Questions tagged [lua]
Lua is a powerful, fast, lightweight, embeddable scripting language.
239
questions
1
vote
1answer
35 views
ConTeXt: Typeset XML attribute containing newlines
Background
A user can provide their address information in a text area, separating lines by pressing Enter. An XML document is generated, which replaces the new line character with \n, such as in the ...
1
vote
1answer
46 views
LuaLaTeX require path — only absolute paths work [closed]
I would like to use external packages for LuaLaTeX scripting (eg.penlight). I often test my scripts with texlua command without issues. However, I noticed when I compile the document with the lualatex ...
1
vote
1answer
63 views
Use unicode COMBINING LOW LINE (U+0332) as underline
In the same vein as Using unicode "combining right arrow above" to generate vector command, I’d like to use U+0332 “ ̲” as a “graphical” alias for \underline.
I don’t know Lua, so I’m not ...
0
votes
0answers
76 views
Why doesn't luatex recognise lyaml, a manually installed library (when lua itself does)?
I want to parse a yaml file containing my CV data and then write content programatically, in LaTeX, from that data. I have installed the relevant library lyaml and it works, but lua(la?)tex doesn't ...
3
votes
2answers
57 views
When building tkz commands with lua to use in LuaLaTex, carriage returns make it fail
I have got a strange behaviour. In a lua program, I use CRs to make it more readable. When I execute my lua program with ZeroBrane and copy the result in LuaLaTeX, it works well. When I use \luaexec{...
1
vote
1answer
75 views
Can I make \directlua understand unicode chars like ≥, ≤, ≠, ∙, and −?
MWE:
\directlua{%
local abs=math.abs
function gcd(x, y)
if y \csstring\~= 0 then
return gcd(y, x \csstring\% y)% I would like to write "≠" instead of "~=".
else
...
0
votes
0answers
74 views
Luacode with several .tex files [duplicate]
I wrote some luacode in my main.tex and I'm a adding several other files due to \input{code.tex}
I already asked this question here
and it works on a standalone environment but not in my case. I can't ...
4
votes
1answer
114 views
Plotting function defined with Lua doesn't do anything
hopefully you can help me.
I tried to plot a function with Tikz and Lua in the following way
\documentclass[14pt]{book}
\usepackage{marginnote}
\usepackage{amsmath}
\usepackage{multicol}
\usepackage{...
0
votes
1answer
55 views
Syntax error in LuaLaTeX \directlua code
I have the below document that I try to compile with LuaLaTex (using the MiKTeX package).
\documentclass{article}
\usepackage{pgfplots}
\pgfplotsset{compat=newest}
\begin{document}
\expandafter\...
0
votes
1answer
88 views
Lua Multiple for-loop statement
My XML Look is:
<contrib-group content-type="all">
<contrib contrib-type="author"><name><surname>Bronnikov</surname><given-names>Kirill A<...
1
vote
0answers
61 views
how to find any values include special characters using lua regex
local tex = '\\authors{\\author[]{{Surname} {FirstName}\\textsuperscript{\\hyperref[{article-id-affiliationnumber1}]}{{\\textsuperscript{,{\\textcolor{blue}{article-id-affiliationnumber2}}}}}{{\\...
2
votes
1answer
87 views
LuaTeX: lua best coding practices
What are some of the best coding practices to follow when splitting and loading lua code from multiple external lua files, and dealing with lua code from other lualatex packages. This thought comes to ...
1
vote
1answer
78 views
LuaTeX node library: Vertical glue/kern does not work in manually made nodelist, what is missing?
This is a LuaTeX node-library/ node-list question.
In the following code, I am trying to typeset a manually crafted nodelist. To add a line break, I add a penalty node, and that works fine (i.e. the ...
0
votes
0answers
30 views
font substitute is not working in lualatex for missing glyphs with another fonts
I have refered this link: Automatically substitute missing glyph with another in LuaLaTeX
My LaTeX MWE IS:
\documentclass{article}
\usepackage[no-math]{fontspec}
\directlua{
fonts.handlers.otf....
0
votes
1answer
40 views
Lua OR find and Replace
My LaTeX-out.tex TeX Code is (single line):
\begin{align*}\alpha + \beta = \gamma\end{align*} Some text here. \begin{align*}\sum^{k}_{i=1} \iota \end{align*} and so on the text. \begin{...
0
votes
1answer
135 views
Translate TOC data to a Lua data-structure, and create custom table of content style
Given nested loops & data-structures are more elegant in Lua (than in TeX), I think plurality of table of contents style would be easier to write in Lua. For that to work, two things would be ...
0
votes
1answer
77 views
tex.sprint in LuaLaTeX
I would like to print text as per XML file. But when using tex.sprint enter mark is removed and all the text are displayed in single line in PDF. How do avoid this?
My ds.tex file is
\documentclass{...
0
votes
1answer
53 views
To Remove Enter marks (\n) in Lua
I have using LuaLaTeX Version : 1.12.0 and i have converting XML to LaTeX using Lua Script.
I have need to remove enter marks in Lua Scripts. How to achieve this.
\documentclass{article}
\begin{...
1
vote
1answer
112 views
How to generate a centered and captioned TikZ figure in a .docx file that has been converted from .tex with pandoc?
Recently, I have been having some issues with TikZ in LaTeX. I want to convert my PhD dissertation, written in LaTeX, to .docx using pandoc. I am able to use lua filters to have pandoc convert TikZ ...
0
votes
2answers
68 views
Global Regular Expression in Lua Script
I have the below LaTeX coding in whole my document and want to do convert globally:
\author{Bronnikov Kirill A{$^{1}$}{$^{2}$}{$^{3}$}}
\author{Santos N O{$^{4}$}{$^{5}$}}
\author{Wang Anzhong{$^{6}$...
0
votes
0answers
50 views
Lua Output Store in Separate Filename
I have used Regular Expression in Lua Script. After Conversion i would like to store the updation in separate file (ex: output.tex). How to achive this?
My Lua Script is:
local s = {}
local ...
0
votes
1answer
49 views
Lua Script Output separate extra lines
My Input Latex:
\documentclass{article}
\usepackage{latexsym,amsmath,amssymb,amscd}
\begin{document}
\title{title}
\author{author}
\maketitle
In this article we denote
\begin{equation}
\nu:=\frac{1}{...
0
votes
1answer
40 views
enumerate item showing errors in tex4ht
The below LaTeX enumerate list and after end{equation}\\ showing errors in tex4ht. How do solve this? I know to solve this errors through Lua Script. But i would like to know how to fix this type of ...
3
votes
0answers
63 views
How to prevent Lua-based macros from acting on nested macro names in ConTeXt?
I have two Lua functions that manipulate their arguments in different ways, and two new ConTeXt macros defined to let me use them.
I tried to nest them together, but they seem to also be consuming and ...
2
votes
1answer
101 views
LuaTeX: Is there a way to define new named tex box purely on lua side (with desired checks)?
So far in my dealings with named tex boxes in luatex, I am able to set/get/copy its contents in lua code, but don't know how define new tex box in lua. The manual doesn't have a method explicitly ...
1
vote
0answers
95 views
LuaTeX: UTF-8 character extraction, is one way more accurate and/or preferable than another
While experimenting ways to extract UTF-8 character strings from TeX boxes, I found a post from user micahl-h21 here: UTF-8 text extraction. After looking at the way glyph data is stored in the ...
1
vote
0answers
49 views
LuaTeX - printing string literal producing strange dots
When I try to print a literal string with LuaTeX, these strange dots appear. Does anyone know why? Any suggestions to work around this?
I was thinking of parsing the literal string line by line and ...
0
votes
0answers
77 views
LuaLatex , how put glyph freely
Lua are incredible engine. I have a font in ttf and I would put a specific glyph in a specific place.
For example I create a logo.
I need to put second version of 'a' in (x,y)=(12pt,30pt) from left ...
1
vote
1answer
62 views
passing a ConTeXt reference `(context.currentstructurereference)` to a lua function
I'd like to pass some ConTeXt references to a Lua function. Like in the following MWE, the idea is to have tables name passed to a function via context.currentstructurereference. The MWE fails to ...
2
votes
0answers
75 views
Lua function that replaces strings, but ignores spaces and TeX comments
I would like a Lua function for LuaTeX, called
replaceButIgnoreSpacesAndComments (<string>, <what to replace>, <what to replace it by>)
It is supposed to work like a string ...
1
vote
1answer
75 views
LuaLaTeX Element with attribute values find
I have need to find <ELEMENT attr="A2"> and print in PDF. How to achieve this. My MWE is:
\documentclass{article}
\usepackage{luacode}
\begin{luacode*}
xml = require('luaxml-mod-xml')
...
2
votes
1answer
131 views
Define an incremental counter with Lua
I would like to receive a suggestion for this example. Really, it is more a question related to Lua scripting.
Minimal working example
\documentclass{beamer}
\directlua{dofile("timer.lua")}
...
0
votes
0answers
35 views
Reading information from .bib file with lua? [duplicate]
I'm wondering if it's possible to access the information in a .bib file using Lua code in LuaTeX. Basically, I have a function where I'd like to be able to add idiosyncratic custom citation styles for ...
29
votes
1answer
1k views
What are some typical LuaTeX gotchas?
The interaction of TeX and Lua can be quite delicate at times. While the former has category codes and tokens, the latter has escape sequences and datatypes. Mixing the disparate concepts of these ...
0
votes
1answer
100 views
LuaLatex: use argument for \input, specification of lua, luatex and tex interaction
I want to process command line arguments directly for usage in lua code and subsequent latex.
Looking for documentation I found no hints to tex-bindings for the \input command.
In this sample case I ...
2
votes
1answer
189 views
MathML Format XML in Lua
I have successfully loaded XML in LuaLaTeX. But how to load MathML. Any Lua Modules are available?
My LaTeX file:
\documentclass{article}
\usepackage{luacode}
\begin{luacode*}
xml = require('luaxml-...
0
votes
1answer
40 views
how to add newline when printing to console in luacode function?
I'd like to print to the console (not back to latex) from inside luacode function.
But I am not able to figure how to do it. When I add \n it does not like it. I am using print from inside lua to ...
1
vote
1answer
63 views
trouble matching %s in LuaTeX argument containing LaTeX command
I hope I can communicate this clearly. I've been trying to pass an argument to a Lua function that contains LaTeX commands. Normally this works fine, but if Lua tries to match/sub %s within this ...
0
votes
0answers
59 views
luatex node library: replace glyph with hlist containing glyph
While trying to replace glyph node with a hlist containing the glyph I was expecting to see the same output on the line, but I see boxes overlap, and get a pdf backend warning. Here, the warning ...
0
votes
0answers
65 views
How can lua help class or package authors?
I am maintaining a rather simple class for internal company use for myself and some collegues. Mostly simple stuff like including the logo, setting the paper formats, adjust the colors, set headers ...
2
votes
1answer
97 views
Variable processing, lualatex or expl3, or something else?
I commonly find myself facing the same task of streamlining complex data entry for classes I write. I alway use the same front end. Data is entered and stored in variables, then a processing command ...
3
votes
1answer
117 views
make4ht: allowing the build process to continue when parsing fails
I use make4ht to produce html; part of the process is a custom build file that parses the HTML and does some checking/operations:
mwe.tex
\documentclass{article}
\begin{document}
test: $2^3$
...
2
votes
1answer
60 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
226 views
Require gives error in lualatex in texlive 2020 and Ubuntu Bionic
I have tried many ways to include a module installed by luarocks in a tex file to be processed by lualatex, but all methods give me
/texmf-dist/tex/luatex/lualibs/lualibs-basic-merged.lua:381: ...
1
vote
1answer
95 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 = {} -- ...
1
vote
1answer
190 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
106 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
107 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
...
5
votes
1answer
198 views
Using unicode “combining right arrow above” to generate vector command in Plain LuaTeX
As Marcel Krüger has shown in his answer
Using unicode "combining right arrow above" to generate vector command
it is possible to use the “combining right arrow above” as the \vec command. ...
