Hello Org, for some engineering most often I need estimations with unit conversions, Emacs Calc is perfect for this.
When it comes to reporting and documentation I'd like to do it with org-mode, of course. For numerical stuff and visualisation purposes I'm using already R and TikZ. But for unit conversions and symbolic maths I'm in a bind when trying to do this with free programs. - R :: Do you have experience with a units packages under the R-project? What I've seen so far is not so reassuring... - Maxima :: I think there is a nice and intuitive units package for maxima. But this would mean learning an additional tool and mentally switching between both within one document. - Calc :: I'd prefer to do it with Calc but the Babel interface is (yet?) restricted For example, I can define functions and do some unit conversions: #+BEGIN_SRC emacs-lisp (defmath cvun(a b) (math-convert-units a b)) #+END_SRC #+RESULTS: : calcFunc-cvun #+BEGIN_SRC calc :var L1 = "5 mm" cvun( L1, m) #+END_SRC #+RESULTS: : 5e-3 m But what is missing is to assign variables within a source block #+BEGIN_SRC calc :var L1 = "5 mm" L2 := cvun( L1, m) #+END_SRC Unfortunately this is not working. Do you have an idea how to implement this? - Are you using (better) alternatives? Thanks for your insights Dieter -- Best wishes H. Dieter Wilhelm Darmstadt, Germany