Questions tagged [directlua]
The directlua tag has no usage guidance.
37
questions
3
votes
1answer
51 views
Importing luaqd library in LuaTeX
I am looking for easy way to importing lqd or some other similar library in LuaTeX so that It can used in LaTeX. The lmapm library is wriiten by Luiz Figueiredo, one of the authors of the Lua ...
5
votes
2answers
1k views
Incorrect value of Pi in Lua after 16th Decimal Place
The following is the code.
\documentclass{article}
\usepackage{luacode}
\begin{document}
\luaexec{tex.sprint(string.format('\%.20f', math.pi))}
\end{document}
It gives the output as
3....
2
votes
1answer
86 views
Setting Environment while defining complex numbers in LuaTeX
My question is inspired from this question that I asked earlier. Here is the code.
\documentclass{article}
\usepackage{parskip,luacode}
\begin{luacode*}
M = {} -- the module
complex = {} -- ...
2
votes
1answer
95 views
Evaluating Mathematical Expressions in Lua
Here is the code.
\documentclass{article}
\begin{document}
\directlua{tex.sprint(tostring(math.sin(math.pi)))} \\
\directlua{tex.sprint(tostring(math.tan(math.pi/2)))}
\end{document}
I am expecting ...
4
votes
1answer
87 views
Trouble while giving input from tex.sprint function to another function in LuaTeX
I have the set.lua file with the following code.
local Set = {} --module
local mt = {} --metatable
function Set.new (l)
local set = {}
setmetatable(set, mt)
for ...
2
votes
1answer
76 views
Error when Metatable is set for global environment in Lua LaTeX
I have the set.lua file with the following code.
local Set = {} --module
local mt = {} --metatable
setmetatable(_G,{__index=function(t,k) return k end})
--some functions
return Set
...
2
votes
1answer
44 views
siunitx table, formatting \directlua{} ouput
I have a table with values calculated with \directlua{}.
They are formatted with siunitx columns.
I want to turn some values bold or change their color.
It appears that the output of \directlua{} ...
2
votes
1answer
98 views
Gregorio - Glyph missing?
I've just updated to TexLive 2019 on Mac and then Gregorio 5.2.1.
This is the file I'm trying to compile (with my past distribution of TexLive 2018):
% !TEX program = LuaLaTeX+se
% !TEX encoding = ...
0
votes
1answer
131 views
I wish to set PDF metadata from within LuaTeX
I found out how to implement the Lua code for setting PDF metadata. I have failed.
My code:
\directlua0{
pdf.setinfo ("Title", "Naked Cheerleaders on Crack")
pdf.setinfo ("Creator", "LuaTeX")
...
4
votes
1answer
111 views
transform a scientific notation to decimal notation with lua
The next code gives 5e-05 with \luaveclen{0.00003}{0.00004} but I need a decimal How to get a decimal notation ?
\def\luaveclen#1#2{
\directlua{
x = #1;
y = #2;
r=(x*x+y*y)...
3
votes
2answers
77 views
How can I use \n in \directlua{} to replace empty lines
Letās assume I have a file file.txt containing
This is
a test
and I want to replace the contents (from within TeX) with
This is\par a test
I tried to use Lua but stuck with the \n in the ...
0
votes
0answers
28 views
Issues trying to expand tex macro's fully in directlua
I am trying to create a JSON file from a LaTeX report that will be used for some post-processing.
For a number of values from my report I will need an expanded version that basically only includes ...
15
votes
2answers
879 views
Different answers of calculations in LuaLaTeX on local computer, lua compiler and on overleaf
Here is the code. It makes use of the file matrix.lua available at the following link.
https://github.com/davidm/lua-matrix/blob/master/lua/matrix.lua
The following code is to be run by matrix.lua ...
0
votes
0answers
121 views
Issue with xparse and lualatex
I have the following code
\documentclass{article}
\usepackage{luacode,xparse,amsmath}
\begin{luacode*}
local matrix = require "matrix"
local complex = require "complex"
function add(m,n)
m=...
1
vote
1answer
109 views
Nesting of functions not working in lualatex
Here is the code. It makes use of the file matrix.lua available at the following link.
https://github.com/davidm/lua-matrix/blob/master/lua/matrix.lua
\documentclass{article}
\usepackage{luacode}
\...
0
votes
1answer
86 views
Using output of one lua function as input of another function in tex file
The following is the code.
\documentclass{article}
\usepackage{luacode}
\begin{document}
\begin{luacode*}
function string(x)
tex.sprint(x)
end
function combine(x,y)
tex.sprint(x.." "..y)
end
\end{...
4
votes
2answers
135 views
Bug in Lualatex: not printing characters from calculation
I have the following code
\documentclass{article}
\usepackage{luacode}
\begin{document}
\begin{luacode*}
local matrix = require "matrix"
local complex = require "complex"
function cmatrix(n)
return ...
2
votes
2answers
197 views
How to pass array of values in lualatex?
Here is code for matrix multiplication.
\documentclass{article}
\usepackage{luacode}
\begin{luacode}
function MatMul( m1, m2 )
if #m1[1] ~= #m2 then
return nil
end
local ...
9
votes
1answer
297 views
Finding Greatest Common Divisor using LuaLatex
Here is my code to find Greatest Common Divisor of two positive integers.
\documentclass{article}
\usepackage{luacode}
\begin{luacode}
function gcd(a,b)
if b ~= 0 then
return gcd(b, a % ...
8
votes
3answers
459 views
Arithmetics in LuaLaTeX
I have the following code.
\documentclass{article}
\usepackage{luacode}
\begin{luacode}
function fact(n)
if n == 0 then
return 1
else
tex.sprint ( n * fact(n - 1) )
...
2
votes
1answer
57 views
realscripts ā can fakescripts substitute single missing chars
I have a font with real OT-superscripts which I can use easily with the realscripts-package. But I also need a superscript decimal dot which doesn't exist, thus realscripts falls back to the regular ...
1
vote
1answer
253 views
How can I use math.log10 function with the directlua?
I would like to know how I can use math.log10 function with the directlua, because I always get none from directlua.
Following a minimal example:
%Engine: LuaLaTeX;
%Encoding: UTF-8;
\documentclass[...
2
votes
1answer
73 views
Coerce LuaTeX into outputting a newline character
I encounter a problem when I wish to output a text file
using a \directlua directive. There where I wish a
newline character to be, I run into TeX problems.
My solution is to invoke the dofile ...
5
votes
1answer
129 views
token.set_macro: \directlua vs. luacode*
If I compile the following code with LuaLaTeX I get the word "RED" as output. The call of token.set_macro inside of luacode* seems to be noneffective.
\listfiles
\documentclass{minimal}
\usepackage{...
6
votes
0answers
343 views
Pre-built preamble with LuaLaTeX and microtype
I have been trying to get super-fast compiles with LuaLaTeX by using a pre-built preamble for my documents. However, every time I try to compile, I get this error:
No file main.aux.
[\directlua]:1: ...
0
votes
1answer
54 views
How to integrate xkeyval keys with Lua code
I am currently maintaining a template that uses directlua to compute a value based on a number of parameters defined as command keys with keyval. As it stands, it compiles correctly. However, when I ...
4
votes
1answer
100 views
Kerning of pairs with LuaTeX for babel shorthands
I want to make use of the pairwise kerning of this answer: https://tex.stackexchange.com/a/370469/75284 using fonts.handlers.otf.addfeature to adjust the kerning of character pairs with the hyphen -. ...
2
votes
2answers
1k views
Using direct lua to read binary bytes to plain text?
In this thread, @David Carlisle tells us how to use luatex to read some of the properties of a png image. Alas, the image library seems to fail regarding the colorspace property. Always reports nil.
...
3
votes
0answers
273 views
TeXstudio - Preventing syntax highlighting effects from LaTeX special characters in Lua code
Is there way to make TeXstudio ignore the contents of a \directlua command when performing syntax highlighting? Currently, it ends up causing highlighting like:
Which is distracting when scanning the ...
4
votes
3answers
261 views
Selecting a Specific Array Element in LuaTeX?
I need to create a command that goes \MyCommand{x,y} or \MyCommand{x,y,z} (both ways should be possible), where x, y, and z are three numbers. It should give the output \begin{matrix}x\\y\end{matrix} ...
6
votes
1answer
622 views
LuaLaTeX: Calculate length in Lua
I apologize if this a rookie question, but I find it extremely hard to find a solution to my Lua problem using online searches and browsing reference manuals.
I would like to calculate a length: ...
1
vote
1answer
251 views
Create external file (like a Makefile) whit real tabs
I'm trying to generate a external Makefile (and others) file using latex and the filecontents or fancyvrb package. As the \t (tabs) characters in input file are converted to space in output file (see ...
6
votes
2answers
336 views
Code Comment in directlua
How can I add comments to my directlua code?
{\catcode`\%=12
\directlua{
function boxed (s)
??? Add a comment ???
if not(boxedflag) then
i=string.find(s,'^!!!')
if(i==1) then
boxedflag=true
...
6
votes
2answers
325 views
Write to aux file directly from lua
Is it possible to write to the aux file directly from within a \directlua command?
I am converting an older package to LuaLaTeX, which at some point builds a large string and writes it to the aux ...
4
votes
1answer
156 views
Fixing problems in latin translitteration of acute accented cyrillic vowels with \directlua
A good translitteration method from cyrillic to latin characters using XeLaTeX is discussed in Using XeTeX for automatic transliteration of cyrillic letters
Actually I'm using LuaLaTeX. the ...
4
votes
1answer
157 views
How to get a customized number of decimal places in tex.sprint / directlua / qrCode?
The number of decimal places is "9" in the following example: string.format("\%0.9f", X).
How can one achieve the replacement of the fixed "9" decimal places with "NumberOfDecimalPlaces" (in ...
2
votes
1answer
2k views
How to get a carriage return (newline) in directlua (tex.sprint) inside a QRCode?
How can one get a carriage return at the end of each line (Lualatex) ?
\documentclass{article}
\usepackage[nolinks,forget]{qrcode}%
\begin{document}
\newcommand{\Space}[0]{\ }%
\newcommand{\...
