From: Christian Moe <mail@christianmoe.com>
To: Inquisitive Scientist <inquisitive.scientist@gmail.com>
Cc: emacs-orgmode@gnu.org
Subject: Re: questions about table mode and spreadsheets
Date: Tue, 07 Sep 2010 00:44:03 +0200 [thread overview]
Message-ID: <4C856EB3.9060608@christianmoe.com> (raw)
In-Reply-To: <AANLkTi=tOw-ThbhBpFTFA3D6FpARrXRXcs4Cuj6VywMa@mail.gmail.com>
On 9/6/10 3:38 PM, Inquisitive Scientist wrote:
> 2. How do I compute the sum of a column only if a corresponding row
> matches some condition? For example, how do I compute the sum of
> numbers in column a for which the name in column "name" is "bar"? For
> example, I should get 7 for the sum in column a in the table below:
>
> | name | a | b | c |
> |------+---+---+---|
> | foo | 1 | 2 | 3 |
> | bar | 3 | 2 | 1 |
> | bar | 4 | 5 | 6 |
> |------+---+---+---|
Here's one way: Add a new row after the first, as below. Then run C-c
C-c on the formula line:
| name | | a | b | c |
|------+---+---+---+---|
| foo | | 1 | 2 | 3 |
| bar | | 3 | 2 | 1 |
| bar | | 4 | 5 | 6 |
|------+---+---+---+---|
| | | | | |
#+TBLFM: $2='(if (string= $1 "bar") 1 0)::
@5$3=vsum(vmask(@I$2..@II$2,@I..@II))
It does exactly what you asked, but I don't think it will scale well...
Cheers,
Christian
>
> Thanks,
> -I.S.
>
>
>
> _______________________________________________
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--
Christian Moe
E-mail: mail@christianmoe.com
Website: http://christianmoe.com
next prev parent reply other threads:[~2010-09-06 22:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-06 13:38 questions about table mode and spreadsheets Inquisitive Scientist
2010-09-06 22:44 ` Christian Moe [this message]
2010-09-07 0:56 ` Juan
2010-09-07 9:20 ` Christian Moe
2010-09-15 12:08 ` Inquisitive Scientist
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