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[O] [babel] calc var floating point number error


From: Giovanni Ridolfi
Subject: [O] [babel] calc var floating point number error
Date: Fri, 20 Jul 2012 14:55:53 +0100 (BST)

Hello everyone,

GNU Emacs 24.1.1 (i386-mingw-nt6.1.7601) of 2012-06-10 on MARVIN
Org-mode version 7.8.11 (eed478ffa @ 


I have a problem with babel and calc.

I am not able to pass (as variable) floating point numbers. 

this example works:

#+BEGIN_SRC calc :var thi=20 :var tha=90 :var a=10 :var rho=7854 :var cp=434 
:var r=5
 tha -  (tha - thi) * exp((-3.0*a)/(rho*cp*r))
#+END_SRC

#+RESULTS:
: 20.0001232163


However var "r" should be 0.05, but if I use such floating point number I got 
an error:


#+NAME sphere
#+BEGIN_SRC calc :var thi=20 :var tha=90 :var a=10 :var rho=7854 :var cp=434 
:var r=0.05
 tha -  (tha - thi) * exp((-3.0*a)/(rho*cp*r))
#+END_SRC

#+RESULTS:
| 19 | Expected a number |

This behaviour has been reported also in SO

http://stackoverflow.com/questions/9559221/simple-math-results-in-an-emacs-org-mode-file-with-babel


cheers,
Giovanni




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