Re: [NTG-context] Real number with Lua

[Aditya Mahajan]

On Wed, 19 Apr 2017, Procházka Lukáš Ing. wrote:


Hello,

do you mean this? - It shows EXACTLY 3 digits after the decimal point:


\cldcontext{string.format("\letterpercent.3f", 5.8/1.6)}

\cldcontext{string.format(string.char(37) .. ".3f", 5.8/1.6)}

\startluacode
  context(string.format("%.3f", 5.8/1.6))
\stopluacode


\startluacode context("%0.3f", 5.8/1.6) \stopluacode

is simpler.

Also see: 
http://wiki.contextgarden.net/Programming_in_LuaTeX#Arithmetic_without_using_an_abacus


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Re: [NTG-context] Real number with Lua

[Herbert Voss]

Am 19.04.2017 um 15:25 schrieb Fabrice Couvreur:


I do not know Lua but I'll learn later. How to display only 3 digits
after the decimal point ?


The default is 3 digits


\startluacode
function round(a,dec)
  local dec = dec or 3
  local b = math.pow(10,dec)
  return math.floor(a*b)/b
end
\stopluacode

\starttext
\startlinecorrection[blank]
\startmidaligned
\bTABLE[width=2cm,offset=0.8ex,align={lohi,middle}]
\bTR
\bTD \math{P} \eTD
\bTD \math{m} \eTD
\bTD \math{g_M} \eTD
\eTR
\bTR
\bTD \math{1.6} \eTD
\bTD \math{0.4} \eTD
\bTD \startluacode context(round(1.6/0.4,1))\stopluacode \eTD
\eTR
\bTR
\bTD \math{3.1} \eTD
\bTD \math{0.8} \eTD
\bTD \startluacode context(round(3.1/0.8))\stopluacode \eTD
\eTR
\bTR
\bTD \math{4.3} \eTD
\bTD \math{1.2} \eTD
\bTD \startluacode context(round(4.3/1.2,2)) \stopluacode
\eTD
\eTR
\bTR
\bTD \math{5.8} \eTD
\bTD \math{1.6} \eTD
\bTD \startluacode context(5.8/1.6)\stopluacode \eTD
\eTR
\bTR
\bTD \math{7.5} \eTD
\bTD \math{2} \eTD
\bTD \startluacode context(7.5/2)\stopluacode \eTD
\eTR
\eTABLE
\stopmidaligned
\stoplinecorrection
\stoptext


Herbert

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Re: [NTG-context] Real number with Lua

[Procházka Lukáš Ing .]

Hello,

do you mean this? - It shows EXACTLY 3 digits after the decimal point:


\cldcontext{string.format("\letterpercent.3f", 5.8/1.6)}

\cldcontext{string.format(string.char(37) .. ".3f", 5.8/1.6)}

\startluacode
  context(string.format("%.3f", 5.8/1.6))
\stopluacode


Best regards,

Lukas


On Wed, 19 Apr 2017 15:25:07 +0200, Fabrice Couvreur 
 wrote:


Hello,
I do not know Lua but I'll learn later. How to display only 3 digits after
the decimal point ?
thank you,
Fabrice

\starttext
\startlinecorrection[blank]
  \startmidaligned
\bTABLE[width=2cm,offset=0.8ex,align={lohi,middle}]
\bTR
\bTD \math{P} \eTD
\bTD \math{m} \eTD
\bTD \math{g_M} \eTD
\eTR
\bTR
\bTD \math{1.6} \eTD
\bTD \math{0.4} \eTD
\bTD \startluacode context(1.6/0.4)\stopluacode \eTD
\eTR
\bTR
\bTD \math{3.1} \eTD
\bTD \math{0.8} \eTD
\bTD \startluacode context(3.1/0.8)\stopluacode \eTD
\eTR
\bTR
\bTD \math{4.3} \eTD
\bTD \math{1.2} \eTD
\bTD \startluacode
context(4.3/1.2)
  \stopluacode
\eTD
\eTR
\bTR
\bTD \math{5.8} \eTD
\bTD \math{1.6} \eTD
\bTD \startluacode context(5.8/1.6)\stopluacode \eTD
\eTR
\bTR
\bTD \math{7.5} \eTD
\bTD \math{2} \eTD
\bTD \startluacode context(7.5/2)\stopluacode \eTD
\eTR
\eTABLE
  \stopmidaligned
\stoplinecorrection
\stoptext




--
Ing. Lukáš Procházka | mailto:l...@pontex.cz
Pontex s. r. o.  | mailto:pon...@pontex.cz | http://www.pontex.cz | 
IDDS:nrpt3sn
Bezová 1658
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Tel: +420 241 096 751 (+420 720 951 172)
Fax: +420 244 461 038

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Re: [NTG-context] Real number with Lua

[Fabrice Couvreur]

2017-04-19 16:04 GMT+02:00 Otared Kavian :

>
> \starttext
> \ctxlua{x = math.floor(10^3*math.pi)/10^3; context(x)}
> \stoptext
>


​Hi Kavian (or Otared ?),
​Thank you very much, it works.
Fabrice
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Re: [NTG-context] Real number with Lua

[Otared Kavian]

Hi Fabrice,

You can use a construction such as:

\starttext
\ctxlua{x = math.floor(10^3*math.pi)/10^3; context(x)}
\stoptext

Best regards: OK

> On 19 Apr 2017, at 15:25, Fabrice Couvreur  
> wrote:
> 
> Hello,
> I do not know Lua but I'll learn later. How to display only 3 digits after 
> the decimal point ?
> thank you,
> Fabrice
> 
> \starttext
> \startlinecorrection[blank]
>   \startmidaligned
> \bTABLE[width=2cm,offset=0.8ex,align={lohi,middle}]
> \bTR
> \bTD \math{P} \eTD
> \bTD \math{m} \eTD
> \bTD \math{g_M} \eTD
> \eTR
> \bTR
> \bTD \math{1.6} \eTD
> \bTD \math{0.4} \eTD
> \bTD \startluacode context(1.6/0.4)\stopluacode \eTD
> \eTR
> \bTR
> \bTD \math{3.1} \eTD
> \bTD \math{0.8} \eTD
> \bTD \startluacode context(3.1/0.8)\stopluacode \eTD
> \eTR
> \bTR
> \bTD \math{4.3} \eTD
> \bTD \math{1.2} \eTD
> \bTD \startluacode 
> context(4.3/1.2)
>   \stopluacode
> \eTD
> \eTR
> \bTR
> \bTD \math{5.8} \eTD
> \bTD \math{1.6} \eTD
> \bTD \startluacode context(5.8/1.6)\stopluacode \eTD
> \eTR
> \bTR
> \bTD \math{7.5} \eTD
> \bTD \math{2} \eTD
> \bTD \startluacode context(7.5/2)\stopluacode \eTD
> \eTR
> \eTABLE
>   \stopmidaligned
> \stoplinecorrection
> \stoptext
> ___
> If your question is of interest to others as well, please add an entry to the 
> Wiki!
> 
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
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[NTG-context] Real number with Lua

[Fabrice Couvreur]

Hello,
I do not know Lua but I'll learn later. How to display only 3 digits after
the decimal point ?
thank you,
Fabrice

\starttext
\startlinecorrection[blank]
  \startmidaligned
\bTABLE[width=2cm,offset=0.8ex,align={lohi,middle}]
\bTR
\bTD \math{P} \eTD
\bTD \math{m} \eTD
\bTD \math{g_M} \eTD
\eTR
\bTR
\bTD \math{1.6} \eTD
\bTD \math{0.4} \eTD
\bTD \startluacode context(1.6/0.4)\stopluacode \eTD
\eTR
\bTR
\bTD \math{3.1} \eTD
\bTD \math{0.8} \eTD
\bTD \startluacode context(3.1/0.8)\stopluacode \eTD
\eTR
\bTR
\bTD \math{4.3} \eTD
\bTD \math{1.2} \eTD
\bTD \startluacode
context(4.3/1.2)
  \stopluacode
\eTD
\eTR
\bTR
\bTD \math{5.8} \eTD
\bTD \math{1.6} \eTD
\bTD \startluacode context(5.8/1.6)\stopluacode \eTD
\eTR
\bTR
\bTD \math{7.5} \eTD
\bTD \math{2} \eTD
\bTD \startluacode context(7.5/2)\stopluacode \eTD
\eTR
\eTABLE
  \stopmidaligned
\stoplinecorrection
\stoptext
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