* Formatting numbers in LuaTeX
@ 2010-02-14 10:42 Andreas Harder
2010-02-14 11:37 ` luigi scarso
2010-02-14 12:11 ` Peter Münster
0 siblings, 2 replies; 9+ messages in thread
From: Andreas Harder @ 2010-02-14 10:42 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hi all!
I played a little bit with LuaTeX in ConTeXt and two questions have arisen.
\usemodule[calcmath]
\starttext
\def\calculate#1{\calcmath{#1=\ctxlua{tex.print(#1)}}}
\calculate{1+2} \par
\calculate{3/2-1}\par % the output should be 0,5
\calculate{3*2}\par
% \calculate{sqrt(2)} \calculate{2*π} % 2*\pi
\stoptext
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?
Thank you in advance
Andreas
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^ permalink raw reply [flat|nested] 9+ messages in thread* Re: Formatting numbers in LuaTeX 2010-02-14 10:42 Formatting numbers in LuaTeX Andreas Harder @ 2010-02-14 11:37 ` luigi scarso 2010-02-14 12:11 ` Peter Münster 1 sibling, 0 replies; 9+ messages in thread From: luigi scarso @ 2010-02-14 11:37 UTC (permalink / raw) To: mailing list for ConTeXt users On Sun, Feb 14, 2010 at 11:42 AM, Andreas Harder <andreas.harder@rz-online.de> wrote: > Hi all! > > I played a little bit with LuaTeX in ConTeXt and two questions have arisen. > > \usemodule[calcmath] > \starttext > \def\calculate#1{\calcmath{#1=\ctxlua{tex.print(#1)}}} > \calculate{1+2} \par > \calculate{3/2-1}\par % the output should be 0,5 > \calculate{3*2}\par > % \calculate{sqrt(2)} \calculate{2*π} % 2*\pi > \stoptext > > 1) Is it possible to have a comma as decimal separator? string.format ? -- luigi ___________________________________________________________________________________ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Formatting numbers in LuaTeX 2010-02-14 10:42 Formatting numbers in LuaTeX Andreas Harder 2010-02-14 11:37 ` luigi scarso @ 2010-02-14 12:11 ` Peter Münster 2010-02-14 13:10 ` Andreas Harder 1 sibling, 1 reply; 9+ messages in thread From: Peter Münster @ 2010-02-14 12:11 UTC (permalink / raw) To: mailing list for ConTeXt users 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 Cheers, Peter -- Contact information: http://pmrb.free.fr/contact/ ___________________________________________________________________________________ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Formatting numbers in LuaTeX 2010-02-14 12:11 ` Peter Münster @ 2010-02-14 13:10 ` Andreas Harder 2010-02-14 21:01 ` Hans Hagen 0 siblings, 1 reply; 9+ messages in thread From: Andreas Harder @ 2010-02-14 13:10 UTC (permalink / raw) To: mailing list for ConTeXt users 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 ___________________________________________________________________________________ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Formatting numbers in LuaTeX 2010-02-14 13:10 ` Andreas Harder @ 2010-02-14 21:01 ` Hans Hagen 2010-02-15 19:35 ` Peter Münster 0 siblings, 1 reply; 9+ messages in thread From: Hans Hagen @ 2010-02-14 21:01 UTC (permalink / raw) To: mailing list for ConTeXt users On 14-2-2010 14:10, Andreas Harder wrote: > \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 beware, this creates (and possibly overloads) sqrt, pi and my_equation as gobals Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Formatting numbers in LuaTeX 2010-02-14 21:01 ` Hans Hagen @ 2010-02-15 19:35 ` Peter Münster 2010-02-15 19:38 ` Hans Hagen 2010-02-15 22:25 ` Andreas Harder 0 siblings, 2 replies; 9+ messages in thread From: Peter Münster @ 2010-02-15 19:35 UTC (permalink / raw) To: mailing list for ConTeXt users On Sun, Feb 14 2010, Hans Hagen wrote: >> sqrt = math.sqrt >> pi = math.pi >> function my_equation(s, r) > > beware, this creates (and possibly overloads) sqrt, pi and my_equation as > gobals Indeed... The following hack was *not* so quick, but there is a bug somewhere (a digit is added at the end): \usemodule[calcmath] \startluacode local exp_replacements = {["*"] = "$·$"} local res_replacements = {["sqrt"] = "math.sqrt", ["π"] = "math.pi"} userdata = userdata or {} function userdata.result_as_string(r) r = math.floor(1000 * r + 0.5) / 1000 r = tostring(r) tex.write(r:gsub("%.", ",")) end function userdata.filter_expression(s) for k, v in pairs(exp_replacements) do s = s:gsub(k, v) end tex.write(s) end function userdata.filter_result(s) for k, v in pairs(res_replacements) do s = s:gsub(k, v) end tex.write(s) end \stopluacode \def\calculate#1{% \start \def\Expression{\ctxlua{userdata.filter_expression("#1")}} \def\Result{\ctxlua{userdata.filter_result("#1")}} \calcmath{\Expression=\ctxlua{userdata.result_as_string(\Result)}} \stop } \starttext \startlines \calculate{1+2} \calculate{3/2-1} \calculate{3*2} \calculate{sqrt(2)} \calculate{2*π} \stoplines \stoptext Cheers, Peter -- Contact information: http://pmrb.free.fr/contact/ ___________________________________________________________________________________ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Formatting numbers in LuaTeX 2010-02-15 19:35 ` Peter Münster @ 2010-02-15 19:38 ` Hans Hagen 2010-02-15 22:25 ` Andreas Harder 1 sibling, 0 replies; 9+ messages in thread From: Hans Hagen @ 2010-02-15 19:38 UTC (permalink / raw) To: mailing list for ConTeXt users On 15-2-2010 20:35, Peter Münster wrote: > tex.write(r:gsub("%.", ",")) tex.write((r:gsub("%.", ","))) gsub returns two values ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Formatting numbers in LuaTeX 2010-02-15 19:35 ` Peter Münster 2010-02-15 19:38 ` Hans Hagen @ 2010-02-15 22:25 ` Andreas Harder 2010-02-16 6:08 ` Peter Münster 1 sibling, 1 reply; 9+ messages in thread From: Andreas Harder @ 2010-02-15 22:25 UTC (permalink / raw) To: mailing list for ConTeXt users Am 15.02.2010 um 20:35 schrieb Peter Münster: > On Sun, Feb 14 2010, Hans Hagen wrote: > >>> sqrt = math.sqrt >>> pi = math.pi >>> function my_equation(s, r) >> >> beware, this creates (and possibly overloads) sqrt, pi and my_equation as >> gobals > > Indeed... > > The following hack was *not* so quick, but there is a bug somewhere > (a digit is added at the end): > > \usemodule[calcmath] > \startluacode > local exp_replacements = {["*"] = "$·$"} > local res_replacements = {["sqrt"] = "math.sqrt", ["π"] = "math.pi"} > userdata = userdata or {} > function userdata.result_as_string(r) > r = math.floor(1000 * r + 0.5) / 1000 > r = tostring(r) > tex.write(r:gsub("%.", ",")) > end > function userdata.filter_expression(s) > for k, v in pairs(exp_replacements) do > s = s:gsub(k, v) > end > tex.write(s) > end > function userdata.filter_result(s) > for k, v in pairs(res_replacements) do > s = s:gsub(k, v) > end > tex.write(s) > end > \stopluacode > \def\calculate#1{% > \start > \def\Expression{\ctxlua{userdata.filter_expression("#1")}} > \def\Result{\ctxlua{userdata.filter_result("#1")}} > \calcmath{\Expression=\ctxlua{userdata.result_as_string(\Result)}} > \stop > } > \starttext > \startlines > \calculate{1+2} > \calculate{3/2-1} > \calculate{3*2} > \calculate{sqrt(2)} > \calculate{2*π} > \stoplines > \stoptext I've noticed that one can even use such things as \calculate{3^2}, \calculate{2^3} out of the box and it's easy to add ["e"] = "math.exp(1)", ["sin"] = "math.sin", … But the "$·$"-construct is problematic. It do not work in display style (\let\calcmath\displaycalcmath) and without the dollar-signs the placement and the spacing are wrong. Thank you for your elaboration. Greetings Andreas ___________________________________________________________________________________ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Formatting numbers in LuaTeX 2010-02-15 22:25 ` Andreas Harder @ 2010-02-16 6:08 ` Peter Münster 0 siblings, 0 replies; 9+ messages in thread From: Peter Münster @ 2010-02-16 6:08 UTC (permalink / raw) To: mailing list for ConTeXt users On Mon, Feb 15 2010, Andreas Harder wrote: > > But the "$·$"-construct is problematic. It do not work in display style > (\let\calcmath\displaycalcmath) and without the dollar-signs the placement > and the spacing are wrong. I don't know, why "·" doesn't work, but you can try this: local exp_replacements = {["*"] = "\\\\cdot"} Cheers, Peter -- Contact information: http://pmrb.free.fr/contact/ ___________________________________________________________________________________ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2010-02-16 6:08 UTC | newest] Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2010-02-14 10:42 Formatting numbers in LuaTeX Andreas Harder 2010-02-14 11:37 ` luigi scarso 2010-02-14 12:11 ` Peter Münster 2010-02-14 13:10 ` Andreas Harder 2010-02-14 21:01 ` Hans Hagen 2010-02-15 19:35 ` Peter Münster 2010-02-15 19:38 ` Hans Hagen 2010-02-15 22:25 ` Andreas Harder 2010-02-16 6:08 ` Peter Münster
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