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From: Nick Dokos <ndokos@gmail.com>
To: emacs-orgmode@gnu.org
Subject: Re: Calculate differences of remote table numbers
Date: Mon, 01 Oct 2018 12:36:12 -0400	[thread overview]
Message-ID: <87d0st1v5v.fsf@alphaville.usersys.redhat.com> (raw)
In-Reply-To: 2018-10-01T16-59-13@devnull.Karl-Voit.at

Karl Voit <devnull@Karl-Voit.at> writes:

> Hi!
>
> I'd like to calculate the differences between rows of numbers of a
> different table.
>
> Here is a minimal example showing the issue:
>
>     #+NAME: my-table
>     | Numbers |
>
>     |---------|
>     |       1 |
>     |       5 |
>     |       8 |
>     |      12 |
>     |      15 |
>
> This is what I expected: "exp. Reference1" and "exp. Reference2" is here only
> to demonstrate that the assumed references are wrong in the third table. "exp.
> Difference" is the column I want to get in the first place. I don't want to see
> Reference 1 or 2 at all in my solution (since I need a couple of those
> difference-columns).
>
>     | Line | exp. Reference1 | exp. Reference2 | exp. Difference |
>     |------+-----------------+-----------------+-----------------|
>     |    1 |               0 |               0 |               0 |
>     |    2 |               5 |               1 |               4 |
>     |    3 |               8 |               5 |               3 |
>     |    4 |              12 |               8 |               4 |
>     |    5 |              15 |              12 |               3 |
>
> This is what I get instead:
>
>     | Line | actual Reference1 | actual Reference2 | Difference |
>     |------+-------------------+-------------------+------------|
>     |    1 |                 0 |                 0 |          0 |
>     |    2 |                 6 |                 1 |          5 |
>     |    3 |                12 |                 1 |         11 |
>     |    4 |                20 |                 1 |         19 |
>     |    5 |                30 |                 1 |         29 |
>
>     #+TBLFM: $2=if(2 == @#, 0, remote(my-table,@#$1))::$3=if(2 == @#, 0, remote(my-table,@#-1$1))::$4=if(2 == @#, 0, (remote(my-table,@#$1)-remote(my-table,@#-1$1)))

@# is the row number, so to refer to that row, you need @@#. Something like this,
although I didn't test to see if everything gets parsed correctly:

#+TBLFM: $2=if(2 == @#, 0, remote(my-table,@@#$1))::$3=if(2 == @#, 0, remote(my-table,@@#-1$1))::$4=if(2 == @#, 0, (remote(my-table,@@#$1)-remote(my-table,@@#-1$1)))

Turning on formula debugging with `C-c {' helps.

-- 
Nick

"There are only two hard problems in computer science: cache
invalidation, naming things, and off-by-one errors." -Martin Fowler

  reply	other threads:[~2018-10-01 16:36 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-01 15:01 Calculate differences of remote table numbers Karl Voit
2018-10-01 16:36 ` Nick Dokos [this message]
2018-10-04  7:25   ` Karl Voit
2018-10-04 16:37     ` Nick Dokos
2018-10-05 17:46 ` Michael Brand
2018-10-08 15:19   ` Karl Voit
2018-10-08 15:50     ` Eric S Fraga
2018-10-08 16:16       ` Complexity of using spreadsheet functionality (was: Calculate differences of remote table numbers) Karl Voit
2018-10-09  5:34         ` Complexity of using spreadsheet functionality Eric S Fraga
2018-10-12 21:48         ` Complexity of using spreadsheet functionality (was: Calculate differences of remote table numbers) Samuel Wales

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