Michael Brand <michael.ch.br...@gmail.com> writes: > Hi Eric > > This answers only one of your questions: > > On Tue, Dec 16, 2014 at 5:21 AM, Eric Abrahamsen > <e...@ericabrahamsen.net> wrote: >> #+BEGIN_SRC emacs-lisp >> (defmath uconvert (expr target-units) >> (math-convert-units expr target-units)) >> #+END_SRC > > I would prefer > > #+BEGIN_SRC emacs-lisp > (defmath uconv (expr target-units &optional pure) > (math-convert-units expr target-units pure)) > #+END_SRC > > >> | km | ft | >> |-------+---------------------| >> | 2.5km | uconvert(2.5 km ft) | >> #+TBLFM: $2=uconvert($1 ft) > > Calc syntax uses comma to separate the function arguments, see > examples in e. g. > http://orgmode.org/manual/Formula-syntax-for-Calc.html
I was hoping I'd made a more interesting mistake than that! Thanks for clearing that up. > | km | ft | > |--------+--------------| > | 2.5 km | 8202.0997 ft | > > #+TBLFM: $2 = uconv($1, ft) > > Btw, to have the units only in the column header: > > | km | ft | > |-----+-----------| > | 2.5 | 8202.0997 | > > #+TBLFM: $2 = uconv($1 * @<$1, @<$2, t) > > The same without a user's defmath: > > | km | ft | > |-----+-----------| > | 2.5 | 8202.0997 | > > #+TBLFM: $2 = usimplify($1 * @<$1 / @<$2) Wow, interesting stuff. I had no idea... I'd still like to provide a small patch to the documentation, alerting users to the fact that units work out of the box. Does anyone have any opinions on including a defmath for `math-convert-units'? (The 'pure variant seems like a fine choice.) Lastly, is there a way to both use output formatting, and retain the unit name (if desired)? Right now I get this: | km | units | conversion | |-------+-------+------------| | 2.5km | ft | 8202.10 | #+TBLFM: $3=uconvert($1, $2); %.2f Ie, the "ft" falls off the results when I add the "%.2f". Is it possible to retain that and have formatting? Eric
