Questions tagged [directlua]
The directlua tag has no usage guidance.
57
questions
0
votes
1
answer
27
views
Pass string with escape characters and comma through xkeyval package while compiling the document with LuaLaTeX
The following is the code of the file temptest.sty
\ProvidesPackage{temptest}
\RequirePackage{amsmath,amssymb}
\RequirePackage{xkeyval}
\RequirePackage{luacode}
\begin{luacode*}
function myfunc(m,n)
...
- 1,411
1
vote
2
answers
36
views
Alignment Gets changed in tabular environment on adding argument in lua function on compiling with LuaLaTeX
The following code works and gives expected output with expected alignment.
\documentclass{article}
\usepackage{luacode}
\begin{luacode}
function myfunc()
str2=[[$1$ & $2$ & $3$ & $4$ &...
- 1,411
0
votes
1
answer
38
views
macros avoid linebreak if macro expands to nothing
I know this one is quite similar to this post (from me). But even with using % all over the place and \ignorespaces there is still a linebreak.
See my mwe: (main2.tex)
\documentclass{article}
\...
- 393
2
votes
1
answer
270
views
How do you select individual end alternate/swash characters with LuaLaTeX and fontspec?
Basic Problem Statement
I would like to enable some (but not all) stylistic alternate ".end" characters from an OpenType font, on condition that they replace terminal characters in a word.
...
- 123
1
vote
1
answer
62
views
Table CHAR alignment in XML
I have successfully loaded XML in LuaLaTeX with XML-Tables based on this example
Count Number of Columns in XML.
I have need the table alignments from tbody instead of thead. And how to define ...
- 2,046
1
vote
1
answer
47
views
Figure Text in same Document with Anchor Tag
I had referred this link: Create Separate File using LuaLaTeX
But i have need in the same document.
I would like to give anchor tags in the figure caption and move the figure caption text in the top ...
- 2,046
1
vote
1
answer
105
views
Can I make a macro behave like \numexpr?
For example I define \fpeval in Plain LuaTeX:
\begingroup
\catcode`\%=12
\directlua{
function math.round_int ( x )
return x>=0 and math.floor(x+0.5) or math.ceil(x-0.5)
end
function ...
- 804
2
votes
2
answers
95
views
\let\mySection\section with directlua
Next lualatex MWE emulates \newcommand\mySection{\section} on the lua side.
% !TEX TS-program = lualatex
\documentclass{article}
\begin{document}
\directlua{
token.set_macro('mySection', '\\section')...
- 742
0
votes
1
answer
39
views
Fixing error during collection of all boxes
i tired the code from this answer to arrange images loaded by includegraphics but got some errors i can not fix. the following code
module(...,package.seeall)
local function get_boxes(parent)
local ...
- 2,859
3
votes
1
answer
46
views
Command calls LuaLaTeX function, backslash in argument [duplicate]
I would like to create a command that simply prints what I give to it, but through Lua. Pointless for now, but I want to expand this to a more complex use-case. I've read a few answers around here, ...
- 1,080
1
vote
1
answer
157
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 ...
- 1,286
2
votes
1
answer
95
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
...
- 804
1
vote
1
answer
83
views
Problem writing to file through \directlua in a memoir class document
Below is a minimal example of some code where the memoir class seems to collide with Lua code, executed within a \directlua command, that writes to an external file.
Can anyone help me figure out the ...
- 41
0
votes
1
answer
122
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\...
- 259
2
votes
1
answer
256
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 ...
- 1,228
0
votes
0
answers
36
views
Unwanted spacing between text and tikzpicture caused by "non-visual" code lines
I want to show some subgraphs of a certain graph. I want them side by side and labeled.
This is what I've got:
I can't provide working LaTeX-code, since I have implemented the graphdrawing ...
- 3
3
votes
2
answers
146
views
How to pass macro arguments (#1, #2, ..) to Lua variables
This question is probably trivial, but I started exploring Lua(La)TeX a couple of hours ago so bear with me.
The MWE is the following:
test.tex:
\documentclass{article}
\directlua{require("test....
- 1,994
0
votes
1
answer
63
views
Problem using macros in directua [duplicate]
I have the following external lua script:
-- file mylua.lua
function test(input)
tex.sprint(input)
end
And the following lualatex document:
\documentclass{article}
\usepackage{luacode}
\directlua{...
- 7,705
1
vote
0
answers
72
views
Incompatibility between LuaLatex font feature and Graphite?
when I use LuaLaTeX to modify my font (for example here kerning) at the same time as Graphite, there seems to be a problem because nothing happens. Everything seems to go well when I'm not using ...
- 427
2
votes
1
answer
294
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")}
...
- 359
2
votes
1
answer
285
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-...
- 85
2
votes
1
answer
75
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 ...
- 1,411
5
votes
2
answers
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....
- 1,411
1
vote
1
answer
104
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 = {} -- ...
- 1,411
2
votes
1
answer
332
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 ...
- 1,411
4
votes
1
answer
118
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 ...
- 1,411
2
votes
1
answer
141
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
...
- 1,411
2
votes
1
answer
99
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{} ...
- 101
3
votes
1
answer
186
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 = ...
- 33
2
votes
2
answers
575
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 ("...
- 71
4
votes
1
answer
424
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)...
- 90.4k
3
votes
2
answers
295
views
How can I use \n in \directlua{} to replace empty lines
Let’s 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 ...
- 53.3k
15
votes
2
answers
957
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 ...
- 1,411
0
votes
0
answers
172
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=...
- 1,411
1
vote
1
answer
170
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}
\...
- 1,411
0
votes
1
answer
162
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{...
- 1,411
4
votes
2
answers
159
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 ...
- 1,411
2
votes
2
answers
418
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 ...
- 1,411
9
votes
1
answer
563
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 % ...
- 1,411
8
votes
3
answers
549
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) )
...
- 1,411
3
votes
1
answer
112
views
realscripts – 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 ...
- 2,817
1
vote
1
answer
896
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[...
- 67
2
votes
1
answer
150
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 ...
- 71
5
votes
1
answer
247
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{...
- 847
7
votes
0
answers
616
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
1
answer
70
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 ...
- 123
4
votes
1
answer
129
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 -. ...
- 3,224
2
votes
2
answers
3k
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.
...
user139954
3
votes
0
answers
296
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 ...
- 281
4
votes
3
answers
323
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} ...
- 321