From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric S Fraga <e.fraga@ucl.ac.uk>
Subject: Re: Conditional in table formula with times
Date: Mon, 24 Feb 2014 14:32:09 +0000
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In-Reply-To: <871tywlxci.fsf@hornfels.zedat.fu-berlin.de> (Loris Bennett's
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To: Loris Bennett <loris.bennett@fu-berlin.de>
Cc: emacs-orgmode@gnu.org

Hi,

Have you tried the numeric equivalent of your times?  I believe the if
expression is interpreted as returning a number of seconds.  The
following table format line works for me:

#+TBLFM: $4=$3-$2;T::$5=if($4 > 0,29880,0);T::$6=$4-$5;T

HTH,
eric
-- 
: Eric S Fraga (0xFFFCF67D), Emacs 24.3.1, Org release_8.2.5h-585-g5f0ca0