Re: LuaTeX & printf() function ?

[Vnpenguin <vnpenguin@vnoss.org>]

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,
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