On Sunday, 7 Feb 2016 at 16:45, H. Dieter Wilhelm wrote:
>>>> works as well. I'm not sure how you define variables in calc however...
>>>
>
>>> You could write something like src_calc[:var x=3.41]{2*x} :-)
>>
>> Yes but can you save a variable for use in a later expression?
>
> Well, at the moment I don't know another way as defining the calc
> variables on the lisp level:
>
> #+BEGIN_SRC emacs-lisp
> (setq var-foo 9.81
> var-x 3.14
> var-bar ...)
> #+END_SRC
>
> Note: `var-' is a special prefix for the calc variables `foo', `x',
Thanks for this. Very useful to know. Using this, I've created a macro
which will be quite useful for me in preparing some lecture notes with
simple calculations for illustration:
#+begin_src org
,#+macro: calculate $2 \leftarrow src_calc[:exports code]{$1} =
src_emacs-lisp{(setq var-$2 (string-to-number (calc-eval "evalv($1)")))}
An example:
{{{calculate(x+y,z)}}}
#+end_src
--
: Eric S Fraga (0xFFFCF67D), Emacs 25.0.90.1, Org release_8.3.3-535-g7213aa
