From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephan Schmitt <drmabuse@cs.tu-berlin.de>
Subject: Re: $LR syntax in tables
Date: Wed, 12 Aug 2009 18:45:51 +0200
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To: emacs-orgmode@gnu.org, Andrew Stribblehill <ads@wompom.org>


Stephan wrote:
> 
> Stephan wrote:
>> Andrew wrote:
>>> I'm afraid I can't quite wrap my head around this puzzle. I have a 
>>> little table:
>>>
>>> | Budget       |  640 | 640 |
>>> | Some expense | -165 | 475 |
>>>   #+TBLFM: $3=$LR3+$2
>>>
>>> So col C is supposed to add the previous line's col C to the current
>>> line's col B.
>>>
>>> However, it seems that $LR3 is referring to the _subsequent_ line not
>>> the previous one. Is there a bug or just my misunderstanding?
>>>
>>> Thanks.
>>
>> Hi Andrew,
>>
>> what you need is this:
>>
>> |              |      |   0 |
>> | Budget       |  640 | 640 |
>> | Some expense | -165 | 475 |
>> #+TBLFM: $3=@-1+$2::@1$3=0
>>
>> the LR-reference is for the last, that is, the bottom row.
>>
>> You need the first row and the field formula for C1 in order to 
>> initialize the cumulative sum properly.
>>
>> hth,
>>     Stephan
>>
> 
> p.s.
> another solution would be:
> 
> | Budget       |  640 |  640 |
> | Some expense | -165 | -165 |
> #+TBLFM: $3=@-1+$2::@1$3=@1$2
> 
> Greetings,
>     Stephan
> 

p.p.s.
forgot to say: you must evaluate the formulas twice (C-u C-u C-c C-*)

| Budget       |  640 | 640 |
| Some expense | -165 | 475 |
#+TBLFM: $3=@-1+$2::@1$3=@1$2