From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric S Fraga <e.fraga@ucl.ac.uk>
Subject: Re: ob-calc duplicate stack-element issue
Date: Sun, 15 Mar 2020 12:06:46 +0000
Message-ID: <87imj5n7op.fsf@ucl.ac.uk>
References: <9eed12f5-face-eb4f-4006-e8ee7890e0a9@webbedtables.de>
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In-Reply-To: <9eed12f5-face-eb4f-4006-e8ee7890e0a9@webbedtables.de> (Heiko
 Schmidt's message of "Sun, 15 Mar 2020 11:46:29 +0100")
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To: Heiko Schmidt <Heiko.Schmidt@webbedtables.de>
Cc: emacs-orgmode@gnu.org

On Sunday, 15 Mar 2020 at 11:46, Heiko Schmidt wrote:
> - I want to use ob-calc to do some "literate calculation" with the
>  =C2=A0 purpose to document what I thought at the time I wrote it.

I have never managed to get ob-calc to do what I want either so I cannot
help you directly with your query.  Instead, I use embedded calc mode,
along these lines:

--8<---------------cut here---------------start------------->8---
Number of cars (PKW) in germany:

ncars :=3D 45000000.

Yearly mileage in [km/y]

mileage :=3D 15000 km/y

Calculate amount of complete km per year

mileage ncars =3D> 675000000000. km / y

--8<---------------cut here---------------end--------------->8---


You have to activate embedded mode.  By default, calc will look for
expressions surrounded by empty lines.  The :=3D operator assigns values
to variables and the =3D> operator says to show the result here instead of
replacing the expression with the result.

As an aside, calc understands units which is quite nice...

HTH,
eric

--=20
: Eric S Fraga via Emacs 28.0.50, Org release_9.3.6-412-ge18415