LuaTeX & printf() function ?

LuaTeX & printf() function ?

[Vnpenguin]

Hi,
Here is my test:
===================================================
\setuppapersize[A4][A4]
\usetypescript[postscript]
\setupbodyfont[palatino,12pt]

\starttext
\startformula
K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}= \ctxlua{tex.print(355/14)}
\stopformula
\stoptext
===================================================

It works well and give me result = 25,357142857143. In order to obtain
2 decimal number I tried:

\startformula
K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}=
\ctxlua{tex.printf("%0.2f",355/14)}
\stopformula

But it does not work. Here is the error:

tex.printf("\doplaceformulanumber \stopdisplaymath \global \let \gdef \ETC.
! File ended while scanning text of \zerocount.
<inserted text>
                }
<*> ./test-lua.tex
?

Another try:

\startformula
K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}=
\ctxlua{tex.print(string.format("%0.2f",355/14))}
\stopformula

gives me the same error.

So is there really a function printf() in LuaTeX engine ?

Thanks
___________________________________________________________________________________
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
___________________________________________________________________________________

Re: LuaTeX & printf() function ?

[luigi scarso]

On Fri, Jul 23, 2010 at 10:25 PM, Vnpenguin <vnpenguin@vnoss.org> wrote:
> Hi,
> Here is my test:
> ===================================================
> \setuppapersize[A4][A4]
> \usetypescript[postscript]
> \setupbodyfont[palatino,12pt]
>
> \starttext
> \startformula
> K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}= \ctxlua{tex.print(355/14)}
> \stopformula
> \stoptext
> ===================================================
>
> It works well and give me result = 25,357142857143. In order to obtain
> 2 decimal number I tried:
>
> \startformula
> K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}=
> \ctxlua{tex.printf("%0.2f",355/14)}
> \stopformula
>
> But it does not work. Here is the error:
>
> tex.printf("\doplaceformulanumber \stopdisplaymath \global \let \gdef \ETC.
> ! File ended while scanning text of \zerocount.
> <inserted text>
>                }
> <*> ./test-lua.tex
> ?
>
> Another try:
>
> \startformula
> K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}=
> \ctxlua{tex.print(string.format("%0.2f",355/14))}
> \stopformula
>
> gives me the same error.
>
> So is there really a function printf() in LuaTeX engine ?
>
> Thanks
> ___________________________________________________________________________________
> 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
> ___________________________________________________________________________________
>
hm, what about
 tex.sprint(tex.ctxcatcodes,string.format("\%.2f",355/14)
?
-- 
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
___________________________________________________________________________________

Re: LuaTeX & printf() function ?

[luigi scarso]

On Fri, Jul 23, 2010 at 10:38 PM, luigi scarso <luigi.scarso@gmail.com> wrote:
> On Fri, Jul 23, 2010 at 10:25 PM, Vnpenguin <vnpenguin@vnoss.org> wrote:
>> Hi,
>> Here is my test:
>> ===================================================
>> \setuppapersize[A4][A4]
>> \usetypescript[postscript]
>> \setupbodyfont[palatino,12pt]
>>
>> \starttext
>> \startformula
>> K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}= \ctxlua{tex.print(355/14)}
>> \stopformula
>> \stoptext
>> ===================================================
>>
>> It works well and give me result = 25,357142857143. In order to obtain
>> 2 decimal number I tried:
>>
>> \startformula
>> K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}=
>> \ctxlua{tex.printf("%0.2f",355/14)}
>> \stopformula
>>
>> But it does not work. Here is the error:
>>
>> tex.printf("\doplaceformulanumber \stopdisplaymath \global \let \gdef \ETC.
>> ! File ended while scanning text of \zerocount.
>> <inserted text>
>>                }
>> <*> ./test-lua.tex
>> ?
>>
>> Another try:
>>
>> \startformula
>> K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}=
>> \ctxlua{tex.print(string.format("%0.2f",355/14))}
>> \stopformula
>>
>> gives me the same error.
>>
>> So is there really a function printf() in LuaTeX engine ?
>>
>> Thanks
>> ___________________________________________________________________________________
>> 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
>> ___________________________________________________________________________________
>>
> hm, what about
>  tex.sprint(tex.ctxcatcodes,string.format("\%.2f",355/14)
sorry
 tex.sprint(tex.ctxcatcodes,string.format("\%.2f",355/14))


-- 
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
___________________________________________________________________________________

Re: LuaTeX & printf() function ?

[Vnpenguin]

On Fri, Jul 23, 2010 at 22:39, luigi scarso <luigi.scarso@gmail.com> wrote:
> On Fri, Jul 23, 2010 at 10:38 PM, luigi scarso <luigi.scarso@gmail.com> wrote:
>> On Fri, Jul 23, 2010 at 10:25 PM, Vnpenguin <vnpenguin@vnoss.org> wrote:
>>> Hi,
>>> Here is my test:
>>> ===================================================
>>> \setuppapersize[A4][A4]
>>> \usetypescript[postscript]
>>> \setupbodyfont[palatino,12pt]
>>>
>>> \starttext
>>> \startformula
>>> K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}= \ctxlua{tex.print(355/14)}
>>> \stopformula
>>> \stoptext
>>> ===================================================
>>>
>>> It works well and give me result = 25,357142857143. In order to obtain
>>> 2 decimal number I tried:
>>>
>>> \startformula
>>> K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}=
>>> \ctxlua{tex.printf("%0.2f",355/14)}
>>> \stopformula
>>>
>>> But it does not work. Here is the error:
>>>
>>> tex.printf("\doplaceformulanumber \stopdisplaymath \global \let \gdef \ETC.
>>> ! File ended while scanning text of \zerocount.
>>> <inserted text>
>>>                }
>>> <*> ./test-lua.tex
>>> ?
>>>
>>> Another try:
>>>
>>> \startformula
>>> K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}=
>>> \ctxlua{tex.print(string.format("%0.2f",355/14))}
>>> \stopformula
>>>
>>> gives me the same error.
>>>
>>> So is there really a function printf() in LuaTeX engine ?
>>>
>>> Thanks
>>>
>> hm, what about
>>  tex.sprint(tex.ctxcatcodes,string.format("\%.2f",355/14)
> sorry
>  tex.sprint(tex.ctxcatcodes,string.format("\%.2f",355/14))
>

Ahhhhhhh, forgot to escape %, my bad !!!
The code \ctxlua{tex.print(string.format("\%0.2f",355/14))} works ok for me.

Thanks,
___________________________________________________________________________________
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
___________________________________________________________________________________

Re: LuaTeX & printf() function ?

[Hans Hagen]

On 23-7-2010 10:53, Vnpenguin wrote:
> \startformula
>>>>  K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}=
>>>>  \ctxlua{tex.print(string.format("%0.2f",355/14))}
>>>>  \stopformula
>>>>

or

     \ctxlua{context("\letterpercent0.2f",355/14)}

we can consider adding

\let\pct\letterpercent

but nice is:

     \ctxluacode{context("%0.2f",355/14)}

i'll add this but keep in mind that this will only work in the text 
stream, not in macro definitions or as arguments

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 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
___________________________________________________________________________________

Re: LuaTeX & printf() function ?

[Vnpenguin]

On Fri, Jul 23, 2010 at 23:23, Hans Hagen <pragma@wxs.nl> wrote:
> On 23-7-2010 10:53, Vnpenguin wrote:
>>
>> \startformula
>>>>>
>>>>>  K = \frac{\sigma_1}{\sigma_2} = \frac{355}{14}=
>>>>>  \ctxlua{tex.print(string.format("%0.2f",355/14))}
>>>>>  \stopformula
>>>>>
>
> or
>
>    \ctxlua{context("\letterpercent0.2f",355/14)}
>
> we can consider adding
>
> \let\pct\letterpercent
>
> but nice is:
>
>    \ctxluacode{context("%0.2f",355/14)}
>
> i'll add this but keep in mind that this will only work in the text stream,
> not in macro definitions or as arguments
>

With the format "%..." it's better to call something like
\clxluacode{contextf()} ? (like print() & printf())
___________________________________________________________________________________
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
___________________________________________________________________________________

Re: LuaTeX & printf() function ?

[Hans Hagen]

On 23-7-2010 11:29, Vnpenguin wrote:

> \clxluacode{contextf()} ? (like print()&  printf())

No, as context() is already built in for quite a while and I don't want 
to polute the global namespace any more that it already is.

Also, there is no printf in lua and I see no reason to mimick c calls 
(for me printf does not feel more natural).

Hans


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 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
___________________________________________________________________________________