Re: reference to same row in spreadsheet

From: Stephan Schmitt <drmabuse@cs.tu-berlin.de>
To: Carsten Dominik <dominik@science.uva.nl>
Cc: emacs-orgmode@gnu.org
Subject: Re: reference to same row in spreadsheet
Date: Thu, 18 Dec 2008 17:50:58 +0100	[thread overview]
Message-ID: <494A7F72.1000700@cs.tu-berlin.de> (raw)
In-Reply-To: <D72050B6-53AA-44DD-A4D3-3EF12C293BBA@uva.nl>

For me the new behaviour is fine, if leaving out the row specification works.

The distinction between @0 and @+0 would work, too, but is rather confusing and
hard to remember.  I think both should represent either the last or the current row.

Greetings,
	Stephan

Carsten Dominik wrote:
> You are right, this is an incompatible change.  Dammit.
> 
> What should  do?  Opinions?
> 
> The problem is that this change may lead to older tables
> evaluated incorrectly.  I do like the new convention and
> think that @+0 or leaving out the row  specifications are
> good alternatives - but maybe we are obliged to keep
> the old convention....
> 
> - Carsten
> 
> On Dec 18, 2008, at 4:01 PM, Stephan Schmitt wrote:
> 
>> Hello,
>>
>> the reference to the last row @0 led to incompatible changes:
>>
>> * spreadsheet: relative reference to same row
>>  (using Org mode version 6.15d)
>>
>>  The Org mode version 6.15 introduced @0 as a reference to the last
>>  row for spreadsheet (org-table) formulas.  This leads to problems if
>>  you used it as reference to the same row before.
>>
>>  - description from [[http://orgmode.org/Changes.html][Org-mode list of
>> user-visible changes]]:
>>
>>    Spreadsheet references to the last table line.
>>
>>    You may now use @0 to reference the last dataline in a table in a
>>    stable way.
>>
>>  - according to  [[info:org:References]]:
>>
>>    `0' refers to the current row and column.  Also, if you omit
>>    either the column or the row part of the reference, the current
>>    row/column is implied.
>>
>>  However this doesn't work since @0 refers to the last line.
>>
>>  If you press `C-c *' with the cursor inside the tables below, the
>>  second column should contain the doubled value of the first.
>>
>> ** @0 refers to last line
>>
>> |---+---|
>> | 1 | 4 |
>> | 2 | 4 |
>> |---+---|
>> #+TBLFM: $2=2*@0$-1
>>
>>   this has worked before as reference to the same row, now it refers
>>   to the last row
>>
>> ** bug: omitting explicit reference
>>
>> |---+--------|
>> | 1 | #ERROR |
>> | 2 | #ERROR |
>> |---+--------|
>> #+TBLFM: $2=2*$-1
>>
>>   this seems to be a bug, should refer to the same row
>>
>> ** @+0 refers to same row
>>
>> |---+---|
>> | 1 | 2 |
>> | 2 | 4 |
>> |---+---|
>> #+TBLFM: $2=2*@+0$-1
>>
>>   works as expected
>>
>>
>> Greetings,
>>     Stephan
>>
>>
>>
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> 