Am 14.02.2010 um 13:11 schrieb Peter Münster:
> On Sun, Feb 14 2010, Andreas Harder wrote:
>
>> 1) Is it possible to have a comma as decimal separator?
>>
>> 2) If you look at the above definition, it works fine with +, –, /, but
>> not with *. Is it possible to expand my macro that it will also work with
>> a multiplication or even with the last two examples?
>
> Hello Andreas,
>
> Just a quick hack:
>
> \usemodule[calcmath]
> \startluacode
> sqrt = math.sqrt
> pi = math.pi
> function my_equation(s, r)
> r = tostring(r)
> tex.print(s:gsub("*", "×") .. "=" .. r:gsub("%.", ","))
> end
> \stopluacode
> \def\calculate#1{\calcmath{\ctxlua{my_equation("#1", #1)}}}
> \starttext
> \startlines
> \calculate{1+2}
> \calculate{3/2-1}
> \calculate{3*2}
> \calculate{sqrt(2)}
> \calculate{2*pi}
> \stoplines
> \stoptext
That’s nice! Thank you very much!
I've found an posting on the LuaTeX-mailing-list and incorporated it, so one
have rounded results (I didn't find a way to use "\%.2f"). So, if someone is
interested:
\usemodule[calcmath]
\startluacode
local floor = math.floor
local round = function(n) return floor(1000*n+0.5)/1000 end
sqrt = math.sqrt
pi = math.pi
function my_equation(s, r)
r = round(r)
r = tostring(r)
tex.print(s:gsub("*", "$·$") .. "=" .. r:gsub("%.", ","))
end
\stopluacode
\def\calculate#1{\calcmath{\ctxlua{my_equation("#1", #1)}}}
\starttext
\startlines
\calculate{1+2}
\calculate{3/2-1}
\calculate{3*2}
\calculate{sqrt(2)}
\calculate{2*pi}
\stoplines
\stoptext
Greetings
Andreas
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