Re: [NTG-context] Formatting numbers in LuaTeX
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
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Re: [NTG-context] Formatting numbers in LuaTeX
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
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Re: [NTG-context] Formatting numbers in LuaTeX
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
-
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Re: [NTG-context] Formatting numbers in LuaTeX
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
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Contact information: http://pmrb.free.fr/contact/
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Re: [NTG-context] Formatting numbers in LuaTeX
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
-
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Re: [NTG-context] Formatting numbers in LuaTeX
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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Re: [NTG-context] Formatting numbers in LuaTeX
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/
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Re: [NTG-context] Formatting numbers in LuaTeX
On Sun, Feb 14, 2010 at 11:42 AM, Andreas Harder
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
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