From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Subject: bug#23890: 25.0.94; Org-mode Table does not copy time interval
 correctly
Date: Wed, 06 Jul 2016 22:34:38 +0200
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To: Rares Vernica <rvernica@gmail.com>
Cc: 23890@debbugs.gnu.org

Hello,

Rares Vernica <rvernica@gmail.com> writes:

> Just to clarify, how would you fix this:
>
> | [2016-07-05 Tue]--[2016-07-06 Wed] | 1d | vsum(d) |
> | [2016-07-06 Wed]--[2016-07-07 Thu] | 1d | 2 d     |
> #+TBLFM: $3=vsum(@1$-1..@0$-1)
>
> Notice the "vsum(d)" instead of the expected "1 d". How would you add
> "identity" here?

You probably need to use Lisp formulas instead of Calc, i.e, wrap the
formula within '(...).

I'm no specialist about table formulas; I suggest to ask on Org mailing
list.

Regards,

-- 
Nicolas Goaziou