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* 2 questions on tables
@ 2013-07-15  6:47 Andreas Leha
  2013-07-15  8:41 ` Michael Brand
  0 siblings, 1 reply; 3+ messages in thread
From: Andreas Leha @ 2013-07-15  6:47 UTC (permalink / raw)
  To: emacs-orgmode

Hi all,

I have two questions concerning tables in orgmode:

1. What is the best way to handle missing values?
   I have the problem, that missing values ("") are treated as "0" when they
   appear in a formula.
   Entering ("nil") instead helps a bit, but does not propagate,
   i.e. nil + 1 results in 0.
   Can I do better?
2. What is the best way to drop a column while preserving the number of
   digits displayed?
   I use a simple code block to drop the columns.  But I do not see how
   to prevent orgmode from dropping trailing 0s

Here is an example demonstrating both questions:
--8<---------------cut here---------------start------------->8---
#+TITLE: Drop columns

* Create Some Table with a Missing Value
#+name: mytable
| Item      | Price ($) | Price ($+1) |
|-----------+-----------+-------------|
| Apple     |     10.55 |       11.55 |
| Tomato II |       nil |        0.00 |
| Tomato    |           |        1.00 |
| Pear      |      3.00 |        4.00 |
| Monkey    |    100.55 |      101.55 |
|-----------+-----------+-------------|
| Sum       |     10.55 |      118.10 |
#+TBLFM: $3=$2+1;%.2f::@7$2=vsum(@I..@II);%.2f::@7$3=vsum(@I..@II);%.2f


* Drop a Column
#+name: mysmalltable
#+begin_src emacs-lisp :var input=mytable[,0:1] :exports results
  input
#+end_src

#+results: mysmalltable
| Item   | Price ($) |
|--------+-----------|
| Apple  |     10.55 |
| Tomato |           |
| Pear   |       3.0 |
| Monkey |    100.55 |
--8<---------------cut here---------------end--------------->8---

Regards,
Andreas

^ permalink raw reply	[flat|nested] 3+ messages in thread

• * Re: 2 questions on tables
    2013-07-15  6:47 2 questions on tables Andreas Leha
  @ 2013-07-15  8:41 ` Michael Brand
    2013-07-15  9:12   ` Andreas Leha
    0 siblings, 1 reply; 3+ messages in thread
  From: Michael Brand @ 2013-07-15  8:41 UTC (permalink / raw)
    To: Andreas Leha; +Cc: Org Mode
  
  Hi Andreas
  
  On Mon, Jul 15, 2013 at 8:47 AM, Andreas Leha
  <andreas.leha@med.uni-goettingen.de> wrote:
  > I have two questions concerning tables in orgmode:
  
  I try to answer your first question:
  
  > 1. What is the best way to handle missing values?
  >    I have the problem, that missing values ("") are treated as "0" when they
  >    appear in a formula.
  >    Entering ("nil") instead helps a bit, but does not propagate,
  >    i.e. nil + 1 results in 0.
  >    Can I do better?
  
  Is this what you are looking for?:
  
  | Tomato |      |      |
  | Pear   | 3.00 | 6.00 |
  #+TBLFM: $3 = if("$2" == "nan", string(""), 2 * $2 +.0); E f-2
  
  For "E" see
  http://orgmode.org/org.html#Formula-syntax-for-Calc
  and for "+.0; f-2" see
  http://orgmode.org/worg/org-faq.html#table-float-fraction
  
  Michael
  
  ^ permalink raw reply	[flat|nested] 3+ messages in thread

• • * Re: 2 questions on tables
      2013-07-15  8:41 ` Michael Brand
    @ 2013-07-15  9:12   ` Andreas Leha
      0 siblings, 0 replies; 3+ messages in thread
    From: Andreas Leha @ 2013-07-15  9:12 UTC (permalink / raw)
      To: emacs-orgmode
    
    Hi Michael,
    
    Michael Brand <michael.ch.brand@gmail.com> writes:
    
    > Hi Andreas
    >
    > On Mon, Jul 15, 2013 at 8:47 AM, Andreas Leha
    > <andreas.leha@med.uni-goettingen.de> wrote:
    >> I have two questions concerning tables in orgmode:
    >
    > I try to answer your first question:
    >
    >> 1. What is the best way to handle missing values?
    >>    I have the problem, that missing values ("") are treated as "0" when they
    >>    appear in a formula.
    >>    Entering ("nil") instead helps a bit, but does not propagate,
    >>    i.e. nil + 1 results in 0.
    >>    Can I do better?
    >
    > Is this what you are looking for?:
    >
    > | Tomato |      |      |
    > | Pear   | 3.00 | 6.00 |
    > #+TBLFM: $3 = if("$2" == "nan", string(""), 2 * $2 +.0); E f-2
    >
    > For "E" see
    > http://orgmode.org/org.html#Formula-syntax-for-Calc
    > and for "+.0; f-2" see
    > http://orgmode.org/worg/org-faq.html#table-float-fraction
    >
    > Michael
    
    thanks a lot!  All three comments (the if() statement, the "E" and the
    "f-2") of yours are extremely helpful.
    
    Question one solved.
    
    Cheers,
    Andreas
    
    ^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2013-07-15  9:13 UTC | newest]

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2013-07-15  6:47 2 questions on tables Andreas Leha
2013-07-15  8:41 ` Michael Brand
2013-07-15  9:12   ` Andreas Leha

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