       $total += @$row[2];
>   }
>   
> return $total;
> #+end_src
>
> #+results: totals
> : 155
>
>
>
> * Totals
>
> | Total | #ERROR |
>   #+TBLFM: $2=#+call: totals(details=expenses)

Hi Bart,

You've mixed up #+call and sbe there. sbe is what you want to use in a
table formula; #+call and #+lob are for standalone lines. Here are a few
examples of different ways to do what you're doing. Hopefully they make
things clear.

Dan

--8<---------------cut here---------------start------------->8---

* Totals
** Using a table formula

*** Relying on default argument to totals block
| Total | 155 |
#+TBLFM: $2='(sbe "totals")

*** Providing argument explicitly

The dots are a bug. We'll fix it.

**** version 1
| Total | 155... |
#+TBLFM: $2='(sbe "totals(details=expenses[1:-1])")

**** version 2
| Total | 155... |
#+TBLFM: $2='(sbe "totals" (details "expenses[1:-1]"))


** Using call/lob

#+call and #+lob are synonyms

*** Relying on default argument to totals block

#+call: totals()

#+results: totals()
: 155

or equivalently (it outputs into the same results block):

#+lob: totals()

*** Providing argument explicitly
#+call: totals(details=expenses[1:-1])

#+results: totals(details=expenses[1:-1])
: 155

--8<---------------cut here---------------end--------------->8---




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