From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nick Dokos <nicholas.dokos@hp.com>
Subject: Re: How to Calculate duration time in Table ?
Date: Tue, 21 Jul 2009 15:45:48 -0400
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In-Reply-To: Message from Xin Shi <shixin111@gmail.com> of "Tue,
	21 Jul 2009 15:06:51 EDT."
	<5236d6f90907211206y20951c9dtc711cf71afc520e2@mail.gmail.com>
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To: Xin Shi <shixin111@gmail.com>
Cc: emacs-orgmode <emacs-orgmode@gnu.org>

Xin Shi <shixin111@gmail.com> wrote:

> I have a table in org which stores the date, I'm wondering if there is any
> function to calculate the duration? For example:
> 
> | Start Date |   End Date | Duration |
> |------------+------------+----------|
> | 2004.08.07 | 2005.07.08 |          |
> 
> I tried to use B&-C&, but failed ...
> 

Try the following:

| Start Date |   End Date | Duration |
|------------+------------+----------|
| 2004.08.07 | 2005.07.08 |      335 |
#+TBLFM: $3=(date(<$2>)-date(<$1>))


See this thread:

    http://thread.gmane.org/gmane.emacs.orgmode/7741

as well as this post (which is really a followup on the
above):

    http://article.gmane.org/gmane.emacs.orgmode/7753

The problem that this last article pointed out was solved
in

    http://article.gmane.org/gmane.emacs.orgmode/8001

and Chris Randle's original musings are at

    http://article.gmane.org/gmane.emacs.orgmode/6536/

HTH,
Nick