From: Gunnar Wolf <gwolf@gwolf.org>
To: emacs-orgmode@gnu.org
Subject: Tables for attendance lists - A problem understanding TBLFM?
Date: Mon, 8 Apr 2013 18:57:53 -0500 [thread overview]
Message-ID: <20130408235753.GC109669@gwolf.org> (raw)
Hi,
As mostly everything for my class work is handled through org-mode, I
am trying to use it also for tracking attendance. And it almost works
(given my quite-probably-wrong way to solve it) — Can you help me
pinpoint what am I doing wrong?
In case it's not obvious, I'm a complete Lisp newbie.
My attendance tables look similar to:
#+CAPTION: Attendances for April
|---------+-------------------+---+---+---+---+----+-------|
| Account | Name | 1 | 3 | 5 | 8 | 10 | Total |
|---------+-------------------+---+---+---+---+----+-------|
| 1234 | Cárdenas, Lázaro | X | | X | X | | 3 |
| 5678 | Madero, Francisco | X | X | X | X | | 4 |
| 1544 | Villa, Pancho | | | | | | 1 |
| 0113 | Zapata, Emiliano | | X | X | | | 2 |
|---------+-------------------+---+---+---+---+----+-------|
| Day avg | 2.25 | 2 | 2 | 3 | 2 | 1 | 2.50 |
|---------+-------------------+---+---+---+---+----+-------|
#+tblfm: @2$8..@5$8='(length '($3..$7))::@6$2=vmean($3..$7);%.2f::@6$3..@6$7='(length '(@2..@5))::@6$8=vmean(@2..@5);%.2f
The formula tries to fill all of the numeric values (last row and
column), but has two important bugs. First, the (attempted) logic:
- Last column includes the sum of nonempty cells. I did this by
counting the vector's length — But, as you can see, Pancho Villa
lives up to his rebel's name and has consistently failed to come to
class. Still, his entry shows he attended once.
Digging a bit, I found (via M-:) that while (vconcat "X" nil "X" "X")
yields a three element vector [88 88 88], and (vconcat nil nil nil)
correctly yields an empty vector []. Getting the length of []
correctly gives 0. So, I must be doing something wrong. Can you spot
it?
- This same problem happens of course, getting the daily averages —
We haven't yet reached April 10, but it shows one attendance.
So, is there a way to unb0rk my lists? Org-mode seems to be quite well
equiped for this task, and I'd hate to use other tools if I can stick
to this :)
next reply other threads:[~2013-04-08 23:58 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-08 23:57 Gunnar Wolf [this message]
2013-04-09 0:25 ` Tables for attendance lists - A problem understanding TBLFM? Suvayu Ali
2013-04-09 2:21 ` Gunnar Wolf
2013-04-09 3:31 ` Nick Dokos
2013-04-09 3:34 ` Nick Dokos
2013-04-09 12:40 ` Michael Brand
2013-04-09 14:57 ` Gunnar Wolf
2013-04-09 17:06 ` Bastien
2013-04-11 12:15 ` Michael Brand
2013-04-14 8:04 ` Michael Brand
2013-04-14 10:11 ` Bastien
2013-04-14 11:17 ` Michael Brand
2013-04-14 23:28 ` Bastien
2013-04-09 14:55 ` Gunnar Wolf
2013-04-09 15:10 ` Nick Dokos
2013-04-09 15:31 ` Gunnar Wolf
2013-04-09 15:34 ` Michael Brand
2013-04-09 15:50 ` Michael Brand
2013-04-09 16:03 ` Nick Dokos
2013-04-09 16:13 ` Gunnar Wolf
2013-04-09 12:41 ` Michael Brand
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