From: Rasmus <rasmus@gmx.us>
To: emacs-orgmode@gnu.org
Subject: Re: How to do a sum of products in a table?
Date: Fri, 14 Jun 2013 17:13:24 +0200 [thread overview]
Message-ID: <87mwqs7mjv.fsf@pank.home> (raw)
In-Reply-To: m2d2ron5r1.fsf@polytechnique.org
Hi Alan,
> I'm grading an exam, and I'm trying to use org instead of Numbers to
> tabulate the results. For each student, I'll input how well he answered
> to the question, and his grade will be (sum of mark * coefficient),
> where each question has a different coefficient (in Numbers I was using
> the SUMPRODUCT function).
>
> Is there a way to do this in org mode?
Sure, but please provide an example. E.g. is each student a column?
Or is the dotproduct of two vectors where mark is just one
Here's a prtty simple example
| | nr. | score | score |
|---+-----+-----------+-------|
| # | 1 | [1, 2, 3] | 4.2 |
| # | 2 | [3, 4, 5] | 7.8 |
#+TBLFM: $4=$3*[.3, .6, .9]
It would probably be nicer to have the weighting matrix externally
defined. Perhaps you can use #+CONSTANTS or the remote function. If
you prefer you can also let each
A more advance example is given in the manual:
http://orgmode.org/org.html#Advanced-features
|---+---------+--------+--------+--------+-------+------|
| | Student | Prob 1 | Prob 2 | Prob 3 | Total | Note |
|---+---------+--------+--------+--------+-------+------|
| ! | | P1 | P2 | P3 | Tot | |
| # | Maximum | 10 | 15 | 25 | 50 | 10.0 |
| ^ | | m1 | m2 | m3 | mt | |
|---+---------+--------+--------+--------+-------+------|
| # | Peter | 10 | 8 | 23 | 41 | 8.2 |
| # | Sam | 2 | 4 | 3 | 9 | 1.8 |
|---+---------+--------+--------+--------+-------+------|
| | Average | | | | 25.0 | |
| ^ | | | | | at | |
| $ | max=50 | | | | | |
|---+---------+--------+--------+--------+-------+------|
#+TBLFM: $6=vsum($P1..$P3)::$7=10*$Tot/$max;%.1f::$at=vmean(@-II..@-I);%.1f
Refer to
http://orgmode.org/org.html#The-spreadsheet
–Rasmus
--
Hooray!
next prev parent reply other threads:[~2013-06-14 15:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-14 14:09 How to do a sum of products in a table? Alan Schmitt
2013-06-14 15:13 ` Rasmus [this message]
2013-06-14 16:49 ` Alan Schmitt
2013-06-14 17:34 ` Rasmus
2013-06-14 18:53 ` Alan Schmitt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.orgmode.org/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87mwqs7mjv.fsf@pank.home \
--to=rasmus@gmx.us \
--cc=emacs-orgmode@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).